5/30/2023 0 Comments Pultec schematic![]() One point to note: T2 should be wired to reverse phase. Unlike a Pultec, though, it is an active EQ, and it uses some pretty unusual circuitry – especially the high-cut section, which I don’t comprehend at all. The 627 is a line-level EQ with continuously variable low and high bell boost sections as well as high and low roll offs. One seems to have sold on eBay recently in the $7000 region. Why? We will get to that in a minute.Ī quick google search suggests that there are thought to be only 5 Fairchild 627 equalizers in existence. ![]() ![]() Now i wish I had measured the values of the triple-ganged frequency-select pots. I had never heard of the Fairchild 627 ‘Variable Equalizer,’ even though I recently sold an example of its (even-more-rare) predecessor the model 540, which in retrospect seems to be the ‘boost’ sections of the 627 plus a mic preamp plus a 20-watt cutter-head power amp. Apologies for the poor image quiality these came from the research department of a long-gone British broadcast-gear-manufacturer via some dampish papers that I purchased recently from a rare-books-dealer in London.
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