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CX2SA > SATDIG 01.09.08 00:44l 329 Lines 11700 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V3 441
Path: IZ3LSV<IK2XDE<F5GOV<CX2SA
Sent: 080831/2241Z @:CX2SA.LAV.URY.SA #:29980 [Minas] FBB7.00e $:29980_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Radio setups (Anthony Monteiro)
2. preamps (Michael Heim)
3. Re: apparent beacon on 435.300 (John W Lee)
4. Re: preamps (Michael Heim)
5. Re: Radio setups (Patrick STODDARD (WD9EWK/VA7EWK))
----------------------------------------------------------------------
Message: 1
Date: Sun, 31 Aug 2008 11:08:43 -0400
From: Anthony Monteiro <aa2tx(AT)comcast.net>
Subject: [amsat-bb] Re: Radio setups
To: <AMSAT-BB(AT)amsat.org>
Message-ID: <20080831151051.88VFApB00ECRP(AT)mailbox5.ucsd.edu>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 10:12 AM 8/31/2008, Andrew Glasbrenner wrote:
>Unless you are exceptionally long winded, not adjusting the frequency during
>transmit really isn't an issue. The 897 and 817 will work just fine, with or
>without computer control.
...
> >I could be wrong (I hope not) but the FT-8x7 is not suitable for TX as you
> > can't adjust the TX frequency while transmitting
...
> >> I'll be using a Yaesu FT-857D for transmit and an FT-718ND for receive.
Dear Friends,
I will second Drew's comment and would also note that
the now ancient InstantTune could run a single FT-817
(or FT857) by adjusting the TX VFO while receiving
so you could dispense with the second radio.
This is not the best since you can't tell how well you
are getting into the satellite but it is much simpler
when you want to run mobile or portable operation.
I do not know if one of the current programs will do this
but it isn't hard to implement.
73,
Tony AA2TX
------------------------------
Message: 2
Date: Sun, 31 Aug 2008 09:59:33 -0700 (PDT)
From: Michael Heim <kd0ar(AT)sbcglobal.net>
Subject: [amsat-bb] preamps
To: AMSAT-BB(AT)amsat.org
Message-ID: <454944.84811.qm(AT)web81503.mail.mud.yahoo.com>
Content-Type: text/plain; charset=us-ascii
A recent post mentioned the need for a preamp. This reminded me of something
I want to share with the group.
Station here consists of an FT-817ND and an FT-857D. The 817 is pretty
sensitive on UHF, but the 857 is a little lacking in comparison.
I was looking for a preamp online that would help, especially with the 857. I
went and ordered a Ramsey PR40. I figured for $15 I couldnt go wrong.
Although its not a GaAs device, (its a bipolar), it works pretty well. I
actually didnt want a GaAs because I was afraid of blowing the device anyway,
being I'm running a homebrew "Arrow style" antenna on a fixed elevation mast,
and the 144 MHz leakage getting into the preamp would probably blow the device
the first time I keyed.
I am not using any TR switching on the preamp. (I only work the FM birds at
this time).
After building the kit, I put it up, worked a pass on AO-27, then goofed and
sent 432 TX energy up the line, blew the amp. I ordered replacement
transistors from MCM for $.52 each!
Although I cannot measure noise figure, it specs at 1dB, 15 dB gain. I know
it makes a HUGE difference on my end. Satellites that were noisy before are
now full quieting and armchair copy
I have found this item a very cost effective solution. I wanted to share this
experience with the group. I'm just pleased with the preamp and of course,
receive no personal gain by recommending this product.
Michael Heim
ARS KD0AR
------------------------------
Message: 3
Date: Sun, 31 Aug 2008 10:08:29 -0800
From: John W Lee <k6yk(AT)juno.com>
Subject: [amsat-bb] Re: apparent beacon on 435.300
To: amsat-bb(AT)AMSAT.org
Message-ID: <20080831.100918.2132.8.k6yk(AT)juno.com>
Content-Type: text/plain; charset=us-ascii
I copied pretty much all the telemetry from that RS-30 one day,
it had a pretty good signal all right! Just up a few KC from
AO-51 downlink. Maybe 435.312 and doppler down to 435.309.
73
John K6YK
--------- Forwarded message ----------
From: "Andrew Glasbrenner" <glasbrenner(AT)mindspring.com>
To: "Michael Heim" <kd0ar(AT)sbcglobal.net>, <AMSAT-BB(AT)amsat.org>
Date: Sat, 30 Aug 2008 21:47:18 -0400
Subject: [amsat-bb] Re: apparent beacon on 435.300
Message-ID: <9613C898F07A4BF48BB9E7E1ED3FAC96(AT)andrewlaptop>
References: <835738.14534.qm(AT)web81504.mail.mud.yahoo.com>
It's RS-30, aka Yubileiny, on 435.315 and 435.215. Apparently there are
no
two-way packages onboard, unfortunately. It's also unfortunate that the
builders didn't coordinate their downlinks with the IARU, and they ended
up
so close to the AO-51 downlink.
73, Drew KO4MA
----- Original Message -----
From: "Michael Heim" <kd0ar(AT)sbcglobal.net>
To: <AMSAT-BB(AT)amsat.org>
Sent: Saturday, August 30, 2008 8:25 PM
Subject: [amsat-bb] apparent beacon on 435.300
> I've heard a CW beacon a couple of times operating on or around
435.300.
