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Old 28th December 2019
Gear Maniac

If the Summit SA990 op-amp is so different that the 990s that I (and others) make are "incompatible" with Summit equipment, then perhaps Summit should not be calling their op-amp a "990" at all. Seems to me it is their op-amp that is incompatible.

But of course, it is BS on their part. And Summit still owes me $2000 from years ago, when I sold them gold-plated pins and black-anodized aluminum potting shells to help them out. As the saying goes, "No good deed goes unpunished."

I have sold many of my 990 op-amps to Summit owners and repair people to replace fried Summit SA990 op-amps.

My 990 web page:

Thank you very much.

John Hardy
The John Hardy Co.