For SETH ordering, contact
Jean-Francois Lessard


Peerless numbering
nomenclature Explained

Peerless used a prefix which denoted the type of transformer and a suffix noting how the unit was housed. Originally, this part number (back in 1948) was S-240-Q. The "Q" cases were proprietary items made exclusively for Peerless. If you've ever seen an original Q case, you know it's beauty. Unfortunately, the tooling is long, long gone. We now build these with bell end caps which Peerless used the letter A to denote.

The letter S stood for large signal output transformer. K was for input trans. E was for impedance matching. R was for combination plate and filament transformer. C was for choke. L was for audio inductor (what we might call a plate choke today).