[RFI] BCB interference on 160

Cortland Richmond ka5s at earthlink.net
Wed Sep 14 02:19:29 PDT 2011


I suspect you will have to put your trap across the diodes, as they seem 
a likely candidate for the mixer here. If you have to go that far, you 
might as well change to back to backdiodes. Maybe four of them in combo 
might allow the tuning voltage to be kept the same.

A series tuned circuit across the loop could affect its tuning too. IMO.


On 9/13/2011 10:42 PM, rick darwicki wrote:
> Hi all,
> I recently built a sheilded RX loop for 160 per N6RKs Contest Jouranal artical. It is diode tuned and covers about 1.5-4 mhz. I am hearing two AM radio stations on 1830 khz.
> They are 640 and 1190 combined. 640 is a 50KW station about 12 miles east and 1190 runs about 1.5 kw at night.
> The anetnna is all sealed up and on the roof. I would like to cure the problem without changing to back to back tuning diodes.
> I'm thinking a series trap tuned to 1190 or 640 or both. Maybe a high pass filter.
> Any suggestions? I can built it, I don't want to spent $200 for the W3s highpass hi hi
> Thanks,
> Rick, N6PE
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