[amsat-bb] AO-7 Mode A

[John Geiger]

The noise floor was probably a lot less back then, no switching wall-warts
on every device.

73 John AF5CC

On Sat, Jun 10, 2017 at 11:26 PM, Joe <nss at mwt.net> wrote:

> I just played with it some when the Mode "A" was predictable a few months
> ago. And from what I remember in like 1976 it seemed a LOT stronger back
> then. Nothing special a 10 meter dipole and Drake TR-4 for the receiver
> back then.
>
> Joe WB9SBD
> Sig
> The Original Rolling Ball Clock
> Idle Tyme
> Idle-Tyme.com
> http://www.idle-tyme.com
> On 6/10/2017 6:02 PM, rsoifer1 at aol.com wrote:
>
>> It's about an S-unit weaker.
>>
>> 73 Ray W2RS
>>
>> -----Original Message-----
>> From: Joe <nss at mwt.net>
>> Ts o: rsoifer1 <rsoifer1 at aol.com>; gzook <gzook at yahoo.com>; amsat-bb <
>> amsat-bb at amsat.org>
>> Sent: Sat, Jun 10, 2017 1:09 pm
>> Subject: Re: [amsat-bb] AO-7 Mode A
>>
>> How does it compare now to back then signal strength wise?
>> Joe WB9SBD
>>
>> The Original Rolling Ball Clock
>> Idle Tyme
>> Idle-Tyme.com
>> http://www.idle-tyme.com
>> On 6/10/2017 3:04 PM, rsoifer1--- via AMSAT-BB wrote:
>>
>>     Hi Glen,
>>
>>
>>     I remember working you with that set-up.
>>
>>
>>     73 Ray W2RS
>>
>>
>>
>>     -----Original Message-----
>>     From: Glen Zook<gzook at yahoo.com> <mailto:gzook at yahoo.com>
>>     To: rsoifer1<rsoifer1 at aol.com> <mailto:rsoifer1 at aol.com>; amsat-bb<
>> amsat-bb at amsat.org> <mailto:amsat-bb at amsat.org>
>>     Sent: Sat, Jun 10, 2017 12:41 pm
>>     Subject: Re: [amsat-bb] AO-7 Mode A
>>
>>
>>
>>     In the "goode olde dayes", when AO-7 was new (and also Oscar VI), I
>> used to use a 2-element 10-meter beam mounted below a 7-element 2-meter
>> Yagi elevated about 45-degrees.  Later, added a 70 cm beam with the 2-meter
>> beam on an az-el mount with a TV rotor for the elevation.
>>
>>           Glen, K9STH
>>     Amsat 239 / LM 463
>>     Website:http://k9sth.net
>>
>>
>>
>>                                 From: rsoifer1--- via AMSAT-BB<
>> amsat-bb at amsat.org> <mailto:amsat-bb at amsat.org>
>>       To:amsat-bb at amsat.org <mailto:amsat-bb at amsat.org>        Sent:
>> Saturday, June 10, 2017 2:22 PM
>>       Subject: [amsat-bb] AO-7 Mode A
>>
>>
>>     Mode A has always been weaker than Mode B, but with a decent 10-meter
>> antenna it is quite usable.  Many operators access Mode B with a 2-meter
>> beam of some sort, then try to hear Mode A with a dipole or ground-mounted
>> vertical , then complain that they cannot hear it.
>>
>>
>>
>>
>>
>>     There is no substitute for a good 10-meter beam.  A tri-bander
>> usually works too, but check the tuning to see that the SWR isn't too high
>> at 29.5 MHz.  If it is, you may have to re-tune it or even shorten the
>> elements slightly.  If you absolutely cannot put up a beam, your second
>> choice can be a 10-meter ground plane, elevated so it is mounted in the
>> clear.  It has no forward gain of course, but it will give you a low
>> radiation angle, which will help in hearing AO-7 when it is at low
>> elevation which it is most of the time.
>>
>>
>>
>>
>>
>>
>>
>>     With Field Day coming up, a little attention now to your 10-meter
>> antenna will show up in your results later.
>>
>>
>>
>>
>>
>>
>>
>>
>>
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>>
>>
>>
> _______________________________________________
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