[TenTec] Argonaut 505

[Dave]

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 at 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
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec