[HBR] HBR-67

[Tim Shoppa]

N2EY wrote:

> Yes - in the 1967 Handbook!
> It's a very straightforward design. Basic rx tunes 80/75 meters, 
> converter for the other bands is switched in ahead.
> 
> IIRC 80/75m section is 7360 mix (single-ended), 2-6BA6 IF, SS diode 
> product detector, 12AX7 audio/AGC. Not sure what was used for the BFO 
> and audio output. Converter used a compactron for the mixer, oscillator 
> and cathode-follower.
>
> RX has audio AGC and S-meter, SSB-bandwidth mechanical filter, built-in 
> solid-state power supply with VR tube. B+ is only 180 volts IIRC. Dial 
> was a Miller two-speed, not an Eddy 898.
> A good basic design but I wouldn't copy it exactly.

Duh... I should've realized that searching every issue of QST from 1967
for the HB-67 would not yield a clue, after I realized who W1DX was and
how he could put whatever he wanted into the handbook :-).

The 1969 version is very nearly what you describe - and I think the
converter is exactly what you describe.

I could imagine making the RF and oscillator coils be plug-ins
to allow bandchanging in the radio itself, but with just a 455kHz
IF it would show a lot of images above 40M.

Tim.