Unfortunately I don’t own a BHK amp. I currently own a pair of Stellar M-1200’s which use the same size tubes as the BHK Preamp. I hope to own a pair of BHK amps some day soon! I use the Gold Lion tubes in my M1200’s and I’m very pleased with them. If you do a search for BHK amplifier tube rolling rolling I’m sure you will find plenty of info!