Every linear Astron I've ever owned had an issue with vhf getting into the regulator thru the 12vdc output leads.
I've always cured the issue by putting a 0.01 cap across the output studs & another to the chassis from the pos stud. Additionally, you could put one from the neg stud to the chassis as well. You may need to experiment with the value. Always worked for me. I dont recall mine ever blowing the fuse though. Blowing the fuse could mean the regulator was off in lala land where it couldn't sense an overcurrent condition or control the output voltage thus causing the scr to trigger. rtc --- In Repeater-Builder@yahoogroups.com, "n9wys" <[EMAIL PROTECTED]> wrote: > > For the learned group here. >snipped..... > > Now - here's the WEIRD part. when I was at the tower with another tech and replaced the fuse the time before the last failure, we tried to use his DMM to check the P/S fuse for continuity. His meter acted as if the battery was dead - but later investigation revealed that the meter was getting hit with RF from another transmitter at the site. So I'm thinking that the RF problem may or may not be directly related to MY transmitter. (There is VHF 100W MICOR transmitter directly next to my equipment rack that is on 161.325, and transmits 24/7/365.) > > > Thanks, > > Mark - N9WYS >
