Mercury Magnetics Fender Blues Jr output transformer pn FBLJR-OM. This is the 4-8-16 ohm multi tap output transformer.
If you’re reading this, you know that the Mercury is the finest transformer on the planet. Tone Quest magazine has gone on record numerous times about the quality and vintage sound reproduction of Mercury products.
JMI Music is proud to be a Mercury Magnetics Factory Authorized Dealer and every item we sell is covered by the Mercury New Parts Warranty.