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CX2SA > SATDIG 01.04.08 08:00l 444 Lines 14815 Bytes #999 (0) @ WW
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Today's Topics:
1. Question about Frequencies to use on VO-52 (Ronald Nutter)
2. Re: ARR pre amp Query (Ronald Nutter)
3. Re: ARR pre amp Query (Bill Dzurilla)
4. Re: ARR pre amp Query (Jeff Mock)
5. 2401/144 down conveter and antenna questions (CLAUDIA PIRKL)
6. Re: Preamp for a Mobile Application (Jeff Mock)
7. Re: ARR pre amp Query (Alan)
8. Re: ARR pre amp Query (John W Lee)
9. Re: Preamp for a Mobile Application (John W Lee)
----------------------------------------------------------------------
Message: 1
Date: Mon, 31 Mar 2008 11:47:51 -0500
From: Ronald Nutter <rnutter(AT)networkref.com>
Subject: [amsat-bb] Question about Frequencies to use on VO-52
To: amsat-bb(AT)amsat.org
Message-ID: <47F115B7.9040702(AT)networkref.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I am trying to learn how to use the SSB birds. What are the "starting"
frequencies that most use for uplink and downlink ? If I understand
this correctly, you will leave the uplink set and then only tweak the
downlink ?
Thanks,
Ron
KA4KYI
------------------------------
Message: 2
Date: Mon, 31 Mar 2008 11:46:16 -0500
From: Ronald Nutter <rnutter(AT)networkref.com>
Subject: [amsat-bb] Re: ARR pre amp Query
To: w0dxz(AT)aol.com
Cc: amsat-bb(AT)amsat.org
Message-ID: <47F11558.1040307(AT)networkref.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I have a couple of these. I think they are meant for "permanent"
installation. What I did was to create a wiring harness of sorts. I
soldered one wire to a alligator clip and one to a soldering lug. The
soldering lug goes underneath a screw. The alligator clip goes to the
other "pin".
Ron
w0dxz(AT)aol.com wrote:
> I am thinking aobut ordering an ARR pre amp for 432,,, I see the pin for 12V
DC,,, what type of connector does this take, or do you have to solder the?
wire to the pin? That seems a bit crude.
> Canby one use the ARR product, and how do you connect the 12V to it?
> Bob
> W0DXZ
> _______________________________________________
> 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: 3
Date: Mon, 31 Mar 2008 10:21:48 -0700 (PDT)
From: Bill Dzurilla <billdz.geo(AT)yahoo.com>
Subject: [amsat-bb] Re: ARR pre amp Query
To: amsat-bb(AT)amsat.org
Message-ID: <208175.64937.qm(AT)web51107.mail.re2.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
The more expensive "mast mounted" versions
(MSP432VDG-160, $240 and MSP432VDG-25, $190) come with
a power connector, but the RF switched SP432VDG, $120
(25w rating) does not. You have to solder or clip the
wire for the +13vdc to the top of a feedthrough, and
the wire for the -13vdc to a solder lug attached to a
screw on the chassis. Yes, a bit crude. See
http://www.advancedreceiver.com/page37.html
By the way, the "RF switched" preamps come standard
with BNC connectors. You can buy them with N
connectors for an extra $10, but they will not sell
them with UHF connectors (SO-239). The "mast mounted"
versions come standard with N connectors.
73, Bill NZ5N
>>Hi Bob,
The Advanced Receiver pre-amp that I purchased
(MSP432VDG-160) came with the
power connector. You will need to solder the wires to
the connector. I found
some old RG-58 that I used to run the power to it.
Very nice pre-amp by the way.
73, Jeff
K7WIN
----- Original Message -----
From: <w0dxz(AT)aol.com>
To: <amsat-bb(AT)amsat.org>
Sent: Monday, March 31, 2008 8:04 AM
Subject: [amsat-bb] ARR pre amp Query
>I am thinking aobut ordering an ARR pre amp for
432,,, I see the pin for
>12V DC,,, what type of connector does this take, or
do you have to solder
>the? wire to the pin? That seems a bit crude.
> Canby one use the ARR product, and how do you
connect the 12V to it?
______________________________________________________________________________
______
No Cost - Get a month of Blockbuster Total Access now. Sweet deal for Yahoo!
users and friends.
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------------------------------
Message: 4
Date: Mon, 31 Mar 2008 10:42:32 -0700
From: Jeff Mock <jeff(AT)mock.com>
Subject: [amsat-bb] Re: ARR pre amp Query
To: amsat-bb(AT)amsat.org, w0dxz(AT)aol.com
Message-ID: <47F12288.2070109(AT)mock.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
You can also power it from the coax to the radio. If you have something
like an Icom 910 it's very nice, the preamp button on the radio will put
12v on the coax and power the ARR preamp or bypass the preamp as you
like. You don't need to use the power connector.
jeff
AD6EO
K7WIN - Jeff wrote:
> Hi Bob,
>
> The Advanced Receiver pre-amp that I purchased (MSP432VDG-160) came with the
> power connector. You will need to solder the wires to the connector. I found
> some old RG-58 that I used to run the power to it.
