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Re: [TenTec] Argonaut 505

To: tentec@contesting.com
Subject: Re: [TenTec] Argonaut 505
From: "Dave" <frstbaptistchurch@wyoming.com>
Reply-to: tentec@contesting.com
Date: Wed, 17 Dec 2003 10:28:50 -0700
List-post: <mailto:tentec@contesting.com>
move power supply away from rig some, some TT rigs subject to hum if PS too close to one end of rig -
have fun, great little rig
Dave
K8BBM



On Wed, 17 Dec 2003 09:49:10 -0700
"JAMES T HANLON" <knjhanlon@msn.com> wrote:
Y'all,

I just became a new owner of an Argonaut 505, the very first Argonaut and my first Ten Tec rig. It came with the model 210 power supply. I am noticing a 120 Hz hum on the transmitter note on CW and a corresponding hum on the SSB signal when I run the rig from the 210. When I power it from a battery there is no hum. It is most noticable on 40 meters which is where the local oscillator is tripling, and I don't see a hum on the wave-envelope with my HP1740A 100 mHz oscilloscope. So it may be FM on the local oscillator.

I would appreciate first of all a circuit diagram for the 210 power supply, and then of course any suggestions about what to do. It is a really fun little rig when I run it from the battery.

Thanks,

Jim Hanlon, W8KGI
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