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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

wrote: RICH SEZ... Do you have a FCC callsign? group? Thompson, per my birth cert. No ham ticket, no callsign. Not a famous author, nobody knows me anyway. Why does it matter. I've gone by "Z" or

wrote: wrote: you can hit a .."sweet spot" and come up with really good IMD numbers. spacing, you challenge the power supply bypassing, so the worst numbers often occur at that test condition. ### say

Z is slick... The bench test with just the filament heated fills the tube with an electron cloud... The electrons have velocity... Some will impact the grid and be captured... The grid will become

My guess is that his glass had been emptied before he made this measurement. cheers, Jim R L Measures, AG6K, 805.386.3734 r@..., , rlm@..., www.somis.org

As I recall, the problem is that "Z" previously stated that, according to the characteristic curves, a 3-500Z(?) flows __mA of grid current when the grid-cathode potential is negative __V. According

It does not appear in your signature. for Zebediah? Because you are a human just like most of the rest of us.

Gidday Z, Keep postin mate,callsigns dont matter, I don't post, just like to read an learn...just finnished me first amp an picking up tips for me next one...so keep em coming. Cookie zl4ad

Yeah thats far far too much, he must have had some dirt on his glasses when he did that measurement. I have a T-4XC on the shelf, one of these days I will measure it. 73 Jim SM2EKM -------------------

Those tests where at full power, with quite a bit ALC pulled, also quite a bit of processing. One can say that both radios was "forced" a bit, did also use an audio RF clipper with the KWM2. This is a

This is a very good point by Greg, I agree 100% 73 Jim SM2EKM --------------------- badgerscreek wrote:

Mark wrote: And apparently you must have a call sign to join too.

zerobeat40 wrote: Welcome to the group Z.

I just ran across this on yahoo groups http://groups.yahoo.com/group/Alpha_Amps 73 Mark W0NCL ____________________________________________________________________________________ Get your email and

Sounds like someone needs to review his basic tube theory. Specifically, look up "contact potential bias". Now, for the experiment. Lay tube on bench. Any tube, as long as it works. Apply specified

I don't hide my name. My given name is Z Sampson Thompson, per my birth cert. No ham ticket, no callsign. Not a famous author, nobody knows me anyway. Why does it matter. I've gone by "Z" or "Zed" all