Tom, Check out Telewave's products. I recently put up a Hamtronics repeater on 220, and I installed a Telewave T-2230 single isolator on the transmitter primarily to protect the 18 watt PA transistor. The very basic Hamtronics PA has no protection whatsoever from high SWR or load mismatches, and it also has no power control circuitry; its power output varies directly with the supply voltage, and it is easy to toast the PA transistor. Visit Telewave here:
<www.telewave.com/pdf/TWDS-4011.pdf> Although an isolator is good insurance against IM, it also serves to protect fragile PA transistors from an early demise. 73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Sent: Monday, March 12, 2007 5:09 PM To: [email protected] Subject: [Repeater-Builder] 220 MHz repeater isolator Anyone know a source for one please? 73s NB2A Tom
