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CX2SA > SATDIG 21.03.08 23:00l 424 Lines 12927 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Icom IC2720H Full Duplex (Kent R. Frazier)
2. IEEE: Last interview with Arthur C Clarke (Arthur Feller)
3. Re: KiwiSAT Experimental package (JA0CQP)
4. Replacement KLM 2M-14C matching harness coax? (i8cvs)
5. F.S. (Jim Randall)
6. Visable Iss pass (Rick Elverum)
7. Re: Visable Iss pass (Nate Duehr)
8. Re: Icom IC2720H Full Duplex (Wayne N5WD)
9. Re: Icom IC2720H Full Duplex (G8IFF/KC8NHF)
10. Yaesu G500 bearings, KLM antennas (KYLE YOKSH)
11. Re: F.S. (Dave Guimont)
----------------------------------------------------------------------
Message: 1
Date: Thu, 20 Mar 2008 16:35:51 -0500
From: "Kent R. Frazier" <k5knt(AT)amsat.org>
Subject: [amsat-bb] Icom IC2720H Full Duplex
To: AMSAT-BB <amsat-bb(AT)amsat.org>
Message-ID:
<7caa889a0803201435u40f23e22t9e62fa9adcb21708(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
I was trying to work AO-27 this afternoon.
Maybe I'm wrong, but I thought the IC2720H would operate in "Full Duplex",
i.e. being able to transmit on one band while simultaneously receiving on
the other. I had my left band set on the uplink of 145.850 and the right
band set to the downlink of 436.795 (adjusting for doppler). I was able to
hear the downlink just fine. When I tried to transmit on the left band (set
as the main band) the audio on the right band would mute. Thus, I was unable
to hear if I was hitting the satellite. I have the sub-band mute feature set
to off.
Is there anyone in the group that uses this radio that could help me out?
Thanks,
Kent
--
Kent R. Frazier, K5KNT
------------------------------
Message: 2
Date: Thu, 20 Mar 2008 17:37:29 -0400
From: Arthur Feller <afeller(AT)ieee.org>
Subject: [amsat-bb] IEEE: Last interview with Arthur C Clarke
To: amsat-bb(AT)amsat.org, amsat-edu(AT)amsat.org
Message-ID: <0JY1006M8TJZF7U1(AT)vms040.mailsrvcs.net>
Content-Type: text/plain; charset="us-ascii"; format=flowed
See: http://spectrum.ieee.org/mar08/6075
73, art.....
Life is short. Be swift to love! Make haste to be kind!
- Henri Frederic Amiel, philosopher and writer (1821-1881)
------------------------------
Message: 3
Date: Fri, 21 Mar 2008 08:24:04 +0900
From: "JA0CQP" <ja0cqp(AT)po30.lcv.ne.jp>
Subject: [amsat-bb] Re: KiwiSAT Experimental package
To: <amsat-bb(AT)amsat.org>
Message-ID: <001801c88ae1$80bf1420$0300a8c0(AT)tk4>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Although I do not know real meaning of "rippa" which Andrew wrote,
just for your information from another point of view.
"rippa" or "Rippa" is very common word in Japanese.
This word is used like "He is rippa", that means "He is great (man)"
on the business or human life.
I wish the KiwiSAT will be "Rippa na Satellite" (Great successful
satellite)
de JA0CQP
Toyo
----- Original Message -----
From: "G8IFF/KC8NHF" <nigel(AT)ngunn.net>
To: "Andrew Rich" <vk4tec(AT)people.net.au>
Cc: <amsat-bb(AT)amsat.org>
Sent: Friday, March 21, 2008 1:17 AM
Subject: [amsat-bb:103892] Re: KiwiSAT Experimental package
> What's a rippa?
>
> Andrew Rich wrote:
>> ICOM 910 H is a rippa
>>
>>
------------------------------
Message: 4
Date: Fri, 21 Mar 2008 00:26:04 +0100
From: "i8cvs" <domenico.i8cvs(AT)tin.it>
Subject: [amsat-bb] Replacement KLM 2M-14C matching harness coax?
To: "AMSAT-BB" <amsat-bb(AT)amsat.org>
Message-ID: <006f01c88ae1$c4b610c0$0201a8c0(AT)tin.it>
Content-Type: text/plain; charset="iso-8859-1"
Hi Tom, N9RPQ
All messages with the requested pictures sent to you via your email address
bounced back to me.
Do you have another email address ?
