The Crystal Set Society used to sell the small straight-line capacitance ones, if I recall correctly. I built several sets and wave traps with them before I became a Ham and started loitering at swap meets. 

Jim Falls K6FWT 

On Apr 25, 2022, at 14:17, John Watkins via ARC5 <[email protected]> wrote:

 I also have the PRM-10, The complete coil set and a few spares.  Works great to set up antennas, and very stable.  I use an HP counter with a pickup loop for frequency control.  Also easy to use for spoting receiver freqs especially on my BC-348.

John WD5ENU


Sent from Yahoo Mail for iPad

On Monday, April 25, 2022, 15:28, MICHAEL ST ANGELO <[email protected]> wrote:

Oren Elliot made the capacitors for Heath. They are still in business.

https://www.orenelliottproducts.com/product-category/air-variable-capacitors/>

I wonder if they still stock the GDO capcitors? If so it would not be cheap.

Mike N2MS

> On 04/25/2022 2:44 PM Robert Nickels <[email protected]> wrote:
>

> I don't use a GDO much as I have better ways to measure resonance but
> the Millen and Measurements are weapons of choice when I need one.  Also
> the Heathkit Tunnel Dipper is handy and the battery lasts forever.
>
> About all I can say about the Heathkit GDO is that I have two that are
> undergoing "transition" on my bench.  A neighbor who flips houses gave
> me a bunch of stuff that came from a local ham's house, including two
> Heathkit GDOs, without coils, naturally. One rattled and when I opened
> it up about 2/3 of the rotor plates from the variable capacitor fell out
> so that sealed their fate. T
______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]

This list hosted by: http://www.qsl.net
Please help support this email list: https://www.qsl.net/donate.html
______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]

This list hosted by: http://www.qsl.net
Please help support this email list: https://www.qsl.net/donate.html