| |
CX2SA > SATDIG 02.06.11 09:13l 1162 Lines 34551 Bytes #999 (0) @ WW
BID : AMSATBB6300
Read: GUEST
Subj: AMSAT-BB-digest V6 300
Path: IZ3LSV<IW0QNL<JH4XSY<JE7YGF<XE1FH<HI5MLE<CX2SA
Sent: 110602/0709Z @:CX2SA.LAV.URY.SA #:8713 [Minas] FBB7.00e $:AMSATBB6300
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. SAT VUCC (RONALD CADE)
2. Re: G5500 change voltage supply (i8cvs)
3. Re: G5500 change voltage supply (i8cvs)
4. What Astronauts Photograph (Clint Bradford)
5. Re: What Astronauts Photograph (Donald Jacob)
6. Fixed! Re: Landwehr 70cm preamp device question?
(Mark L. Hammond)
7. Re: Fixed! Re: Landwehr 70cm preamp device question? (i8cvs)
8. Re: Fixed! Re: Landwehr 70cm preamp device question?
(Mark L. Hammond)
9. Re: Fixed! Re: Landwehr 70cm preamp device question?
(Mark L. Hammond)
10. Museum Ships Weekend (Rick Tejera)
11. Show Low AZ hamfest on Saturday (4 June)
(Patrick STODDARD (WD9EWK/VA7EWK))
12. AO-51 over Hawaii (Robert Smith)
13. Question about duplexers/diplexers (Mark Lunday)
14. w1w this weekend (Rodney Waln)
15. Re: Fixed! Re: Landwehr 70cm preamp device question? (i8cvs)
16. Re: Fixed! Re: Landwehr 70cm preamp device question?
(Edward R. Cole)
----------------------------------------------------------------------
Message: 1
Date: Wed, 1 Jun 2011 12:00:46 -0700
From: "RONALD CADE" <w6zq_7@xxx.xxx>
Subject: [amsat-bb] SAT VUCC
To: <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS49E63AAF9F3E666948460E77D0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
SAT VUCC standings now on LotW, June 1 2011
Ron, W6ZQ
------------------------------
Message: 2
Date: Wed, 1 Jun 2011 22:13:51 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: G5500 change voltage supply
To: "Bill Dzurilla" <billdz.geo@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Cc: ea4cyq@xxxxx.xxx
Message-ID: <000d01cc2098$6d28a5c0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Bill, NZ5N
I was looking at the schematic diagram
http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf
As I suspected the transformer has 4 wires coming off from the
primary windings.
In my opinion the transformer has two identical primary windings
to work in parallel from 100 to 117 volt and in series with 220 volt
For 100 or 117 volt connect terminal 0 with terminal 2 and the terminal
1 to terminal 3 so that both primary windings are in parallel and in phase
after that connect the 117 volt line to terminals 0 and 2
For 220 volt connect terminal 1 to terminal 2 and the 220 volt line to
terminals 0 and 3
73" de
i8CVS Domenico
----- Original Message -----
From: "Bill Dzurilla" <billdz.geo@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Cc: <ea4cyq@xxxxx.xxx>
Sent: Wednesday, June 01, 2011 6:53 PM
Subject: [amsat-bb] Re: G5500 change voltage supply
Here is the mod to change Yaesu rotors to 220v:
http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf
But perhaps yours has a different transformer if it uses pin 3 for 117v. In
the mod, pins 0 and 3 are for 220v.
73, Bill NZ5N
> Subject: [amsat-bb] G5500 change voltage supply
>
> I have purchased a G5500. The control box have a
> 117Vac label in the real
> panel. I opened it and a wire is connected through
> the fuse to the terminal
> number 3 of the KT-30 transformer and the other wire
> through the main switch
> to the terminal number 1 of the KT-30 transformer.
>
> I am wondering how I should connect it to work with 220Vac
> in Europe.
