[Heathkit] HW-16 audio troubles

[Edward B Richards]

Hi Tom et al;

Something we used to do at Motorola, when I worked there, for ground
loops: as long as the radio is being grounded some other way, put a
ground breaker in the AC line. This is just one of those adapters that
come with some appliances that takes a 3-prong plug and outputs a 2 prong
plug and a separate ground wire. Intended to be used with older 2-slot
outlets. Leave the ground wire disconnected. I had to put one on my
satellite receiver to take the hum out of my stereo. The satellite
receiver was grounded by both the AC cord and the coax. Good luck.

73, Ed Richards K6UUZ
 

On Tue, 1 Mar 2005 08:13:37 -0600 =?iso-8859-1?Q?Tom_N=D8JMY_-_AAR7FV?=
<tfarl at mchsi.com> writes:
> I've got another HW-16 on the bench here that exhibits that hum, or 
> hollow feedback noise, when the AF gain is not fully clockwise.  
> There 
> was a thread on one of the lists about this awhile back, but I can't 
> 
> find it.  I remember one of the suspects was a ground loop 
> somewhere, 
> like a coaxial cable with the shield grounded at both ends.
> 
> Does anybody have any good suggestions on a trouble shooting 
> procedure 
> for this?
> 
> 73,
> Tom 
> 
> 
> _______________________________________________
> List Administrator: Duane Fischer, W8DBF        
> ** For Assistance: dfischer at usol.com **         
> $$ See the vintage area on the HCI web site - http://www.w9wze.org 
> $$ 
> Heathkit mailing list
> Heathkit at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/heathkit
>