>
>Hi Terry,
>
>Most people have names. If you are addressing me, use my name
>and I will answer.
>
>I wouldn't call you Mr. Sucker, and in return I don't expect to be
>called Mr. Denial.
>
? You appear to have impared reality on this matter, Mr. Rauch. This is
seemingly why you will not discuss - or even acknowledge - Your post to
rec.radio.amateur.homebrew NG on 28 November, 1996.
>> I really question why I am wasting my time with this ... I hope this will
>> be of interst to some ... I am sure Mr. Denial will will just consider it
>> nonsence as he has with most all of Rich's claims ... But this is from the
>> real world of what actually happens ....
>>
>> The amplifier was in STANDBY ..... NOT KEYED .... but with all voltages ON
>> ! I had a reason to remove the top cover (high voltage interlock removed),
>> I slowly raised the cover from the front of the amplifier leaving the rear
>> of the cover sitting on the amplifier ... when I got the front of the
>> cover raised about 3 inches ... all of a sudden the amp made this huge big
>> grunt and the circuit breaker tripped off. After I removed the top cover
>> and turned the amp back on I had idling plate current in the standby mode.
>> Long story short ... I had one of the two 3-500Z's with a grid to filament
>> short and that tube had metal particles rolling around inside of it. Ten
>> minutes earlier this amp was putting out 1300 watts on 20 meters. NOT
>> knowing what had happened I replaced the bad tube and tried again. Guess
>> what ... with the cover about 3 inches raised ... yes ... I lost another
>> 3-500Z ! This was a damn expensive way of being introduced to the type of
>> oscillation that Mr. Denial says can't happen !
>
>The theory you are supporting is Rich's claim that a photon can
>strike the cathode of a tube that is on standby, and cause enough
>current flow to arc over the relay contacts and put the amplifier in
>an operating mode.
I have no idea of what gets struck and liberates current carriers. .
>
>Once in the operating mode from the wayward photon, the amplifier
>that was OK for weeks or moths before (with the very same relay
>closed and opened hundreds of times) now suddenly has a
>parasitic and draws so much current it actually explodes the
>elements inside the tube.
I have never seen an element explode. . I have seen 3-500Z/8008
filament helices that bend and touch the grid cage. . . In amps with
gorilla supplies- such as the Henry 3K-A - one event is apparently
enough.
>
>I'd like to ask a few questions:
>
>1.) What type of amplifier was it.
>
>2.) What type of tubes.
He told you.
>
>3.) Why don't the photons generated in normal operation cause the
>same problem?
Gamma rays from normal operation? Whew. Now that's really a ''big
one''.
>
>4.) Why don't photons in gas-filled tubes specifically designed to
>detect photons have even modest amounts of current?
>
>5.) Why do hundreds of other amplifiers without covers not fail?
>
Because Murphy was right.
>6.) Since the saturated current of a 3-500Z is about 10 amperes or
>so (that's all the filament can "give up", even if you hold the anode
>and grid at 3000 volts positive), how does the oscillation cause
>enough current to shatter the filament or grid?
>
>7.) If the tube could supply that much current, how does it get that
>current so fast through the high surge impedance of the path from
>the energy storage area (power supply) into the tube?
>
The ESR between the filter C and the anode is typically less than a dozen
ohms plus the glitch R. What is ''high surge impedance''?
cheers, Tom
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