>
> Very nice pre-amp by the way.
>
> 73, Jeff
> K7WIN
>
>
> ----- Original Message -----
> From: <w0dxz(AT)aol.com>
> To: <amsat-bb(AT)amsat.org>
> Sent: Monday, March 31, 2008 8:04 AM
> Subject: [amsat-bb] ARR pre amp Query
>
>
>> I am thinking aobut ordering an ARR pre amp for 432,,, I see the pin for
>> 12V DC,,, what type of connector does this take, or do you have to solder
>> the? wire to the pin? That seems a bit crude.
>> Canby one use the ARR product, and how do you connect the 12V to it?
>> Bob
>> W0DXZ
>> _______________________________________________
>> 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
>>
>>
>
>
> _______________________________________________
> 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: Mon, 31 Mar 2008 11:50:35 -0600
From: "CLAUDIA PIRKL" <timn5ki(AT)dishmail.net>
Subject: [amsat-bb] 2401/144 down conveter and antenna questions
To: AMSAT-BB(AT)amsat.org
Message-ID:
<3d424a230803311050g282b870dg4ca96bd5e808b029(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Hello all. I found a 2401/144 down converter on the internet but when it
came in the mail there was no info with it. It is a TranSystem Model
AIDC-3733 and I think it came from K5GNA.
I removed one cover (antenna on left/144 IF facing me) and found a wire with
one end not connected. I realize it needs some DC volts to operate but how
much and where it needs to be brought in. Does any one have any info to
help me out?
On the internet there a few helix antenna designs for 2401. I found a piece
of 1" PVC and some AL. ground wire. I wrapped the wire around the PVC and
came up with the 4cm dia. the article talked about. But, in another article
(435 Mhz) it was mentioned the PVC was very lossy. What do you think??
Thanks for any help!!
Tim N5KI EM65
------------------------------
Message: 6
Date: Mon, 31 Mar 2008 10:52:38 -0700
From: Jeff Mock <jeff(AT)mock.com>
Subject: [amsat-bb] Re: Preamp for a Mobile Application
To: AMSAT-BB <amsat-bb(AT)amsat.org>
Message-ID: <47F124E6.8070200(AT)mock.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
It's not clear that a preamp will improve your reception. The 2720H has
a pretty sensitive receiver. The preamp will help you if the noise
figure of the preamp is better than the noise figure of your radio.
It's not clear to me that you can make much of an improvement here.
I have a preamp on the masthead at home, but I have a long feedline from
my receiver to the antenna, I have about 7db of loss from the antenna to
the radio at 70cm and I get a noticeable improvement with a preamp. The
main job of my preamp is to overcome the loss of the feedline, otherwise
the preamp is not that much better than the radio.
jeff
AD6EO
Kent R. Frazier wrote:
> Hi all,
>
> I am really enjoying the satellite aspect of the hobby and have enjoyed the
> contacts I have made with my Icom IC-2720H with a 19" whip antenna from my
> vehicle. I have seen talk recently of using a preamp to improve the
> reception. From what I've read and understand, it appears that a "switching"
> preamp is needed for a setup using only one antenna for Tx and Rx such as
> mine. Is this correct?
>
> It also appears that most of the preamps are mast mounted. Since this would
> not be an option for me can the preamp be put near the transceiver? Are
> there any issues that result of doing so?
>
> Lastly, what preamp(s) would you recommend for an application such as mine?
>
>
> Thanks,
>
> Kent
>
------------------------------
Message: 7
Date: Mon, 31 Mar 2008 14:03:10 -0500
From: "Alan" <ve4yz(AT)mts.net>
Subject: [amsat-bb] Re: ARR pre amp Query
To: "'Bill Dzurilla'" <billdz.geo(AT)yahoo.com>, <amsat-bb(AT)amsat.org>
Message-ID: <000f01c89361$dcea1be0$0602a8c0(AT)athlon>
Content-Type: text/plain; charset="us-ascii"
Very timely discussion for me as the snow sloooowwly disappears and the
return of the Canada geese and robins signals the time for tower work :-)
Some previous comments suggest that a preamp near the rig is not
significant, but, I suggest otherwise as my Ft-847 internal preamps can make
a significant difference in RX. Anecdotal, not empirical, but I can hear
the diff at the push of a button.
