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wrote: <zerobeat40@> envelope varies from zero to full pep. So, if your two tones are, say, 3Hz apart, then the power supply is having to feed out current that varies at a 3Hz rate. Not a prob with a

Hey Jim, No, the book is ARRL's VHF/UHF Handbook. The formula is correct, as it is found elsewhere, including Orr's book (p 2-6, 23rd Edition). He includes the term for inclusion of a dielectric. He

--- In ham_amplifiers@..., "pentalab" <jim.thomson@...> wrote: > > --- In ham_amplifiers@..., "zerobeat40" <zerobeat40@> > wrote: > > ###> The 2 tone test is flawed, and isn't

I wrote: In the VHF/UHF Handbook, chapter Receivers, Transmitters And Transceivers , section, 'Tuned Circuits'; the author writes: "If discs are used, the capacitance varies in a very non-linear

In the VHF/UHF Handbook, chapter Receivers, Transmitters And Transceivers , section, 'Tuned Circuits'; the author writes: "If discs are used, the capacitance varies in a very non-linear manner with

--- In ham_amplifiers@..., "zerobeat40" <zerobeat40@...> wrote: ###> The 2 tone test is flawed, and isn't used anymore in the > > commercial world. By juggling the spacing of the 2 x

wrote: mis- seem to it grid the #### well, I just tried it on one of my 3 x L4B's.... I get ZERO grid current with no drive applied.... whether both 3-500Z's installed... or jus

Both. but not with a uA meter.

Did you measure it or are you still depending on the data sheet? Did you measure that, or are you still consulting the road map which may or may not agree with the roads?

Probably pico-A with 5v of reverse bias.

Not with several volts negative on the grid with respect to the cathode.

That's too bad.. it's elitist... I can remove any email (spammer) by just administering the list. His excuse of stopping spammers is bogus... There was a ALPHA list somewhere else too...maybe it went

Message 863 is not there as you stated... I have no clue where it went.. And there is NO censoreing on this list. Just play nice. pentalab wrote: -- Bob Vmoa chat list ->

Microamps is still not zero...Rich is claiming zero. I think I measured fractional milliamps - e.g. hundreds of microamps. May have to re-run the exp. The 3-500Z is not a tube I have a lot of

I would expect, at that plate voltage and 3-5 volts bias you'd have significant ZSAC... but I'd think that grid current, if any, with no drive would be measured in microamps. True? 73, Tony W4ZT

My word, did I write that? At my age, I am often guilty of mis-types of all sorts. 20 mA is far more than I would expect, and I seem to recall that I did the experiment shortly after writing about it

No He's ZED from Men in Black BOB DD ### sounds to me like "Z".... just got vindicated.... and I doubt "Z" would semi-float the grids on a 3-500Z linear either. Heck... for all we know... the "Z" in

True enough, Denny Z. I did the same experiment when I was in college. Zeb's problem is that he is the person who said: #643 Re: SB-220 Questions "With 3.5kV applied, a good tube in one socket, and