[NJARC] WWI headphone impedance

[Al Klase]

Alex,

The headset will have an impedance of about 10K ohms. 
They're pretty sensitive, so a volt or so of signal should 
be more than enough.

Al

Alex Magoun wrote:

>     Joel Cohen is working with me on  a number of exhibit projects for the David Sarnoff
> Library, one of which involves attaching a block oscillator to our telegraph key and a
> pair of WE 509W headphones.  He's not on the internet, so I'm asking what's the
> impedance of the headphones and will the block oscillator drive them?
>     thanks,
> Alex Magoun
> 
> --
> Alexander B. Magoun Ph.D.
> Executive Director
> David Sarnoff Library
> CN 5300
> Princeton NJ 08543-5300
> 
> 609-734-2636
> f: 609-734-2339
> amagoun at davidsarnoff.org
> http://www.davidsarnoff.org/
> 
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-- 
Al Klase - N3FRQ
skywaves at webex.net
Flemington, NJ 08822
Web Page:  http://www.webex.net/~skywaves/home.htm