73" de
i8CVS Domenico
----- Original Message -----
From: Paul Gabel
To: i8cvs
Sent: Wednesday, March 19, 2008 9:20 PM
Subject: Re: [amsat-bb] Fw: Replacement KLM 2M-14C matching harness coax?
i8CVS Domenico I have the same antenna please send me the pics showing the
info thanks Tom N9RPQ 73
i8cvs <domenico.i8cvs(AT)tin.it> wrote:
----- Original Message -----
From: "Ken Swaggart"
To: "AMSAT-BB"
Sent: Wednesday, March 19, 2008 12:49 AM
Subject: [amsat-bb] Replacement KLM 2M-14C matching harness coax?
> It's time to rebuild my Oscar 10 vintage KLM 2M-14C matching harness.
There
> are no markings on the original harness but it has teflon insulation and I
> assume it is 75 Ohm. Anyone have the replacement info? I'd prefer to use
> teflon cable. The antenna manual doesn't describe the matching harness.
>
> Tnx,
> Ken, W7KKE
>
Hi Ken, W7KKE
The balun across each folded dipole is made with 50 ohm RG-303 teflon
insulated coax cable, velocity factor 0.694
The phasing coupling harness is made with two matching lines of 75 ohm
RG-302 teflon insulated coax cable, velocity factor 0.694
The polarity switcher is a relay Guardian Electric WJ MFG Corp 1365 series
12 V dc A410-364385-00
Due of the lenght of relay the lenght of coax RG-302 going from relay to the
50 ohm unbalance feed is critical to be 1/4 electrical wave long beginning
from the folded dipole so that use only 75 ohm RG-302 or any other type
of 75 ohm teflon insulated coax with the same lenght as the original one.
For water protection it is necessary to enclose the PCB and relay into an
additional plastic box and if anyone is interested on it I can send a set of
pics showing my own installation.
73" de
i8CVS Domenico
_______________________________________________
Sent via AMSAT-BB(AT)amsat.org. 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: 5
Date: Thu, 20 Mar 2008 23:39:02 -0400
From: "Jim Randall" <jrand1(AT)erols.com>
Subject: [amsat-bb] F.S.
To: "Amsat NA" <amsat-bb(AT)amsat.org>
Message-ID: <004001c88b05$1b4b0da0$1100a8c0(AT)MASTER>
Content-Type: text/plain; charset="iso-8859-1"
Looking for a new home for a brand new,in box with warranty
Icom IC910H.Never been used.Would like to sell before going on Ebay. $950.00.
Jim
n3ydt
------------------------------
Message: 6
Date: Thu, 20 Mar 2008 05:21:30 -0700 (PDT)
From: Rick Elverum <builderick2004(AT)yahoo.com>
Subject: [amsat-bb] Visable Iss pass
To: AMSAT-BB(AT)amsat.org
Message-ID: <871122.53541.qm(AT)web55509.mail.re4.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
I saw the ISS pass from North west to South east this morning about 6:00 am
local
At 2 miles high and with a snowy winter I have missed any possibility of
viewing it with the old eyes. Today was different.
It was a beautiful site and so bright- traveling very fast about a 85 degree
pass.
Rick de KB0VBZ
---------------------------------
Never miss a thing. Make Yahoo your homepage.
------------------------------
Message: 7
Date: Fri, 21 Mar 2008 01:22:38 -0600
From: Nate Duehr <nate(AT)natetech.com>
Subject: [amsat-bb] Re: Visable Iss pass
To: Rick Elverum <builderick2004(AT)yahoo.com>
Cc: AMSAT-BB(AT)amsat.org
Message-ID: <D770A482-4553-4FEE-8F44-22A25F4FF904(AT)natetech.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
On Mar 20, 2008, at 6:21 AM, Rick Elverum wrote:
> I saw the ISS pass from North west to South east this morning about
> 6:00 am local
> At 2 miles high and with a snowy winter I have missed any
> possibility of viewing it with the old eyes. Today was different.
> It was a beautiful site and so bright- traveling very fast about a
> 85 degree pass.
> Rick de KB0VBZ
Rick I just mentioned you this week here on the BB... did you see
that? Someone asked about how to find AMSAT folks in the Colorado
Front Range...
We all miss your Colorado AMSAT Net! Looking forward to hearing the
net on the air again someday...
