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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