[Amps] Henry 2K-4 Failure
Adrian
vk4tux at gmail.com
Fri Mar 20 10:50:24 EDT 2020
Yes I earlier divided 10 volts by 15 amps to get 0.666 series resistance
divided by 2 (tubes)
1.5 ft 16 gauge nichrome coiled is a inexpensive option.
On 21/3/20 12:16 am, Jim Thomson wrote:
> ## 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 at 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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>
>
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