[amsat-bb] Ao 73 problems

[Bob]

Hi George,

You are one of many who have said manual tuning is best, and after so many
similar comments, I should probably give that a whirl.

Of course this will vary for rig and doppler, but I'd be curious to know
what you find your tx frequency to be at mid pass?

The reason for asking is the published spec is

Uplink 435.150 - 435.130 MHz LSB (Inverting)
Downlink 145.950 - 145.970 MHz USB

Implying that a RX of 145.960 (mid band) would have a TX of 435.140.  From
my tests it appears that I would actually have to transmit on 435.156 to
hear myself at mid-pass.  That, of course, appears to be outside of the
published passband, and those published specs probably prevent anyone new
to the bird from ever finding themselves.

I appreciate and data or feedback.

73, Bob, WB4SON




On Mon, Oct 26, 2015 at 12:21 AM, George Henry <ka3hsw at att.net> wrote:

> I have found that computer tuning for AO-73 simply doesn't work...  the
> satellite frequency drifts enough that your up- and downlinks won't stay in
> sync for long.  I leave my downlink frequency alone as much as possible
> (unless needed to chase the other guy), and manually adjust the uplink, and
> that has worked well for me.
>
> George, KA3HSW
>
>
> ----- Original Message ----- From: "mm0kjg via AMSAT-BB" <
> amsat-bb at amsat.org>
> To: <amsat-bb at amsat.org>
> Sent: Sunday, October 25, 2015 6:24 AM
> Subject: [amsat-bb] Ao 73 problems
>
>
> Hello all.
>> I seem to have a wee problem with working Ao-73. The problem I cant work
>> it at all. I am hearing people talking but when I attempt to find my
>> downlink nothing heard. I have tried sending cw up and tuning downlink and
>> also tuning uplink and nothing.  I have set up tuning for 145.950 down and
>> 435.150 up. Am missing something here?
>> I spoke to my good friend and very good Sat operator Derrick Gm0fmw and
>> he also cant access it with a fairly good antenna set-up. We are both in
>> Edinburgh Scotland Is this the problem?
>> Please all help will be appreciated .
>>
>> Thanks Kev MM0KJG
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