[ARC5] Headphones H-43 B/U

[Kenneth G. Gordon]

On 15 Mar 2014 at 15:16, Scott Johnson wrote:

> The H-43 was packed with the PDR-27 series of Geiger survey meters, among
> others.
> 
> Scott W7SVJ

I suspect that the H-43s are 3K ohms, while the later H-43B/U are the 20K 
jobs.

Ken