[Heath] Heathkit CR-1

[pmarkavage at juno.com]

Leg work has already been done:
http://oldheadphones.com/crystal/info/heath.htm

http://www.hobbytech.com/crystalradio/crystalradio.htm Scroll down to the
down of the page.

There's several other sites that dabble in CR-1 type designs. Just Google
it.

Pete, wa2cwa

On Thu, 31 May 2012 04:56:54 -0000 "Kenneth G. Gordon"
<kgordon2006 at frontier.com> writes:
> I cannot figure out why the Heathkit CR-1(*) routinely sells for so 
> much on eBay.
> 
> Perhaps some kind soul would tell me what the attraction is?
> 
> Secondly, I see from the schematic that the only real inductor in 
> the CR-1 is labled 
> "Transformer", and also L1 and L2.
> 
> Does anyone have any specifications on this "transformer" they would 
> care to share?
> 
> It looks like it must be some sort of ferrite cored "loopstick" type 
> with a somewhat "lower 
> impedance" tap to the headphones.
> 
> I am toying with the idea of building a CR-1 clone from scratch 
> here, just to see if there is 
> anything unusual about the receiver.
> 
> Oh. Also, what is the real difference between the CR-1 and the 
> CR-1A?
> 
> Ken W7EKB