Re: [Amps] Henry 2K-4 Failure

["Jim Thomson" <jim.thom@telus.net>]

##  would require a  .333  ohm  at  75+  watt  resistor.

Jim   VE7RF


-----Original Message----- 
From: Adrian
Sent: Thursday, March 19, 2020 3:17 PM
To: Jim Thomson ; amps@contesting.com
Subject: Re: [Amps] Henry 2K-4 Failure

Thanks Jim, you can't beat words from those experienced.

I guess a cathode test plug could be made to substitute one tube
plugging into

the socket .A dead tube could have its base made up for this, with
resistor added to

cathode connections equalling the hot value.

Then interchange tubes on the remaining socket to compare.



vk4tux




On 20/3/20 3:32 am, Jim Thomson wrote:
> > Grid to cathode short & ?stayed failed? means you just need an
> > ohmmeter. No need to swap tubes, etc.
> >
> > Gerald, VE1DT
> ##   Nope.  The  grid  to cathode  short  only  happens  with  tube  fil 
> lit.....  not  when  cold.
> When  cold,  both  a HI  pot  tester....  and  also  a megger  wont  work 
> either.
> Jim    VE7RF
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