[Boatanchors] Heathkit SB-620

[Chris Codella, W2PA]

Here's a mixer I built to use a Kenwood SM-220 band scope (BS-8) with a 
Yaesu FT-1000D.  The same principle could be used to adapt your SB-620 
for the R-7000.

http://www.w2pa.com/Home/articles/SM-220--BS-8-Converter-for-FT-1000D

73,
Chris, W2PA

Peter A Markavage wrote:
> You could build a small solid-state 16.7 MHz mixer whose output is tuned
> to 6000 KHz.