[ARC5] Headphones H-43 B/U

[WA5CAB at cs.com]

It's high but that would be 10K per receiver. And the pre-war Signal Corps 
R-2, R-2-A and R-15 receivers were all rated 12K. So it must have been 
doable.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 03/16/2014 05:20:08 AM Central Daylight Time, 
w7qho at aol.com writes: 
> Dennis,, Ken, et-al,
> 
> 20K sounds awfully high for a magnetic headphone. Crystal unit 
> maybe? "Scot's Headphone Museum Gallery" lists the H-43 B/U at 3000 
> ohms see <http://oldheadphones.com/crystal/gallery/gallery2.html>
> 
> Dennis D. W7QHO
> Glendale, CA
> 
> ********************
> On Mar 15, 2014, at 6:38 PM, Dennis Monticelli wrote:
> 
> >I have a pair and took measurements. Yes, they are 20K. They also 
> >have
> >VERY high sensitivity according to power measurements I made at 
> >MDS. When
> >I get home from my business trip I could share the numbers.
> >
> >Dennis AE6C
> >