I have a brand new, never used, Peter Dahl filament transformer. It has a 120/240 vac primary with a 6.3 @ 55 amp secondary. Asking $175 or best offer. Willy K3VW ____________________________________
I have four (4) good but used 4CX250F/G tubes. They have the 26.5 vac filament. Will take $150 shipped CONUS only. Willy K3VW _______________________________________________ Amps mailing list Amps@co
I don't know about the 3CX5000A7 but I have a good, used pull from an MRI machine in a 3CPX5000A7 with filament transformer, for $450 shipped, CONUS or would consider a trade on a KW amp. Willy K3VW
I have a brand new, never used, Peter Dahl filament transformer which is 6.3 vac @ 55 amps. You can power a pair of 3CX1200D or Z7's. $160 shipped CONUS ONLY Willy K3VW ______________________________
Scott, N9AA, sounds like a bad tube with a filament-to-grid short to me !! Willy K3VW _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com
I did the mod about 10 years ago. Peter Dahl has the special transformer, that fits in but is a tight fit. I bought the oil filled cap from him too. There are two, that are real small but cost quite-
The problem with 3-500Z's was/ is caused by insufficient cooling of the tubes. Some amps even use a muffin fan on 3CX800 tube amps, which, according to Eimac's spec's are to be cooled by a blower, no
I have several tested good 4-1000A tubes. Two are a matched set of Penta Lab tubes. Also have a H.B. 4-1000 amp that works 10 to 80 meter's. Has 3.3 KVDC w/ oil cap. RF deck has meters and vacuum var
Ask Bill Edwards of Omega Electronics in Knightdale, NC at 919-266-7373 He specializes in Ameritrons. Willy K3VW ** See what's free at http://www.aol.com. ____________________________________________
A 4-1000A is a tetrode and using it in grounded grid, raises the IMD products and is harder to drive. It is easier, to build one in G.G. but grid driven is the best way to go or even G2DAF ! Willy K3
The 3CX1500C7 is not the same tube as the 3CX1500A7. Check the Eimac spec's on the ( C7 ) Willy **Start the year off right. Easy ways to stay in shape. http://body.aol.com/fitness/winter-exercise?NCI
I have a very clean and good working, Henry 1KD-5 linear amplifier, with a good Eimac 3-500Z tube. Have original manual. Will take $750 for it, picked up here near Raleigh, NC. Willy K3VW **Gas price
Bob, have tried putting some 1K pf/ 1000vdc caps to by-pass for RF at the 120 vac ? Willy K3VW ** New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News & mor
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I have a 3CX1200Z7 tube, that has a 6.3 vac fil. Has three pins for fil & cathode and a grid ring around the middle to ground the grid. Any tube has to go thru a gettering process before putting B+ o