>
> Thanks in advance. ea4cyq@xxxxx.xxx
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Wed, 1 Jun 2011 22:34:07 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: G5500 change voltage supply
To: "Bill Dzurilla" <billdz.geo@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Cc: ea4cyq@xxxxx.xxx
Message-ID: <002c01cc209b$419671a0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
Apologise ! I was wrong and please amend my previous message with
with the following one
73" de
i8CVS Domenico
----- Original Message -----
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Bill Dzurilla" <billdz.geo@xxxxx.xxx>; "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Cc: <ea4cyq@xxxxx.xxx>
Sent: Wednesday, June 01, 2011 10:13 PM
Subject: Re: [amsat-bb] Re: G5500 change voltage supply
> Hi Bill, NZ5N
>
> I was looking at the schematic diagram
> http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf
>
> As I suspected the transformer has 4 wires coming off from the
> primary windings.
>
> In my opinion the transformer has two identical primary windings
> to work in parallel from 100 to 117 volt and in series with 220 volt
>
> For 100 or 117 volt jump terminal 0 to terminal 2 and terminal 1
> to terminal 3 so that both primary windings are in parallel and in phase
> after that connect the 117 volt line to terminals 0 and 1 or 2 and 3
>
> For 220 volt jump terminal 1 to terminal 2 and connect the 220 volt
> line to terminals 0 and 3
>
> 73" de
>
> i8CVS Domenico
>
> ----- Original Message -----
> From: "Bill Dzurilla" <billdz.geo@xxxxx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Cc: <ea4cyq@xxxxx.xxx>
> Sent: Wednesday, June 01, 2011 6:53 PM
> Subject: [amsat-bb] Re: G5500 change voltage supply
>
>
> Here is the mod to change Yaesu rotors to 220v:
> http://www.hamcity.com/store/pc/catalog/pdf/220vconversion.pdf
>
> But perhaps yours has a different transformer if it uses pin 3 for 117v.
In
> the mod, pins 0 and 3 are for 220v.
>
> 73, Bill NZ5N
>
> > Subject: [amsat-bb] G5500 change voltage supply
> >
> > I have purchased a G5500. The control box have a
> > 117Vac label in the real
> > panel. I opened it and a wire is connected through
> > the fuse to the terminal
> > number 3 of the KT-30 transformer and the other wire
> > through the main switch
> > to the terminal number 1 of the KT-30 transformer.
> >
> > I am wondering how I should connect it to work with 220Vac
> > in Europe.
> >
> > Thanks in advance. ea4cyq@xxxxx.xxx
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 4
Date: Wed, 01 Jun 2011 14:41:35 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] What Astronauts Photograph
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <50843F53-5A1E-471F-8C34-B61566725082@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
This high definition short is a fascinating document. Narrated by NASA's Dr.
Justin Wilkinson, it shows a tour of planet Earth as seen by astronauts,
explaining what are the places that they first focus on while in orbit.
http://www.youtube.com/watch?v=rj18UQjPpGA
Clint Bradford
clintbradford@xxx.xxx
------------------------------
Message: 5
Date: Wed, 1 Jun 2011 15:30:01 -0700
From: Donald Jacob <wb5eku@xxxxx.xxx>
Subject: [amsat-bb] Re: What Astronauts Photograph
To: Clint Bradford <clintbradford@xxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <BANLkTikvejf10cHSR32TEzgWcK4_BqMv4Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Very nice,
Thanks Clint
Don WB5EKU
On Wed, Jun 1, 2011 at 2:41 PM, Clint Bradford <clintbradford@xxx.xxx> wrote:
> This high definition short is a fascinating document. Narrated by NASA's
Dr. Justin Wilkinson, it shows a tour of planet Earth as seen by astronauts,
explaining what are the places that they first focus on while in orbit.
>
> http://www.youtube.com/watch?v=rj18UQjPpGA
>
>
> Clint Bradford
> clintbradford@xxx.xxx
>
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 6
Date: Wed, 01 Jun 2011 19:44:46 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Fixed! Re: Landwehr 70cm preamp device question?
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Cc: K5OE <k5oe@xxx.xxx>
Message-ID: <qnkn1g00956cfur05nkno3@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hello All,
You gotta love a happy ending ;)
Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice and
coaching with troubleshooting my Landwehr 70 cm preamp.
I took the cover off and applied 12V, and the two relays closed----or did
they?!?
One side looked good, while the other side didn't quite push the "little
white button" enough to make the contacts meet. It was stuck--just a gentle
push with the finger, and I could tell it had become "unstuck." Inserted
back in line, and bingo! It's working just fine.
