[Amps] SB220 QSK bias and RF relay mounting

John Lyles jtml at losalamos.com
Sun Sep 18 16:37:09 EDT 2016


Its been a long time since I replaced the open frame power relay in mine 
and installed a vac relay for output and small RF relay for input 
switching. I removed the OEM relay and mounted it in that general area 
using the same RG8 pigtails that supplied RF to the OEM relay. I believe 
I made a small vector board to hold mine, but its been over 20 years and 
I didn't take photos unfortunately. I would not suggest moving the QSK 
board anywhere near the output circuit above the deck. Hot glue or RTV 
doesn't sound like a long term solution, as if it every comes loose, 
expect fireworks when it falls onto the bottom cover. If you can, use 
the screw holes for the OEM relay to mount the assembly.
73
John
K5PRO


>> I?ve got a SB220 thats been on the bench since last year. It?s
> nearing completion but I have a few remaining items left. One of the
> last is finding a place for the W7RY QSK board and a pair of vacuum
> relays I found on eBay. I?m looking for some guidance on the best
> location for mounting the relays. They came in a nice bracket but
> IcanTMt seem to find a good orientation. There are some phots online
> but not many that show dual relays. Any guidance/photos from the
> group would be very much appreciated. Related, I assume using some
> kind of glue (silicon ahesive) instead of drilling holes would be
> ok?
>> >
>> > -Warren



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