OK, you found an HF amplifier.
Next step -- RESEARCH and READING.
Tom, W8JI Yaesu FL-2100 Modifications and Repairs
Another common failure, High Input SWR.
As far as 572B tubes, RF Parts sells both types (Chinese and Russian mfg.).
I would select based on the criteria: warranty and price !
Yaesu HF Amplifier - FoxTango web page
Read her commentary about used FT-2100 purchases, and the common areas requiring
VISUAL inspection and/or testing (e.g. burnt, damaged components).
Carol Maher at FoxTango has the manuals that you can download !
FoxTango uses Taylor tubes in their restorations and rebuilds,
since the original Centrons used by Yaesu are no longer manufactured.
Repair parts can be purchased from RF Parts, Mouser, DigiKey and
other US electronics distributors/retailers (NOT Radio Shack).
Yaesu technical service bulletin (1996)
Last edited by W9GB; 02-26-2011 at 01:40 PM.
We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths. -- Walt Disney