I have resisted my urges to spray something down in there...figure I can
unstick it the same way another time, should it happen. Looks like the
preamp was made in 1990, based on the dates of the relays.
What I was seeing seemed like it might be a relay issue on one side (could
hear a rise in noise, so the relay at the output side (rig) was working--but
the relay on the input side (antenna) wasn't. So, when powered, the input
relay didn't switch over correctly--what I was seeing now makes sense!
Anyhow, it wasn't the GaAsFET after all.
Thanks again for the help, guys.
73,
Mark N8MH
>>----- Original Message -----
>>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
>>To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
>>Sent: Tuesday, May 31, 2011 8:00 PM
>>Subject: [amsat-bb] Landwehr 70cm preamp device question?
>>
>>> Hello All,
>>>
>>> I have an old Landwehr preamp that apparently uses the MGF1402 device
>>> (does that sound right?). It's not working so I presume it's the
>>> GaAsFET.
>>>
>>> Can the MGF1302 be substituted for the original MGF1402? Or can
>>> anybody recommend another device for the 70 cm Landwehr?
>>>
>>> I need to do something...
>>>
>>> Thanks in advance!
>>>
>>> --
>>> Mark L. Hammond [N8MH]
------------------------------
Message: 7
Date: Thu, 2 Jun 2011 02:42:57 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Fixed! Re: Landwehr 70cm preamp device
question?
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>, "Mark L. Hammond"
<marklhammond@xxxxx.xxx>
Cc: K5OE <k5oe@xxx.xxx>
Message-ID: <000901cc20be$04c387e0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Mark, N8MH and All guys on the list.
I am very happy that you solved the problem on your preamplifier and sinapplications.
Can you take a picture on the inside of preamplifier and send it to me by
email ?
I remember that the owner of Landwehr was a 432 MHz EME'r in the early 1973
and I worked him off the moon but actually I don't remember his call letter
from Sweden.
I believe that he dismitted the production of the above preamplifiers many
years ago.
Tanks
73" de
i8CVS Domenico
----- Original Message -----
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Cc: "i8cvs" <domenico.i8cvs@xxx.xx>; "Vince Fiscus, KB7ADL"
<vlfiscus@xxx.xxx>; "K5OE" <k5oe@xxx.xxx>
Sent: Thursday, June 02, 2011 1:44 AM
Subject: Fixed! Re: Landwehr 70cm preamp device question?
> Hello All,
>
> You gotta love a happy ending ;)
>
> Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice
and coaching with troubleshooting my Landwehr 70 cm preamp.
>
> I took the cover off and applied 12V, and the two relays closed----or did
they?!?
>
> One side looked good, while the other side didn't quite push the "little
white button" enough to make the contacts meet. It was stuck--just a gentle
push with the finger, and I could tell it had become "unstuck." Inserted
back in line, and bingo! It's working just fine.
>
> I have resisted my urges to spray something down in there...figure I can
unstick it the same way another time, should it happen. Looks like the
preamp was made in 1990, based on the dates of the relays.
>
> What I was seeing seemed like it might be a relay issue on one side (could
hear a rise in noise, so the relay at the output side (rig) was working--but
the relay on the input side (antenna) wasn't. So, when powered, the input
relay didn't switch over correctly--what I was seeing now makes sense!
>
> Anyhow, it wasn't the GaAsFET after all.
>
> Thanks again for the help, guys.
>
> 73,
>
> Mark N8MH
>
>
> >>----- Original Message -----
> >>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> >>To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
> >>Sent: Tuesday, May 31, 2011 8:00 PM
> >>Subject: [amsat-bb] Landwehr 70cm preamp device question?
> >>
> >>> Hello All,
> >>>
> >>> I have an old Landwehr preamp that apparently uses the MGF1402 device
> >>> (does that sound right?). It's not working so I presume it's the
> >>> GaAsFET.
> >>>
> >>> Can the MGF1302 be substituted for the original MGF1402? Or can
> >>> anybody recommend another device for the 70 cm Landwehr?
> >>>
> >>> I need to do something...
> >>>
> >>> Thanks in advance!
> >>>
> >>> --
> >>> Mark L. Hammond [N8MH]
>
------------------------------
Message: 8
Date: Wed, 01 Jun 2011 21:33:24 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Fixed! Re: Landwehr 70cm preamp device
question?
