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wrote: the emission and then current flows? ### anode/grid current/drive power has nothing to do with emmision. Take 2 x identical linear's..... one with just the fil /blower on.[no HV no drive

That's an excellent idea Bill. I will have to try that the next time I test GS-35B's. Don't know if I will be able to see much with the ceramic but I would bet it would be easy to see with glass

ORIGINAL MESSAGE: ------------ REPLY FOLLOWS ------------ Perhaps so, but if they can accelerate to a certain speed in the half inch or so between cathode and anode, why could they not decelerate an

ORIGINAL MESSAGE: <w4zt-060920@...> wrote: ------------ REPLY FOLLOWS ------------ One way to prove it once and for all would be to try to deflect the beam with a magnet. Electrons would be

I use HN connectors for high voltage and use RG213 as a conductor. the chassis side I found a mate with a long leakage path. wa1gfz pentalab <jim.thomson@...> wrote: --- In

They can't reverse direction quick enough? R L MEASURES, AG6K. 805-386-3734 r@...

the rays glass. I've seen this in sweep tubes also many times. The glass had a blue glow in places where there were holes open in the anode. I think

Gettering of those and similar tubes is done by the anode coating. One reason they have to be driven red, which is about 800°C 73 Peter ________________________________ Subject: [ham_amplifiers] Re:

Jim, Did you ever get to speak to anyone at Eimac about where the getters were at in a 3-500Z? That's a question I'd say a few of us would like to find out about as I think there is some erroneous

Hi Jim, I understand that tube life is dependend on their vacuum and on the emission from the cathode such that material of it disappears until worn, and then the tube is probably send in for a new

Bill Turner wrote: <snip> They're moving too fast to circle back in that distance. We had a discussion about fluorescence in ceramic tubes some time back and I posted a few pictures of GS-35B's

ORIGINAL MESSAGE: ------------ REPLY FOLLOWS ------------ Wouldn't electrons which "miss" the anode be immediately attracted back to the outside of the anode? Why would they continue out to the glass

I have seen this on 807s running at 750v with this glow on Tx. Soft X-rays are more like >10,000v. As I see it, the effect is caused by electrons from the cathode missing the anode, striking the

If this is the case, why not use the tubes as they are being gettered? This has always been the way that I have done it. Yes

ORIGINAL MESSAGE: wrote: ------------ REPLY FOLLOWS ------------ A good source of HV wire is West Marine. They have a 40 kv marine grade wire. They sell it by the foot so you buy only what you need.

ORIGINAL MESSAGE: wrote: ------------ REPLY FOLLOWS ------------ I don't think this is a defect. Many tubes show a fluorescence on the inside of the glass when operating. I was told it was "soft"

Am 24.09.2006 um 10:47 schrieb pentalab: ;-) It did help. All of them say "I'm the best". That's why I kept asking here. Tnx for sharing your experience! 73, Frank DG1SBG

drive is applied? ... or when both are applied? ### getter's [per Eimac and Svetlana] are ALWAYS working... as long as the fil is lit. HV + drive are not part of the overall process. none of them

Yep, it does, I just tried it. On the crimp version one has to remove the outside plastic insulation in order to crimp it. Cheers, Dick PA3DUV

### If that's the case... then it will also accept Teflon RG- 393 coax.... which is a bit smaller OD than 8-U/213-U [.390" OD for 393 coax.... vs .405" OD for 8-U /213-U Jim VE7RF a bit flimsy. Greg!)