[Amps] Ameritron Amps

[Steve Thompson]

R L Measures wrote:
> On Jul 30, 2006, at 8:18 AM, Tom W8JI wrote:

>>When the Chinese were making 3-500Z tubes with regular glass
>>and holes were sucking in the sides, Rich concluded it was a
>>VHF parasitic that couldn't be seen or measured. This VHF
>>oscillation supposedly caused dielectric heating of glass at
>>VHF.
> 
> 
> Correct.  Rus Healy at QST was the first who told me of this  
> phenomenon.  However, it took Eimac a while to come up with a glass  
> recipe that would not melt at VHF, so I was not surprised that the  
> Chinese initially encountered the same difficulty.
Do you know when this was? I'd like to know which date codes to avoid.

Thanks,

Steve