To: "i8cvs" <domenico.i8cvs@xxx.xx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Cc: K5OE <k5oe@xxx.xxx>
Message-ID: <qpZS1g00856cfur05pZSEf@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hello Domenico I8CVS,
I did take pictures while I had the cover off :) You can see and download
them here:
https://sites.google.com/site/marklhammond/hamradio
Indeed, they are labeled "COAXIAL RELAYS" as you suspected.
You can also see the "little white button" on the relays that I mentioned
previously.
73!
Mark N8MH
At 02:42 AM 6/2/2011 +0200, i8cvs wrote:
>Hi Mark, N8MH and All guys on the list.
>
>I am very happy that you solved the problem on your preamplifier and since
>you took the cover off I would like to know if the relays are or not
>"COAXIAL RELAYS" or just non constant impedance relays for AC or DC
>applications.
>
>Can you take a picture on the inside of preamplifier and send it to me by
>email ?
>
>I remember that the owner of Landwehr was a 432 MHz EME'r in the early 1973
>and I worked him off the moon but actually I don't remember his call letter
>from Sweden.
>
>I believe that he dismitted the production of the above preamplifiers many
>years ago.
>
>Tanks
>
>73" de
>
>i8CVS Domenico
>
>----- Original Message -----
>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
>To: "Amsat - BBs" <BBs" <amsat-bb@xxxxx.xxx>
>> >>Sent: Tuesday, May 31, 2011 8:00 PM
>> >>Subject: [amsat-bb] Landwehr 70cm preamp device question?
>> >>
>> >>> Hello All,
>> >>>
>> >>> I have an old Landwehr preamp that apparently uses the MGF1402 device
>> >>> (does that sound right?). It's not working so I presume it's the
>> >>> GaAsFET.
>> >>>
>> >>> Can the MGF1302 be substituted for the original MGF1402? Or can
>> >>> anybody recommend another device for the 70 cm Landwehr?
>> >>>
>> >>> I need to do something...
>> >>>
>> >>> Thanks in advance!
>> >>>
>> >>> --
>> >>> Mark L. Hammond [N8MH]
>>
------------------------------
Message: 9
Date: Wed, 01 Jun 2011 22:04:23 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Fixed! Re: Landwehr 70cm preamp device
question?
To: "i8cvs" <domenico.i8cvs@xxx.xx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Cc: K5OE <k5oe@xxx.xxx>
Message-ID: <qq4R1g00A56cfur05q4Rca@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
One more update: the relays can be purchased here!
http://radiodan.com/ted_stuff/tohtsu.htm
73,
Mark N8MH
At 09:33 PM 6/1/2011 -0400, Mark L. Hammond wrote:
>Hello Domenico I8CVS,
>
>I did take pictures while I had the cover off :) You can see and download
them here:
>
>https://sites.google.com/site/marklhammond/hamradio
>
>Indeed, they are labeled "COAXIAL RELAYS" as you suspected.
>
>You can also see the "little white button" on the relays that I mentioned
previously.
>
>73!
>
>Mark N8MH
>
>At 02:42 AM 6/2/2011 +0200, i8cvs wrote:
>>Hi Mark, N8MH and All guys on the list.
>>
>>I am very happy that you solved the problem on your preamplifier and since
>>you took the cover off I would like to know if the relays are or not
>>"COAXIAL RELAYS" or just non constant impedance relays for AC or DC
>>applications.
>>
>>Can you take a picture on the inside of preamplifier and send it to me by
>>email ?
>>
>>I remember that the owner of Landwehr was a 432 MHz EME'r in the early 1973
>>and I worked him off the moon but actually I don't remember his call letter
>>from Sweden.
>>
>>I believe that he dismitted the production of the above preamplifiers many
>>years ago.
>>
>>Tanks
>>
>>73" de
>>
>>i8CVS Domenico
>>
>>----- Original Message -----
>>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
>>To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
>>Cc: "i8cvs" <domenico.i8cvs@xxx.xx>; "Vince Fiscus, KB7ADL"
>><vlfiscus@xxx.xxx>; "K5OE" <k5oe@xxx.xxx>
>>Sent: Thursday, June 02, 2011 1:44 AM
>>Subject: Fixed! Re: Landwehr 70cm preamp device question?
