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Sean 12Footer | all galleries >> ham > Coax Switch
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Coax Switch
July 26, 2008

Coax Switch

I think i have everything i need to start building another remote coax switch.I bought the SMA 6-position switch on Ebay for 20 bucks.
I already accumulated the rest of this stuff;
Project box, DPDT switch ( a SPST is all that is needed tho),9-pin DIN plug (maybee),a 28VDC store-bought power brick (Jemeco #1707091)with all but the bottom of the case removed, 2P6T rotary switch.
I'm considering adding led indicators. But my main concern is RF arc-over (internal lightning caused by RF arching accross the close air gaps in the SMA switch block. I should be fine at HF freqs as long as I keep RF power below 300Watts PEP.
Anything over that, and I'll end up with a light show.

Sony DSC-S40
1/40s f/2.8 at 5.1mm iso200 full exif

other sizes: small medium large original
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