Now, I am consider mast mounted preamps as an alternative to my FT-847
internal preamps for one of my sites. I run Landwehr VHF and UHF preamps at
2 other locations and they are terrific! They are also almost 20 years old
and no longer available :-(
The preamps on the AR2 site look like what I could use.
My questions are... Is the sequencer
http://www.advancedreceiver.com/page20.html
really necessary or recommended when using the MSP432VD-25 or MSP144VDG-25
preamps? My first thought is NO. 15-20 years of use of 4 Landwehr preamps
without a sequencer is my rational.
Finally, does anyone have a nice "warranty voiding" hack to get around the
these different power connectors we see on indoor preamps and down
converters such as my KEPS http://www.keps.it/images/13lnc72db_m.jpg ?
Instead of soldering to the pin and a ground lug
http://picasaweb.google.com/ve4yz.alan/24Ghz/photo#5172119570416133618
Something as simple as removing the connector from the case and running a
cable through the remaining hole, soldered internally with something like
Anderson Power Poles at the other end for 12VDC????? I'm going to do it one
day, but would rather have someone else confirm that it would work without
adversely effecting performance characteristics. No guts; no glory here.
Thanks for any feedback
73, Alan VE4YZ
EN19kw
AMSAT LM 2352
http://www.mts.net/~ve4wsc/
AMSAT A-485
------------------------------
Message: 8
Date: Mon, 31 Mar 2008 09:38:09 -0800
From: John W Lee <k6yk(AT)juno.com>
Subject: [amsat-bb] Re: ARR pre amp Query
To: w0dxz(AT)aol.com, amsat-bb(AT)AMSAT.org
Message-ID: <20080331.115638.1836.0.k6yk(AT)juno.com>
Content-Type: text/plain; charset=us-ascii
Bob,
There's a ground lug and small pin on the preamp.
I put a female pin on the wire for the 12 volt connection and
soldered on the ground. I have 2 of those and they work great.
Even run them from a HT battery when operating portable, maybe
9.6 volts or so, works fine.
73
John K6YK
On Mon, 31 Mar 2008 11:04:00 -0400 w0dxz(AT)aol.com writes:
> I am thinking aobut ordering an ARR pre amp for 432,,, I see the pin
> for 12V DC,,, what type of connector does this take, or do you have
> to solder the? wire to the pin? That seems a bit crude.
> Canby one use the ARR product, and how do you connect the 12V to
> it?
> Bob
> W0DXZ
>
------------------------------
Message: 9
Date: Mon, 31 Mar 2008 09:42:48 -0800
From: John W Lee <k6yk(AT)juno.com>
Subject: [amsat-bb] Re: Preamp for a Mobile Application
To: billdz.geo(AT)yahoo.com, amsat-bb(AT)AMSAT.org
Message-ID: <20080331.115638.1836.1.k6yk(AT)juno.com>
Content-Type: text/plain; charset=us-ascii
Guys,
Well, Those SP432VDG's work REAL GOOD for
mobile operation. My mobile has a quarter wave whip
(6.5 inches long) for receiving on UHF. Those low-noise
preamps DO help a lot. And if you like to use a small beam to
receive with, then the preamp will help that, too. I mean you
get a LOUD signal that you can actually copy thru the whole
pass instead of "in and out" and lots of "no copy" time. And
of course the noise level is still zero or near it.
This is not just an opinion, this is tried and true. I have logged
thousands of contacts on the FM birds while mobile and portable
with pretty minimal rigs.
73,
John K6YK
On Mon, 31 Mar 2008 07:01:03 -0700 (PDT) Bill Dzurilla
<billdz.geo(AT)yahoo.com> writes:
> Kent,
>
> Never tried it, but I doubt a preamp would be worth
> the expense if mounted at the rig in a mobil set-up.
> I assume the feedline is only 10' or so. The preamp
> helps most when the feedline is lengthy, especially if
> cheap coax is used.
>
> If you want to try a switching preamp, the ARR
> SP432VDG is a good one, see
> http://www.advancedreceiver.com/page7.html
>
> For about the same price, you could buy an Arrow
> handheld yagi antenna, which would substantially
> improve both reception and transmission. See
> http://www.arrowantennas.com/146-437.html , although
> if the rig is fixed inside your car if might not be
> convenient to hold the Arrow, unless your mike cord is
> long enough so you can stand outside the car.
>
> If you are limited to operating from the car, try
> driving to a hilltop or somewhere with a clear view
> from horizon to horizon.
>
> 73, Bill NZ5N
>
>
>
>
_________________________________________________________________________
___________
> Like movies? Here's a limited-time offer: Blockbuster Total Access
> for one month at no cost.
> http://tc.deals.yahoo.com/tc/blockbuster/text4.com
> _______________________________________________
> 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
>
>
------------------------------
_______________________________________________
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!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 3, Issue 161
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