{Collins} Looking for connection info for Heath SB-620 scanalyzer for use in 75S-3B

[Bob Tufts <rbt@xxxxxxxxxxxxxxx>]

Hi people. I just picked up a Heahtkit SB-620 "scanalyzer" with the 
corect 455 khz coil for Collins IF, but it did not come with a manual.

Despite many internet searches I could not find the details on how to 
tie into the IF mixer stage ahead of the filters so I could use the 
panadapter function   I plan to use the spare phono jack on the back, 
but any recommendations on isolation caps/resistors to give a good 
signal but not adversely load the IF stage? I did see some brief 
comments (not related to Collins use) talking about choosing non-lossy 
coax. I also found an article where someone was converting a SB-620 
setup for 455 khz back to Heathkit 3395 khz IF and they had added a 
transistorized isolation buffer amp (but inside the SB-620).

I welcome any recommendations/experience.

-Bob WA1KPA