>>
>>
>>> Hello All,
>>>
>>> You gotta love a happy ending ;)
>>>
>>> Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice
>>and coaching with troubleshooting my Landwehr 70 cm preamp.
>>>
>>> I took the cover off and applied 12V, and the two relays closed----or did
>>they?!?
>>>
>>> One side looked good, while the other side didn't quite push the "little
>>white button" enough to make the contacts meet. It was stuck--just a gentle
>>push with the finger, and I could tell it had become "unstuck." Inserted
>>back in line, and bingo! It's working just fine.
>>>
>>> I have resisted my urges to spray something down in there...figure I can
>>unstick it the same way another time, should it happen. Looks like the
>>preamp was made in 1990, based on the dates of the relays.
>>>
>>> What I was seeing seemed like it might be a relay issue on one side (could
>>hear a rise in noise, so the relay at the output side (rig) was working--but
>>the relay on the input side (antenna) wasn't. So, when powered, the input
>>relay didn't switch over correctly--what I was seeing now makes sense!
>>>
>>> Anyhow, it wasn't the GaAsFET after all.
>>>
>>> Thanks again for the help, guys.
>>>
>>> 73,
>>>
>>> Mark N8MH
>>>
>>>
>>> >>----- Original Message -----
>>> >>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
>>> >>To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
>>> >>Sent: Tuesday, May 31, 2011 8:00 PM
>>> >>Subject: [amsat-bb] Landwehr 70cm preamp device question?
>>> >>
>>> >>> Hello All,
>>> >>>
>>> >>> I have an old Landwehr preamp that apparently uses the MGF1402 device
>>> >>> (does that sound right?). It's not working so I presume it's the
>>> >>> GaAsFET.
>>> >>>
>>> >>> Can the MGF1302 be substituted for the original MGF1402? Or can
>>> >>> anybody recommend another device for the 70 cm Landwehr?
>>> >>>
>>> >>> I need to do something...
>>> >>>
>>> >>> Thanks in advance!
>>> >>>
>>> >>> --
>>> >>> Mark L. Hammond [N8MH]
>>>
>
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Wed, 1 Jun 2011 19:33:09 -0700
From: "Rick Tejera" <saguaroastro@xxx.xxx>
Subject: [amsat-bb] Museum Ships Weekend
To: <amsat-bb@xxxxx.xxx>
Message-ID:
<20110602023339.FGOI16474.fed1rmfepo201.cox.net@xxxxxxxxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
All,
This weekend, I'll be operating with the Thunderbird Amateur radio Club from
the anchor & Signal mast of the USS Arizona during Museum Ships weekend.
While most of my operating will be on Sunday on HF, I hope to be able to
work a pass or two on the birds. Not sure what ones but listen for me, I'll
be operating under the club's call W7TBC from grid DM33wk.
I'll try to post a list of passes as the day draws nearer.
For more info on Ships weekend: http://www.nj2bb.org/museum/
Clear Skies
Rick Tejera
Saguaro Astronomy Club
Phoenix, Arizona
<http://www.saguaroastro.org/> www.saguaroastro.org
saguaroastro@xxx.xxx
K7TEJ, AMSAT 38452
------------------------------
Message: 11
Date: Wed, 1 Jun 2011 19:52:19 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Show Low AZ hamfest on Saturday (4 June)
To: amsat-bb@xxxxx.xxx
Message-ID: <40022.56520.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
Just as I got back from Australia a few days ago and have been back
to the office, I will be at another hamfest on Saturday morning. I
will be at the White Mountain Hamfest in Show Low, Arizona. The
hamfest is at the Show Low campus of Northland Pioneer College along
Deuce of Clubs Avenue, hosted by the Kachina Amateur Radio Club.
More information about the hamfest is available at:
http://www.whitemountainhamfest.com/
WD9EWK will be on various satellite passes throughout the hamfest,
which is officially slated to run from 7am to 1pm (1400-2000 UTC).
If I can get into the hamfest site earlier, I will try to work passes
starting around 1300 UTC. Please call WD9EWK if you hear me on the
air. The hamfest is in grid DM44xf.
