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@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
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