[ARC5] Making Stable VFO for 2 MHz

[J. Forster]

> On 29 Jun 2011 at 15:21, J. Forster wrote:
>
>> A Vishay RF choke from Mouser, about the size of a 1 Watt resistor.
>> I'm working on the keying at the moment.
>
> I know those things quite well. In my experience, they are VERY
> unstable inductors.

Yes. I never said it was any good. It's the only thing I have to play with
at the moment. The Radio Shack toroids are EMI suppression material and so
lossy, they won't oscillate.

> They are horribly temperature sensitive and were
> never designed to be part of a frequency-determining network. They
> work OK as an RF choke in certain circuits, but I would never attempt
> to use one in a VFO.
>
> What is the value of the inductance which you need?

Roughly 100 uH. I need something standard as I will eventually need about
8 pcs.

Best,

-John

===============

> Ken
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