>
>> >I recently got an L7 Amp with a bad 3-500Z. The tube plate had shifted and
>> >shorted to the grid. This caused the RF choke that Drake uses in the grid
>> >to ground circuit to go up in smoke.
>> >
>> >Does anyone know the value of the RF choke used and where they can be
>> >obtained?
>
>The chokes are available from Drake ... part number 3520700
>
The chokes offer virtually no protection against grid/fil. shorts. I
would use 250mA fuses or a fusing resistor.
cheers
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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