After the hamfest, I may make a short drive to the DM44/DM54 grid
boundary very close to Show Low for the afternoon and maybe early
evening passes. Depending on when everyone starts shutting down
at the hamfest, I may try for a spot north of the hamfest along
I-40 and look to operate from the DM54/DM55 boundary (a location I
worked from a couple of years ago). Regardless of where I end up
for the afternoon, I will return home Saturday evening.
As with my other hamfests and road trips, I will be happy to confirm
QSOs made with WD9EWK. No need to first send me a QSL card; just an
e-mail with the QSO details will suffice. I will also upload all QSOs
to Logbook of the World.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 12
Date: Wed, 1 Jun 2011 16:52:55 -1000
From: Robert Smith <dukenuke@xxxx.xxx>
Subject: [amsat-bb] AO-51 over Hawaii
To: AMSAT-BB@xxxxx.xxx
Message-ID: <B177F6AD-0A4A-4789-A6A0-CD3C89711788@xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
ALOHA
Nothing heard from AO-51 on 145.150 up, 435.880 down
(hope those are the right freqs). AO-51 was coming out of eclipse
having crossed over the south pacific. High pass.
73
robert, NH7WN
Honolulu
------------------------------
Message: 13
Date: Wed, 1 Jun 2011 22:59:05 -0400
From: "Mark Lunday" <wd4elg@xxxxx.xx.xxx>
Subject: [amsat-bb] Question about duplexers/diplexers
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000901cc20d1$08f80f30$1ae82d90$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
I want to use a single coax for three rigs, feeding to three antennas.
Rig 1 = 6 meters
Rig 2 = 2 meters
Rig 3 = 70 cm
Each has its own antenna at the remote tower.
Question #1: I should use a triplexer at the shack where the three antennas
combine to the single coax, and a triplexer at the antenna where the three
antennas are located. Correct?
Question #2: any recommendations on which is best? I was looking at the
Comet CFX5140
Question #3: can I run 12V through it to power my mast-mount preamps at the
tower?
Mark Lunday, WD4ELG
Greensboro, NC FM06be
wd4elg@xxxx.xxx
http://wd4elg.blogspot.com
http://wd4elg.net
------------------------------
Message: 14
Date: Wed, 1 Jun 2011 20:53:19 -0700 (PDT)
From: Rodney Waln <kc0zhf@xxxxx.xxx>
Subject: [amsat-bb] w1w this weekend
To: amsat-bb@xxxxx.xxx
Message-ID: <136157.68759.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
kc0zhf will be operating satellite's as w1w special events?
as will?others that are doing HF contacts, for the Wyoming state convention
good chance to get WY and DN71 if you need them,
Rodney
kc0zhf
VP shywy ARC
WY amsat area coordinator
------------------------------
Message: 15
Date: Thu, 2 Jun 2011 06:15:52 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Fixed! Re: Landwehr 70cm preamp device
question?
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>, "Mark L. Hammond"
<marklhammond@xxxxx.xxx>
Cc: K5OE <k5oe@xxx.xxx>
Message-ID: <000e01cc20db$c38fa740$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Mark, N8MH
I have seen the pictures of your Landwehr 70 cm preamplifier and I
know very well the model of coax relays used in it.
They are 50 ohm coax relays Tohtsu CX 120 P for printed circuits and can
handle 150 watt pep at 500 MHz with an insertion loss of 0.2 dB and a
crosstallk (insulation) of 35 dB with a VSWR of 1,08 at 1 GHz
don't worry about to clean the contacts because they are very large silver
contacts and you just need to remove the side cover with your fingers
and spry a contact cleaner over it.
I use four of them in my switching four polarizations switcher on a 70 cm
crossed yagi as you can read into the AMSAT Journal March/April and
May/June 2007
Have fun
73" de
i8CVS Domenico
----- Original Message -----
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
To: "i8cvs" <domenico.i8cvs@xxx.xx>; "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Cc: "Vince Fiscus, KB7ADL" <vlfiscus@xxx.xxx>; "K5OE" <k5oe@xxx.xxx>
Sent: Thursday, June 02, 2011 3:33 AM
Subject: Re: Fixed! Re: Landwehr 70cm preamp device question?
