Bought this used from an estate sale in 2014. Worked great for 3 yrs. Then a tube short blew a fuse. Replaced both finals and all was well until a few months ago. The amp worked well for a few transm
Sounds like one of tubes shorted. If they are still under warranty, I'd contact RF Parts and see what they say. They replaced a tube I had that shorted. 73 Stan KM4HQE _______________________________
Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>
Date: Fri, 9 Mar 2018 13:58:59 -0500
You can remove one tube, greatly reduce drive, and see if there is any output. Make sure the anode cap from the removed tube is clear of everything near it and not shorted. Replace all safety screeni
Don't do that for a long time. The output matching network is designed for the plate impedance of two tubes in parallel, which is one half the impedance of only one tube. The variable capacitors in t
I had one bad tube in my Centurion that caused that condition. Andy...W3LI ________________________________ Don't do that for a long time. The output matching network is designed for the plate impeda
Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>
Date: Fri, 9 Mar 2018 16:11:17 -0500
Also, if there was a short, the plate choke could be open and you will not see high voltage on the plate voltage metering. Or perhaps a glitch resister opened. Did you look at the plate idling curren
Author: Frank Kirschner <frank.kirschner@gmail.com>
Date: Fri, 9 Mar 2018 21:29:54 -0500
Same here. I bought a matched pair, replaced both tubes, and it has worked FB since then. 73, Frank KF6E _______________________________________________ TenTec mailing list TenTec@contesting.com http