[Boatanchors] Heathkit SB-620

[Jim Wiley]

I was faced with a similar problem some years ago when I wanted to use a 
Heath HO-13 band-scope (input 455 KHz) with a Drake R-4C receiver (IF 
approximately 5.5 MHz, if I remember correctly) .  I ended up building a 
small crystal-controlled converter using 6BE6 mixer, but using a 
separate 6C4 oscillator.  I  used a  re-tuned  4.5 MHz TV sound IF 
transformer for the input, and decided to use an  untuned output with 
just an RF choke in the 6BE6 plate circuit,  and got great results.   
The output bandwidth was sufficiently wide so I could easily display a 
range of 100 KHz centered on 455 kHz with good results.  Not precision 
test equipment, to be sure, but certainly good enough to see what was 
going on up and down the band.   For a circuit, I adapted the 10 MHz WWV 
converter shown for several ARRL handbooks in the mid 60s. 


- Jim, KL7CC



David wrote:
> Greetings. Since I got no response on the Heathkit list, I will try here. I 
> have a SB620 that I would like to hook up to a R7000 that has a 10.7 meg IF 
> output. The 620 is set up for 6000kc range at the present time. Has anyone 
> used one on the R7000 and if so what type of interface did you use.
>
> Thanks for any info.
>
> Dave   VA7DG 
>
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