> Unfortunately I dont have exact times from my QTH, but I cant find
> anything in the satellite list on AMSAT's site that has a working
beacon
> on this frequency (or anywhere close). I heard it about 23:45Z,
breaking
> the squelch (on FM) while waiting for the next AO-51 pass. This will
put
> it about 10-15 mins before AOS for AO-51 from my QTH in EN90rw. Pardon
me
> if there is an obvious answer to this, but I'm not familiar with all
the
> ham birds up there yet.
>
> Just trying to figure out what I could be hearing? This is not the
first
> time I've heard CW on this freq.
>
> Michael Heim
> ARS KD0AR
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. Opinions expressed are those of the
author.
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------------------------------
Message: 4
Date: Sun, 31 Aug 2008 11:11:42 -0700 (PDT)
From: Michael Heim <kd0ar(AT)sbcglobal.net>
Subject: [amsat-bb] Re: preamps
To: Doug Faunt N6TQS +1-510-655-8604 <faunt(AT)panix.com>
Cc: AMSAT-BB(AT)amsat.org
Message-ID: <846736.7321.qm(AT)web81507.mail.mud.yahoo.com>
Content-Type: text/plain; charset=us-ascii
Hey Doug,
I use it on both radios. Improves both radios very nicely. I can even hear
the birds when they go behind the trees, where I couldnt make out the audio
before. Worked all 3 FM birds on it now, and there is a day and night
difference on either radio I use. Just be careful you dont transmit on 435
mhz. I did, and the transistor will pop instantly.
I put my preamp between the 435 feed and the diplexer. Its safe with up to 20
watts TX on 145, no burnouts... I worked the last pass running that much, I
havent tried it with more. No filtering on the input, used an arrow-like HB
antenna. Pretty rugged, if its not mistreated (ie. transmitting on 435).
Also, I am working on an eggbeater for use on the SSB birds. Going to start
testing the 435 version after I send this email off. Because I'm not
switching the preamp, I have to go this route with seperate TX/RX antennas for
these birds.
Michael Heim
ARS KD0AR
----- Original Message ----
From: Doug Faunt N6TQS +1-510-655-8604 <faunt(AT)panix.com>
To: kd0ar(AT)sbcglobal.net
Sent: Sunday, August 31, 2008 1:37:14 PM
Subject: Re: [amsat-bb] preamps
Does it improve the FT817? Mine seems to work well, but for $20....
I use the 817 for RX, and an ICOM IC706MKIIG or IC7000 for TX.
73, doug
Date: Sun, 31 Aug 2008 09:59:33 -0700 (PDT)
From: Michael Heim <kd0ar(AT)sbcglobal.net>
A recent post mentioned the need for a preamp. This reminded me of
something I want to share with the group.
Station here consists of an FT-817ND and an FT-857D. The 817 is pretty
sensitive on UHF, but the 857 is a little lacking in comparison.
I was looking for a preamp online that would help, especially with the 857.
I went and ordered a Ramsey PR40. I figured for $15 I couldnt go wrong.
Although its not a GaAs device, (its a bipolar), it works pretty well. I
actually didnt want a GaAs because I was afraid of blowing the device anyway,
being I'm running a homebrew "Arrow style" antenna on a fixed elevation mast,
and the 144 MHz leakage getting into the preamp would probably blow the device
the first time I keyed.
I am not using any TR switching on the preamp. (I only work the FM birds at
this time).
After building the kit, I put it up, worked a pass on AO-27, then goofed
and sent 432 TX energy up the line, blew the amp. I ordered replacement
transistors from MCM for $.52 each!
Although I cannot measure noise figure, it specs at 1dB, 15 dB gain. I
know it makes a HUGE difference on my end. Satellites that were noisy before
are now full quieting and armchair copy
I have found this item a very cost effective solution. I wanted to share
this experience with the group. I'm just pleased with the preamp and of
course, receive no personal gain by recommending this product.
Michael Heim
ARS KD0AR
_______________________________________________
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: Sun, 31 Aug 2008 11:44:22 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb(AT)wd9ewk.net>
Subject: [amsat-bb] Re: Radio setups
To: amsat-bb(AT)amsat.org
Message-ID:
<2e18ad3e0808311144y1a2c9ca2g345798ff8ae7288e(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Hi Simon!
> I could be wrong (I hope not) but the FT-8x7 is not suitable for TX as you
> can't adjust the TX frequency while transmitting. The IC-7000 is OK in this
> respect, so maybe a IC-7000 / FT-817 combo? Otherwise I would suggest a
> IC-703 + transverter?
I am currently using a pair of FT-817NDs for my all-mode satellite
station. I do not have these radios under computer control yet, so
I try to comply with the "rule" of making frequency adjustments on
the higher frequency. I can, and regularly do, change my transmit
frequency while transmitting on these 817s. Very nice! I don't
know if that is possible with computer control, but the "big" knob
on the front will do that.
Once I get a better (smaller, longer battery life) laptop, I plan on
getting the cables and putting both of these radios under computer
control. I have followed your HRD program development, and saw
it in use with a friend's satellite station a few months ago. It would
be very nice. I also need to add other non-computer components
to this portable setup to make my life (and those hearing me on the
SSB birds) a little easier: tripod for the Yagi instead of holding it
with one hand while working the mic/CW paddle/radios with the
other hand, preamp to help with AO-7 and DO-64 passes that are
not above 30-40 degrees elevation (I can hear the downlink OK on
higher DO-64 passes), and maybe a headset/mic so I'm not
holding the mic while on the birds.
73 from the desert!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
_______________________________________________
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 441
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