[NJARC] Help Identifying A Radio

[Al Klase]

Hi Don,

I can't ID the particular set, but I can tell you how to 
wire what you've got.  The second variable cap is almost 
certainly a regeneration control.  It goes between the 
battery end of the tickler and ground.  There may need to be 
an RF choke between the tickler and the headphones.  Could 
well work with out it.  If you can't stop the regeneration, 
you need the choke.

The rheostat will control regeneration, but it's clumsy, and 
is really just used to compensate for sagging A-battery 
voltage.  A rheostat of about 6 ohms would suggest a 201A 
tube.  A higher value would indicate a '99 or 30.

I'm sending a drawing in a separate e-mail.  If anyone else 
needs to see it, just ask.

Regards,
Al

Don Ehrlich wrote:

> I have this old homebrew broadcast receiver built on a breadboard.
> It looks like it has never been finished and I have no history for the
> thing.
> 
> I have pictures and description on my web page at
> http://www.qsl.net/k7fj/
> 
> Just go there and click on 'Mystery Radio' to see it.
> 
> I would really like to know more about it ... that is, if there really
> is anything to know.  I am thinking of rebuilding
> it and, if there was any sort of design published for it then I want
> to be faithful to that design.
> 
> My pictures do not show the wooden box that the panel was mounted in.
> The box was nailed together from scrap lumber and is a wreck.
> 
> I would appreciate any help you can offer.
> 
> 
> Thanks,
> 
> Don K7FJ
> 
> 
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> 

-- 
Al Klase - N3FRQ
skywaves at webex.net
Flemington, NJ 08822
Web Page:  http://www.webex.net/~skywaves/home.htm