I get some microphonics if I tap on the chasis but this settles down quickly and certainly does not intrude on the music.My speakers are 98db sensitivity so show up problems like this.I used to have a Lux power amp that had bad microphonics.I sold this and later discovered my power supply was running up to 266 volts when it was meant to be 240 volts-this may have been a cause.It might pay to get your power supply checked.I had mine lowered at the transformer.Also stevem60 has a type of 300b which he reckons has very low microphonics.I'll ask him to post info on this.
What 300b valves do you find sound best in the Cabernet?I have tried the TJ meshplate which sounds nice tonally but I think the EH has much more precise imaging and tighter bass.I remember comparing the EH and the Western Electric and I prefered the EH!.
Does tube rolling just involve dunking the tubes in liquid nitrogen or does it have to be done when the moon is right and with the tube in a special cow horn- bio dynamic style?I have access to liquid nitrogen.
JT
What 300b valves do you find sound best in the Cabernet?I have tried the TJ meshplate which sounds nice tonally but I think the EH has much more precise imaging and tighter bass.I remember comparing the EH and the Western Electric and I prefered the EH!.
Does tube rolling just involve dunking the tubes in liquid nitrogen or does it have to be done when the moon is right and with the tube in a special cow horn- bio dynamic style?I have access to liquid nitrogen.
JT