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Re: Full duplex handhelds ?



I use SatPC32 with my 910H, with an interface built on a PC board from FAR 
Circuits, based on a 1996 or '97 QST article.  Very easy to set up, free 
demo version available (converts to registered version with code purchased 
from AMSAT, all $$ from registering goes to AMSAT...), author is a regular 
on this BB, and it does antenna control also.  Used Instant Track (without 
doppler) before that.  I am not at all familiar with UNI-TRAC...

George, KA3HSW

----- Original Message ----- 
From: "Edward J. Polack" <epolack@earthlink.net>
To: "George Henry" <ka3hsw@earthlink.net>
Sent: Thursday, March 17, 2005 7:53 PM
Subject: Re: [amsat-bb] Full duplex handhelds ?


> George , What are you using for your computer doppler tuning software? I 
> am
> considering getting the UNI-TRAC 2003 to use with NOVA, what do you think?
> Thanks Ed P N8EQJ
> ----- Original Message ----- 
> From: "George Henry" <ka3hsw@earthlink.net>
> To: "amsat bb" <amsat-bb@amsat.org>
> Sent: Tuesday, March 15, 2005 8:36 PM
> Subject: Re: [amsat-bb] Full duplex handhelds ?
>
>
>> I use an Alinco DJ-G5T...  works great.  Have also used a Yaesu FT-470,
>> which also worked well (worked MIR with it...).  The main drawback to any
>> full-duplex HT that I am familiar with is that you cannot change the
>> downlink frequency while you are transmitting.  You have to switch bands,
>> change frequency, and switch back.  For low elevation passes with slower
>> doppler rates, that's not a big deal, but at higher elevations when
> doppler
>> is changing very fast, the sat can fall out of the passband very quickly.
> I
>> don't know if any of the newer HT's allow you to "pair" both bands in a
>> single memory, but if so, that would be an ideal way to handle it:  just
>> program a bunch of memories with corresponding up- and downlink
> frequencies,
>> and dial thru them as the pass progresses.  With mine, you have to have
>> separate VHF and UHF memories programmed, and change both.  It can get a
>> little hairy pointing the antenna, changing bands and frequencies, and
>> logging, but it can be done.  (At home and for Field Day and other
> portable
>> ops, I usually use my IC-910H with computer doppler tuning...
> SOOOOOOOOOOO
>> nice!)
>>
>> And headphones are a MUST...
>>
>> George, KA3HSW
>>
>> ----- Original Message ----- 
>> From: "Tim Tuck" <tim.tuck@penrith.net>
>> To: "AMSAT BB" <amsat-bb@amsat.org>
>> Sent: Tuesday, March 15, 2005 4:47 PM
>> Subject: [amsat-bb] Full duplex handhelds ?
>>
>>
>> > Hi all,
>> >
>> > I'm in the market for a VHF/UHF handheld to use on AO51 etc and I was
>> > wondering
>> >  what gear you guys n gals are using ?
>> >
>> > I'd be interested to here pros and cons for various handhelds
> specifically
>> > for
>> > working the easy sats.
>> >
>> > thanks
>> >
>> > Tim
>> >
>> >
>> > -- 
>> ----
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----
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