[ARC5] Headphones H-43 B/U

[Kenneth G. Gordon]

On 15 Mar 2014 at 15:52, Rod Hogg wrote:

> Ken,
> Doing a "Google" on them, H-43B/U, comes back showing them to be 3000 ohm
> and were designed to be used with a Geiger counter......?? Made by different
> manufacturers....says they work well with crystal radios.

Thanks, Rod. I found that page...and another one which is a military list of 
headphones, loudspeakers, mics, etc.

In that one, it says that the H-43-B/U is 20,000 ohms

Gotta do some more research.

Ken W7EKB