Jim I would save your money as you don't even need it. It only takes a relay that can handle 12v @ 100mA to key the amp. You can test this yourself by putting the amp on the bench. You don't even need to hook up antennas.
Just take your meter and measure the open circuit voltage on the amp keying line. It should be about 5vdc (just guessing). Then, put your meter into the mA meter mode and connect both leads to the amp keying line. You can now measure the amount of current required to key the amp. And, since you aren't putting an RF into the Amp, you don't need to hook up an antenna as it won't be amplifying. You can add a dummy load if you are the least bit concerned. There seems to be some sort of myth on the internet that you have to have a relay to key the relay in the amp. Nothing could be further from the truth. :) They are great to have if you want to hear all those relays go click! LOL The only time you need the relay is when you are using something like an old Heath Kit that had 110vac on the keying line. Anything made in this century does not require another relay in line. 73.. Mike va3mw On Sun, Aug 21, 2011 at 6:44 PM, Val Ballard <kd7...@yahoo.com> wrote: > I am using the AL-82 a very similar amp and have the ARB-704 between the > Flex and the amp and it works great no problem at all. The ARB-704 is cheap > insurance. > > Val > > From: Jim Dear <j...@w5log.org> > To: flexradio@flex-radio.biz > Sent: Sunday, August 21, 2011 10:14 AM > Subject: [Flexradio] Ameritron ARB-704 > > I have a Flex 3K and an Ameritron AL-1200 amp I would like to use with it. > I > am thinking of purchasing an Ameritron ARB-704 keying buffer. Has anyone > had > any experience good or bad with the ARB-704? Does anyone have a better > recommendation? > > > > 73, Jim > > W5LOG > > (Looney Old Grouch) > > > > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flexradio.com/ Homepage: > http://www.flexradio.com/ > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flexradio.com/ Homepage: > http://www.flexradio.com/ > _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
