开云体育

I threw a few misc pix on the ..'photo's . Later.... Jim VE7RF

bloody capacitors are common in larger commercial amplifiers. ### Jenning's only list's one water cooled cap...1000A ! ### Jenning's makes one air cooled cap... abt 17" long...8" diam. 400A.... [no

Don't know if you were referring to me or not. 73 - Doug N9XTF internet?,

Well, do you remember my last post about that VHF solid state amp?. I emailed Henry radio asking for data about the transistors and if possible a circuit schematic. I think it was 5' later I received

Hey all, I would like to build a water cooled GS-35B for 2 meters. Although not set in stone, the current design uses a 3" dia, 1/2wl plate line. Am I dreaming of routing the water lines out the HV

zirconium coated anodes... and gettering is done when tubes show colour... aprx 800 deg C. I'm inclined to agree. only? ###### It can't !! 3-500'z don't have any internal filament heat activated

R L Measures wrote: <snip> Oh, I don't want any flowers, Rich. I'm talking about one of the BIG tywraps, the LONG ones, not the 6 or 10 inch variety. Not the black ones either ;) Your point is well

Current flowing has nothing to do with the rate at which electrons are being boiled off of the tungsten dicarbide (W^2C) layer on the filament.

What kind of flowers do you want, Tony?

To me that is hard to believe. I never recognized any emission current higher then a few microamps without voltages on other electrodes of a tube. Without anode voltage there will be only a cloud of

So how can a 3-500 be gettered by running the filament only?

Amen, Jim, and when thoriated-tungsten

My take on gettering / gas contamination, or the lack thereof, is that it mainly came from a station who was trying to explain big-bang arcing in the output sections of HF/MF amplifiers by a means

The evidence is that they strike glass, causing it ti fluoresce. I've seen 4-1000As with glass that turned pale brown where electrons had been banging it. R L MEASURES, AG6K. 805-386-3734 r@...

quite, provided the magnet is on a long enough, insulated stick. R L MEASURES, AG

wrote: working... as long as the fil is lit. HV + drive are not part of the overall gettering process. 4CX-10,000J... don't come whining to me ! use 48 hrs to getter a new/rebuilt tube.... and

Jim, Below is a quote from Terman on this subject. "Zirconium is also a useful metal in this regard. Zirconium at 1400 deg C will absorb copius quantities of such gasses as oxygen, nitrogen, carbon

getters like it have applied ### No I have not. 1 e-mail to eimac ought end the discussion . Rauch claims amperex etc... all use zirconium coated anodes... and gettwring is done when tubes shoe