> Hello Domenico I8CVS,
>
> I did take pictures while I had the cover off :) You can see and download
them here:
>
> https://sites.google.com/site/marklhammond/hamradio
>
> Indeed, they are labeled "COAXIAL RELAYS" as you suspected.
>
> You can also see the "little white button" on the relays that I mentioned
previously.
>
> 73!
>
> Mark N8MH
>
> At 02:42 AM 6/2/2011 +0200, i8cvs wrote:
> >Hi Mark, N8MH and All guys on the list.
> >
> >I am very happy that you solved the problem on your preamplifier and
since
> >you took the cover off I would like to know if the relays are or not
> >"COAXIAL RELAYS" or just non constant impedance relays for AC or DC
> >applications.
> >
> >Can you take a picture on the inside of preamplifier and send it to me by
> >email ?
> >
> >I remember that the owner of Landwehr was a 432 MHz EME'r in the early
1973
> >and I worked him off the moon but actually I don't remember his call
letter
> >from Sweden.
> >
> >I believe that he dismitted the production of the above preamplifiers
many
> >years ago.
> >
> >Tanks
> >
> >73" de
> >
> >i8CVS Domenico
> >
> >----- Original Message -----
> >From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> >To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
> >Cc: "i8cvs" <domenico.i8cvs@xxx.xx>; "Vince Fiscus, KB7ADL"
> ><vlfiscus@xxx.xxx>; "K5OE" <k5oe@xxx.xxx>
> >Sent: Thursday, June 02, 2011 1:44 AM
> >Subject: Fixed! Re: Landwehr 70cm preamp device question?
> >
> >
> >> Hello All,
> >>
> >> You gotta love a happy ending ;)
> >>
> >> Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the
advice
> >and coaching with troubleshooting my Landwehr 70 cm preamp.
> >>
> >> I took the cover off and applied 12V, and the two relays closed----or
did
> >they?!?
> >>
> >> One side looked good, while the other side didn't quite push the
"little
> >white button" enough to make the contacts meet. It was stuck--just a
gentle
> >push with the finger, and I could tell it had become "unstuck." Inserted
> >back in line, and bingo! It's working just fine.
> >>
> >> I have resisted my urges to spray something down in there...figure I
can
> >unstick it the same way another time, should it happen. Looks like the
> >preamp was made in 1990, based on the dates of the relays.
> >>
> >> What I was seeing seemed like it might be a relay issue on one side
(could
> >hear a rise in noise, so the relay at the output side (rig) was
working--but
> >the relay on the input side (antenna) wasn't. So, when powered, the
input
> >relay didn't switch over correctly--what I was seeing now makes sense!
> >>
> >> Anyhow, it wasn't the GaAsFET after all.
> >>
> >> Thanks again for the help, guys.
> >>
> >> 73,
> >>
> >> Mark N8MH
> >>
> >>
> >> >>----- Original Message -----
> >> >>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> >> >>To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
> >> >>Sent: Tuesday, May 31, 2011 8:00 PM
> >> >>Subject: [amsat-bb] Landwehr 70cm preamp device question?
> >> >>
> >> >>> Hello All,
> >> >>>
> >> >>> I have an old Landwehr preamp that apparently uses the MGF1402
device
> >> >>> (does that sound right?). It's not working so I presume it's the
> >> >>> GaAsFET.
> >> >>>
> >> >>> Can the MGF1302 be substituted for the original MGF1402? Or can
> >> >>> anybody recommend another device for the 70 cm Landwehr?
> >> >>>
> >> >>> I need to do something...
> >> >>>
> >> >>> Thanks in advance!
> >> >>>
> >> >>> --
> >> >>> Mark L. Hammond [N8MH]
> >>
>
------------------------------
Message: 16
Date: Wed, 01 Jun 2011 23:06:08 -0800
From: "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Fixed! Re: Landwehr 70cm preamp device
question?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <201106020706.p52769dB096220@xxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I was not aware of these little pcb coax relays. I think one could
make a neat CP reversal switch using them on a pcb that could handle
normal satellite RF levels (<100w) at a reasonable cost. Much better
than what is used on KLM CP antennas.
