>2 Wrote:
>
>
>>>or
>>>arcing due to a mismatched load, or a Rocky Point arc?
>>
>>** RCA's Rocky Point Investigation was somewhat specious since there is
>>no such thing as disappearing gas and vanishing "barnacles".
>
>Well, so much for RCA then! And so much for the G-E Research Labs,
G. W. Flyer of GE (1935), H. F Dittrich of Phillips (1958), and ARRL's F.
E. Handy (1926) arrived at a different conclusion than RCA's Rocky Point
investigation. [Dittrich, H. F.; *Tubes for R. F. Heating*; N.V.
Phillips Gloeilaampenfabrieeken--Eindhoven, the Netherlands. Section
5.8, ''Parasitic Suppression Circuits'' begins on page 96.]
>and all the R&D work that went into their book on 'Vacuum Arcs'; and
>Gossling's work with the UK General Electric Company (no relation) and
>the BBC; and all the other workers who have found ample evidence for
>arcs... including Eimac.
>
Eimac reference, please.
>Selectively ignoring evidence will not make it go away.
>
The problem with Rocky Point Effect is that there is apparently rarely
evidence to support it during kaput tube/valve autopsies. I have yet to
autopsy a tube with an anode arc-mark and that includes tubes that are
gassy due to a leaky seal. Another problem is that it seems unlikely
that (since sound travels in air) an amplifier could produce a stentorian
bang from an arc inside the vacuum. I have not yet found an amplifier
that produced a loud bang that did not have a damaged VHF parasitic
suppressor resistor. This tells me that there is a quite likely a VHF
connection with loud bangs.
- My first trip with a dipmeter through my less-than-stable SB-220 was
quite enlightening. That is, not all of the resonant circuits are shown
on the diagram. Murphy was right -- things are usually more complicated
than they look.
- Have you ever seen autopsy evidence to support Rocky Point Effect?
cheerz, Ian
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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