Transformers for Tube Amplifiers: HOW TO DESIGN, CONSTRUCT & USE POWER, OUTPUT & INTERSTAGE TRANSFORMERS AND CHOKES IN AUDIOPHILE AND GUITAR TUBE AMPLIFIERS: Popovich, Igor S.: 9780980622386: Amazon.com: Books
How To Use A Tube Amplifier Choke | Top Tube Amplifier
TX364 - 150H Choke - Tube Amp Kits & Books, Tube Amps - London Power