A ZH-270 is an extremely sophisticated piece of equipment, it does not look it from the outside but it is, proper AC power and grounding is suggested.
Power conditioning is sometimes a hit and miss proposition with any system, however it seems that the BPT is working out for most who try it, so certainly try it.
I believe Henry has a 96 model with the larger transformer for the Switching power supply, only about half a dozen amps were built with these in 96, they may emit a little buzz while working if the AC is not just right.
If my guess is right you maybe able to twist the wires around the trasnfromer with your fingers gently and reduce the buzz, do not do this with the amp pluged in or recently had on, or you'd be the one buzzing :)
Allan
Power conditioning is sometimes a hit and miss proposition with any system, however it seems that the BPT is working out for most who try it, so certainly try it.
I believe Henry has a 96 model with the larger transformer for the Switching power supply, only about half a dozen amps were built with these in 96, they may emit a little buzz while working if the AC is not just right.
If my guess is right you maybe able to twist the wires around the trasnfromer with your fingers gently and reduce the buzz, do not do this with the amp pluged in or recently had on, or you'd be the one buzzing :)
Allan