[HBR] Fw: Building a HB-65.... (sort of)

[hbr@mailman.qth.net]

I wanted to make a couple of further comments.  First, that I actually 
*do* know how to spell toroid and I am now going to teach my 
spelling checker.   

Second, I think that Hugo's HB-65 project (with a pentode replacing 
the 7360) makes an excellent 'first serious receiver' project.   That 
design should be stable enough and have the dynamic range and 
selectivity needed to be perfectly usable on 80 and 40 meters; with a 
good crystal controlled converter fronting it (as in the HB- 65 
handbook article), the sky's the limit -- certainly it would go to 10 
meters.    

At the same time, it's free of critical circuits except for the usual 
issues with a VFO -- in other words, about as free of such circuits as 
is practical.   Using double conversion with a couple of 100 kcs 
transformers for selectivity rather than a mechanical filter as in the 
HB-67, it's easier to get avoid leakage problems and the higher first 
IF (compared to 455 kcs in the HB-67) is an advantage.   With the 
gain and selectivity distributed as they are, the problems of a beam 
tube gone, and a fairly low parts count, this design ought to find a 
place in many 'homebrew station' setups.  

We'll be watching for pictures and further reports, Hugo!

Walt Hutchens
KJ4KV