One could make switching preamps using two of them with any preamp
------------------------------------------------------------------------
I use a couple CX-600NL in my 2m-eme system for polarity switching,
but do not have enough isolation (48-dB) for preamps when
transmitting 1000w (60dBm). So I use two Narda relays with 80-dB
isolation. I am going to use one of the CX-600NL for 6m-eme
switching 1100w where isolation is 60-dB.
73, Ed - KL7uW
At 05:33 PM 6/1/2011, Mark L. Hammond wrote:
>Hello Domenico I8CVS,
>
>I did take pictures while I had the cover off :) You can see and
>download them here:
>
>https://sites.google.com/site/marklhammond/hamradio
>
>Indeed, they are labeled "COAXIAL RELAYS" as you suspected.
>
>You can also see the "little white button" on the relays that I
>mentioned previously.
>
>73!
>
>Mark N8MH
>
>At 02:42 AM 6/2/2011 +0200, i8cvs wrote:
> >Hi Mark, N8MH and All guys on the list.
> >
> >I am very happy that you solved the problem on your preamplifier and since
> >you took the cover off I would like to know if the relays are or not
> >"COAXIAL RELAYS" or just non constant impedance relays for AC or DC
> >applications.
> >
> >Can you take a picture on the inside of preamplifier and send it to me by
> >email ?
> >
> >I remember that the owner of Landwehr was a 432 MHz EME'r in the early 1973
> >and I worked him off the moon but actually I don't remember his call letter
> >from Sweden.
> >
> >I believe that he dismitted the production of the above preamplifiers many
> >years ago.
> >
> >Tanks
> >
> >73" de
> >
> >i8CVS Domenico
> >
> >----- Original Message -----
> >From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> >To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
> >Cc: "i8cvs" <domenico.i8cvs@xxx.xx>; "Vince Fiscus, KB7ADL"
> ><vlfiscus@xxx.xxx>; "K5OE" <k5oe@xxx.xxx>
> >Sent: Thursday, June 02, 2011 1:44 AM
> >Subject: Fixed! Re: Landwehr 70cm preamp device question?
> >
> >
> >> Hello All,
> >>
> >> You gotta love a happy ending ;)
> >>
> >> Thanks to I8CVS, Domenico; Vince, KB7ADL; and Jerry, K5OE for the advice
> >and coaching with troubleshooting my Landwehr 70 cm preamp.
> >>
> >> I took the cover off and applied 12V, and the two relays closed----or did
> >they?!?
> >>
> >> One side looked good, while the other side didn't quite push the "little
> >white button" enough to make the contacts meet. It was stuck--just a
gentle
> >push with the finger, and I could tell it had become "unstuck." Inserted
> >back in line, and bingo! It's working just fine.
> >>
> >> I have resisted my urges to spray something down in there...figure I can
> >unstick it the same way another time, should it happen. Looks like the
> >preamp was made in 1990, based on the dates of the relays.
> >>
> >> What I was seeing seemed like it might be a relay issue on one side
(could
> >hear a rise in noise, so the relay at the output side (rig) was
working--but
> >the relay on the input side (antenna) wasn't. So, when powered, the input
> >relay didn't switch over correctly--what I was seeing now makes sense!
> >>
> >> Anyhow, it wasn't the GaAsFET after all.
> >>
> >> Thanks again for the help, guys.
> >>
> >> 73,
> >>
> >> Mark N8MH
> >>
> >>
> >> >>----- Original Message -----
> >> >>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> >> >>To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
> >> >>Sent: Tuesday, May 31, 2011 8:00 PM
> >> >>Subject: [amsat-bb] Landwehr 70cm preamp device question?
> >> >>
> >> >>> Hello All,
> >> >>>
> >> >>> I have an old Landwehr preamp that apparently uses the MGF1402 device
> >> >>> (does that sound right?). It's not working so I presume it's the
> >> >>> GaAsFET.
> >> >>>
> >> >>> Can the MGF1302 be substituted for the original MGF1402? Or can
> >> >>> anybody recommend another device for the 70 cm Landwehr?
> >> >>>
> >> >>> I need to do something...
> >> >>>
> >> >>> Thanks in advance!
> >> >>>
> >> >>> --
> >> >>> Mark L. Hammond [N8MH]
> >>
>
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-testing*, 3400-?
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
======================================
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 300
****************************************
Read previous mail | Read next mail
| |
