[PVRCNC] FS 6 position antenna switch
alsopb
alsopb at gloryroad.net
Fri Apr 29 07:39:25 EDT 2005
Guys,
I have one of those 6 position antenna switches FS. It was an April
QST feature. I built two and need only one. Sell for price of parts.
$40.
Description:
1) 12 VDC relays
2) 160 - 6M
3) about 1000 w PEP but really unknown. Relays have a 20 amp contact
rating
4) unused positions ungrounded
5) multiple positions can be switched (stack???)
6) operates of 10-20 volt DC power plug. About 30 ma for each
switched relay.
The reason that the second is for sale is that it was too lossy at 2M
and above. The QST article sort of implies it could be used there.
The tech who wanted it couldn't tolerate the VHF loss.
Here are some measurements done on it:
SWR all six ports < 1.2 :1 at 28.5 MHz.
Best ports 1:1 at 28.5 MHz
6M loss 0.2 db
2M loss 5 db
Assembled PCB and 6 position switch only. No enclosure. Author put
his in a plastic kids lunch pail for remote use. Requires one wire
per port plus ground plus a 6 position switch. One might get away
with using coax ground.
73 de Brian/K3KO
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