Spectra Sonics 610 Stereo Link

[inkster]

Has anyone had experience linking a pair of vintage Spectra Sonics 610 compressors?
Years ago I ordered the link accessory from William Dilley which turned out to merely be a 5.6uf polycarbonate cap with screw terminal connectors attached via leads.
Never really worked all that well(if at all) and I was thinking of messing with a buffer to get better results but I'm open to any suggestions.
Schematic with the EXT stereo link is on page 21 of the attached PDF.

Cheers

 

[thomasdf]

Following ! Wondering the same

 

[inkster]

Following ! Wondering the same

Have you encountered the same issue?
Here's the hand drawn cards.

 

[thomasdf]

I have no 610 but I've read the manuals and looked at the schematics and wondered what that gizmo was

 

[kags]

The behavior of the 610 is like no other compressor/limiter in that the dynamic range seems to be what triggers comp vs. limiting vs. both. Perhaps the stereo link is doing its thing? Below is how the newer units describe the link condition, which seems to imply a different type of link than other compressors use. Maybe contact the company, which is still in business to see if they have changed the circuit for the link function over the years. The current units use a TS jack to link units and no special stereo adapter is required.

"Stereophonic Operation
The interconnection couples the attack and release action of the limiting and compressing functions of the two units. The input
(compression/limiting) and slope controls on either unit may be independently set for the desired mode of operation. However, when
the attack action of either unit is activated, the other will follow so as to maintain the stereophonic perspective. The release action will
follow the fastest setting on either unit. Prior to differing applications, the accessory may be switched in or out of the circuit as
desired.
¼” TRS cable required for two channel operation."