[Amps] Blowing out finals on a Icom 7300 using a Ameritron AL 80B. Help Please!

[Jim W7RY]

That part of the circuit never "sees" the transceiver. An open choke 
here causes other problems. Not this one.


73

Jim W7RY


On 6/6/2022 4:39 PM, Patrick Thompson wrote:
> There is probably a small rf choke from the pi network output to ground.
> The rfc is there to short hv to ground if the plate blocking capacitor
> shorts. Worth looking at and a possible safety issue.
>
> Pat. wa4tuk
>
> On Mon, Jun 6, 2022, 5:18 PM Ron W4BIN <ka4inm at gmail.com> wrote:
>
>>      Alton McConnell via Amps wrote:    (in part)
>>
>>> I suspect that we might need to find a HW 100 or 101 (tube type finals)
>> to use as an exciter
>>> until we get this issue tracked down.  What do professionals do about
>> exciters for problem
>>> amps?
>>> How do you test a 3-500Z to see if it is a tube issue?
>>> Are Icom 7300's compatible with AL80Bs?
>>> Does anyone have any thoughts?
>>     I think two gas tests are in order.
>>
>> --
>>      Ron  W4BIN - Understanding is much better than
>>                                         knowing how.MX
>>
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