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Some of you guys might recognize or own this cheap head amp. Bought two of these many years ago from PE for ~$70. They can now be found all over the net for about the same price. This particular variant uses the 12au7 instead of the more popular 12ax7.
Definitely, IMO, not a highly resolving sound but very easy to listen to, powerful, and fun type of sound. My Aune and both boy's Schitt and cmoy headamps are more resolving. Anyhow, the tube in one of them turned white and it came to a halt. A new tube did not remedy the situation.
I've been on [https://rockgrotto.proboards.com/")] for years while rarely posting but none the less, enjoying the chatter.
Time to revisit an old mod thread specifically aimed at this cheap little headamp. https://rockgrotto.proboards.com/thread/5297
I'm really liking Mouser. They have a huge parts selection and parts are always well packed and arrive on time. Take note PE!
Time to mod. New irl530 to replace the irf630 that rolls off the highs, better lm317at voltage regulators, pair of 5k trim pots to dial in the bias which comes way off from the factory, and real Nichicon caps to replace the oem imitation Nichicon caps. There is also a crosstalk mod involving cutting a trace and solder a jumper. Still have the old original to compare it against.