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@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@aol.com wrote:
It's about an S-unit weaker.
73 Ray W2RS
-----Original Message----- From: Joe nss@mwt.net Ts o: rsoifer1 rsoifer1@aol.com; gzook gzook@yahoo.com; amsat-bb < amsat-bb@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@yahoo.com> <mailto:gzook@yahoo.com> To: rsoifer1<rsoifer1@aol.com> <mailto:rsoifer1@aol.com>; amsat-bb<amsat-bb@amsat.org> mailto:amsat-bb@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), Iused 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@amsat.org> mailto:amsat-bb@amsat.org To:amsat-bb@amsat.org mailto:amsat-bb@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-meterantenna 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-banderusually 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-meterantenna will show up in your results later.
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Sent via AMSAT-BB@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