[Elecraft] Elecraft Digest, Vol 201, Issue 14

[Victor Rosenthal]

I brought all the connections to the relays the KRC2 operates and its 
power supply in via a piece of multiconductor cable, wrapped 10 turns of 
it around a #31 toroid and I have since had no problems with 1200 watts 
to an antenna about 4m above my roof. No special treatment was need for 
the connection to the K3.


I may have scraped paint off the enclosure near the screws that hold the 
case together when I assembled it. I do that a lot.  A Dremel grinder 
does a neat job quickly.

73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/

On 12/01/2021 5:04, Jim Brown wrote:
> On 1/11/2021 6:29 PM, HP wrote:
>> Tom - I will give you some unsolicited advice-- The KRC2 was the 
>> worst RFI sucking piece of gear I ever owned.
>
> Simple reason -- it's chock full of Pin One Problems and is 
> unshielded. Oh, you say, it's a metal chassis. Yes, BUT -- all the 
> connectors are insulated from the chassis by paint, there's no 
> connection between pieces of the chassis because junctions are 
> painted, and so on. Shielding only works if it's continuous, and if 
> cable shields are bonded to the shielding enclosure at point of entry.
>
> One of the members of our CQP team bought two for W6GJB's contesting 
> trailer to go along with the W3NQN filters and switch box he also 
> bought. I spent a several hours scraping paint, making sure all the 
> cable shields hit the chassis at point of entry, and so on.
>
> One good thing I learned about it -- a single coax between the Aux 
> Buss and chassis of the K3 and the KRC2 is all it takes for band 
> decoding. No RFI issues with K3/KPA500/KAT500 to antennas within 50 ft 
> of the operating position.
>
> 73, Jim K9YC
>
>
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