[TenTec] Century 21 audio hum

[Carl Moreschi]

I don't think 8 ohm headphones were correct.  I think much higher 
impedance phones forces you to turn the volume up and drown out the hum.

Direct conversion receivers are susceptible to a hum because the VFO is 
running at the operating frequency and can mix externally with 60 hertz. 
  This is then detected in the receiver as a hum.  I used to put .01 
caps across my HW8 power supply to kill this RF and remove a lot of the 
hum.  Electrolytic caps don't work at RF.

Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com

On 5/30/2017 4:42 PM, Stuart Rohre wrote:
> But if one diode in a bridge rectifier opens up, you have a off balance
> power supply DC bus.
>
> Stuart Rohre
> K5KVH
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