[R-390] Tell me about Single Sideband Converters

[Craig]

Currently there is a CV-591A/URR model MSR-4 on ebay that probably doesn't work. Bid is now at $300 and will probably sell higher. Looks like a hint of blue paint on the face. Doesn't look like a good buy to me.

From what I can find on the net several different Single Sideband Converters were used with the R-390A.

Question: Of the many models available, which one works the best and what is the going price for one in working condition?

Thanks

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Craig Westerman
westerman at cableone.net