[amsat-bb] AO-7 Mode A

[Greg D]

Any recollection on where we were in the sunspot cycle then vs now? 
That could affect both the noise floor as well as the signal itself on HF.

Greg  KO6TH


John Geiger wrote:
> 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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>> to all interested persons worldwide without requiring membership. Opinions
>> expressed
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>> AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions expressed
> are solely those of the author, and do not reflect the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb