On 11/29/2015 6:03 PM, Michael Black wrote:
On Mon, 30 Nov 2015, Cursitor Doom wrote:

On Sun, 29 Nov 2015 16:16:27 -0800, Jeff Liebermann wrote:

Sorry, no recommendations as all my stuff is ancient.

So's a lot of my stuff. But there's nothing wrong with old gear IMO it's
the quality of it and whether it's in calibration that counts. The only
issues with GDOs IME are that they're not too bad for the lower frequency
RF stuff, but hopeless for anything higher.


Huh? VHF and UHF is where they really worked well, because at lower
frequencies, a lot of the coils were shielded. There were GDOs that
worked well at VHF and UHF.

Michael

Best one I ever used was the tube version of the Millen.
I switched to the solid state version and regretted it.
Much less sensitive and more fiddly than the tube version.
Tunnel dipper was the worst for sensitivity.

If ham swapmeets are any indicator, most GDO's
available second hand
are missing some or all of the coils.