[HBR] HBR-8 Questions

[Helmut Usbeck]

>Thanks for the replies and info Kees and Helmut;
>
>Ok, I understand you need rectification to receive AM, guess I=
 was
>just
>confused about the BFO since I thought BFO carrier injection=
 was
>required to
>receive CW and SSB regardless of the product detector? then why=
 shut
>it off?
>
>Glenn K2KL

I just went over the schematic of the HBR-8/11.  You're 
right...there's an on/off switch for the BFO.  Also just the=
 output 
of the BFO is switched on or off.  The plate voltage is still on.=
  
Which means it's still oscillating.  Very interesting!  Perhaps=
 this 
was, as Microsoft sez nowadays, a feature?
-- 
Helmut Usbeck, WB2ADT vze2gmp4@verizon.net on 04/24/2002