[Amps] Tips For Winding a Plate Choke

[Martin Sole]

Except when they don’t.

Case in point, 3 tube Alpha 78, and probably 76 or similar rf decks, where you want real all band coverage.

The Ameritron choke is naturally self resonant around 11 point something MHz or so I read. Now in the confined space of the Alpha deck the adjacent metalwork lowers this a bit to the extent that fireworks are pretty much guaranteed on 10.1 MHz.

Might be fine in more spacious cabinets or where 10MHz operation is not a concern.

Presumably a minor rewind, removal of turns might be enough.

Just saying.

Martin, HS0ZED 




Sent from my iPhone

> On 6 Oct 2019, at 11:52, Jim <jimw7ry at gmail.com> wrote:
> 
> Save yourself some headaches, and buy an Ameritron choke from MFJ. They work very well. They are about $30.00 or 35.00.
> 
> 
> Thanks
> 73
> Jim W7RY
> 
>> On 10/5/2019 9:37 PM, Doug Renwick wrote:
>> I need to re-wind a plate choke. I could use any tips for this procedure.
>> Doug
>> 
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