These tubes are NOT hard to find nor do you have to pay 40 each for them.This is a nifty linear amplifier that pushes the tube rating envelope way beyond It is a compact package, and comes with 4 tubes (6MJ6) although in mine, one of the tubes is a 6LQ6.Power is as rated, but it is better to lower the drive power not to push them too much.
This linear will probably do a better job with reduced voltage on the power transformer; the meter says that high voltage is 1200V although absolute maximum rating for the tubes is 990V although the plate pulse voltage can be much higher. It is interesting to note that at the end of the TV tube craze (when such tubes cost 5 each), 4 of these were replaced by two 572B for similar or better power, in linear amplifier service. I purchased it on line (eBay) and have found it to be stable, and simple to use. I changed the tubes for a fresh(er) set and have an average output of 500 watts on SSB. ![]() I currently have a dipole antenna, but will be installing a tower and beam this summer. Its a well known fact that a good antenna is better than a great amp. However, a good antenna AND a good amp should make the DXing a lot easier.hi hi I paid 350.00 for the Amp, and its worth that easily Glad I purchased the amp. ![]() The output is about 500 W on CW and 600 W PEP on SSB as measured by the wattmeter on an MFJ-989D tuner. It is compact, attractive, easy-to-tune, quiet, and the cabinet always is cool to the touch. The 6MJ6 tubes are expensive and hard to find, but with proper tune-up procedures, they last a long time. It does everything that I expect a medium power amplifier to do.I would buy it again. Pretty expensive to re-tube today, and cheaply made to begin with, but treat it right and itll surprise you. The only problem I had was blowing an internal fuse, that I didnot know was there (Duh).Other than that, the amp works fine putting out 500- watts with 95 watts drive into a G5RV. You can get one on Ebay in 250.-350. Stock up on tubes though. I never had a tube blow on me yet, but I make it a practice to replace all 4 of them each year just for GP. The tubes can be secured on ebay for about 10-15 used but good, or 20-25 new. I usually run QRP, but when I need some watts, I flip her on. Runs very cool and quiet. Put a new set of RCA tubes in 3 years ago and still get the same output as I did then. You can get 6lq6 tubes on ebay for 20 each new or 10 each used that test good.
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