Glad to see you're still working the sats, even if it's just eyeball
QSO's with them! (GRIN)
--
Nate Duehr, WY0X
nate(AT)natetech.com
------------------------------
Message: 8
Date: Fri, 21 Mar 2008 10:10:31 -0500
From: Wayne N5WD <n5wd(AT)charter.net>
Subject: [amsat-bb] Re: Icom IC2720H Full Duplex
To: "Kent R. Frazier" <k5knt(AT)amsat.org>, <AMSAT-BB(AT)amsat.org>
Message-ID: <2008321101031.732976(AT)HPPAV2>
Content-Type: text/plain; charset="us-ascii"
On Thu, 20 Mar 2008 16:35:51 -0500, Kent K5KNT wrote:
> I was trying to work AO-27 this afternoon...I thought the
> IC2720H would operate in "Full Duplex",..transmit on one band while
> simultaneously receiving on the other. I had my left band set on
> the uplink of 145.850 and the right band set to the downlink of
> 436.795 (adjusting for doppler). I was able to hear the downlink
> just fine. When I tried to transmit on the left band (set as the
> main band) the audio on the right band would mute. Thus, I was
> unable to hear if I was hitting the satellite. I have the sub-band
> mute feature set to off.
I've used my IC-2720 to crossband through ISS, transmitting on the
right band on 437.800 and receiving VHF on the left band on 145.800
without problem, but haven't tried the reverse like you are trying.
Have you tried swapping the bands to see if the problem continues?
73 Wayne N5WD
----------------------------------------------------------------------
R. Wayne Day N5WD n5wd(AT)charter.net
IRLP Node 3997 -> Lake Worth, Texas
Fort Worth, Texas USA
----------------------------------------------------------------------
------------------------------
Message: 9
Date: Fri, 21 Mar 2008 15:36:40 +0000
From: G8IFF/KC8NHF <nigel(AT)ngunn.net>
Subject: [amsat-bb] Re: Icom IC2720H Full Duplex
To: AMSAT-BB(AT)amsat.org
Message-ID: <47E3D608.3050608(AT)ngunn.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Does the radio mute the audio or is the UHF receiver blocked by the
transmitter's third harmonic?
> On Thu, 20 Mar 2008 16:35:51 -0500, Kent K5KNT wrote:
>
>> I was trying to work AO-27 this afternoon...I thought the
>> IC2720H would operate in "Full Duplex",..transmit on one band while
>> simultaneously receiving on the other. I had my left band set on
>> the uplink of 145.850 and the right band set to the downlink of
>> 436.795 (adjusting for doppler). I was able to hear the downlink
>> just fine. When I tried to transmit on the left band (set as the
>> main band) the audio on the right band would mute. Thus, I was
>> unable to hear if I was hitting the satellite. I have the sub-band
>> mute feature set to off.
>>
------------------------------
Message: 10
Date: Fri, 21 Mar 2008 11:36:58 -0700 (PDT)
From: KYLE YOKSH <yokshs(AT)sbcglobal.net>
Subject: [amsat-bb] Yaesu G500 bearings, KLM antennas
To: amsat-bb(AT)amsat.org
Message-ID: <383545.17041.qm(AT)web82707.mail.mud.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Hello,
I've got a KR-500 and G500a rotor that need a good servicing. I've found a
lot of great info in the archives that will help me, but still have a few
questions..
I've read that the original bearings were steel, and begin to rust almost
immediately after installation. Can anyone suggest a better quality bearing,
and perhaps a source and part number?
I've also read that the bearing cages are subject to failure, and some folks
prefer to ditch them altogether.
I'm also curious if anyone has any suggestions to optimize my old KLM
crossed yagis?
I use a KLM 2m14c and 43518c, and they seem to work fairly well, but are not
exactly
top performers. I've never opened the polarization switcher units on either
antenna, but suppose I might want to clean the relay contacts?
Since my tower must be tilted over to service the rotator and antennas, I'd
like to get several years of service out of this gear.
Thank you for any help.
73,
Kyle
K0KN
------------------------------
Message: 11
Date: Fri, 21 Mar 2008 12:59:25 -0700
From: Dave Guimont <dguimon1(AT)san.rr.com>
Subject: [amsat-bb] Re: F.S.
To: "Jim Randall" <jrand1(AT)erols.com>
Cc: amsat-bb(AT)amsat.org
Message-ID:
<20080321195926.UTTA28190.cdptpa-omta02.mail.rr.com(AT)Dave.san.rr.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed
>Looking for a new home for a brand new,in box with warranty
>Icom IC910H.Never been used.Would like to sell before going on Ebay. $950.00.
>
Jim, that's a good price for a very good radio...I've had mine for
several years, compared it with the two other popular brands, and it
surpassed them both after testing in all modes, with both HEO's and
LEO's...using immediate coax switching to compare performance...
73, Dave, WB6LLO
dguimon1(AT)san.rr.com
Disagree: I learn....
Pulling for P3E...
------------------------------
_______________________________________________
Sent via amsat-bb(AT)amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
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End of AMSAT-BB Digest, Vol 3, Issue 146
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