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MSF-5K CXB UHF R2 TX Issue
Posted: Fri Jul 01, 2016 2:31 pm
by W2IBC
I have a UHF CXB R2 5K that I am having some issues with. I have no TX output at all. VCO (both TX/RX locked) on the SSCB the PA on light is off, if i push the xmit switch I get a real fast blink of the PA on, PA key lights.
Now I have taken my ft-60r ht and the PA by itself and was able to make output. so i know it is getting dc power fine.
what am I missing? what *could* be the issue?
Re: MSF-5K CXB UHF R2 TX Issue
Posted: Sat Jul 02, 2016 1:54 pm
by W2IBC
well today I took apart everything and got some cleaner and cleaned out every pin, plug, and connector I could. and I now have transmit. PA is working.
Re: MSF-5K CXB UHF R2 TX Issue
Posted: Tue Jul 05, 2016 9:14 am
by motorola_otaku
Watch out for the PA sense cable connection to the board underneath the RF tray. That's ****ed me more times than I can count.
You might also want to take the RF board out of the RF tray and inspect the passthrough connectors. If there's black crud built up around the base of the pins that can also cause a false PA fail indication.
Re: MSF-5K CXB UHF R2 TX Issue
Posted: Tue Jul 05, 2016 11:11 am
by W2IBC
motorola_otaku wrote:Watch out for the PA sense cable connection to the board underneath the RF tray. That's ****ed me more times than I can count.
You might also want to take the RF board out of the RF tray and inspect the passthrough connectors. If there's black crud built up around the base of the pins that can also cause a false PA fail indication.
yeah I ended up taking everything apart and cleaning. all seems to be working now.
now to do the fine tune, and find all the control lines so I can hook it to the RC-210