Was the Hitachi/hibachi refurb effort worth it? I've been curious about those old lateral mosfet amps for a while, and have seen the model you have pop up on E-pay from time to time.
it's worthy
well , 'twas more brainfood for Baby DiyA than anything else
it isn't comparable to any Papamp in any way , but pretty neat summer amp , or perfect amp for garage system , or kitchen or .......
now seriously - helluva music for 100 greenies and some work and few bitsies
well , 'twas more brainfood for Baby DiyA than anything else
it isn't comparable to any Papamp in any way , but pretty neat summer amp , or perfect amp for garage system , or kitchen or .......
now seriously - helluva music for 100 greenies and some work and few bitsies
I have the old original app note from Hitachi for the lateral mosfets featuring a couple of amp designs using cascaded differential stages. Is you amp similar in design?
I have a lateral output amp design in the works that might prove interesting.
I have a lateral output amp design in the works that might prove interesting.
Feel free t'annoy others as much as you can.
(for the foreseeable future, I'm only interested in sizeable boxes, 6.5' length minimum and preferably with a beach & bridge proof coating)
Re my previous post - I visited Zen's link to his page describing the Hitachi refurb/redesign, and answered my own silly-*** question. Interesting reading...
I just remembered I have a preamp design from back in the 1989/1990 time frame utilizing cascaded complimentary differential jfet stages (inspired by the Hitachi app note) with small mosfets at the outputs (Supertex mosfets with smallest die (VN/VP01) in TO-220 package - not made any more). The preamps are more or less complete, but probably need tweaking, dust removal, and corrections for the RIAA equalization filter. It might be interesting to wake them up, package them in some rudimentary way, and haul them to BA 16. The design is way more complex then what I usually do these days. It may be interesting to see if the extra fiddling around is worth it. The boards (homemade PCB) are also a showcase for lots of obsolete parts.
I just remembered I have a preamp design from back in the 1989/1990 time frame utilizing cascaded complimentary differential jfet stages (inspired by the Hitachi app note) with small mosfets at the outputs (Supertex mosfets with smallest die (VN/VP01) in TO-220 package - not made any more). The preamps are more or less complete, but probably need tweaking, dust removal, and corrections for the RIAA equalization filter. It might be interesting to wake them up, package them in some rudimentary way, and haul them to BA 16. The design is way more complex then what I usually do these days. It may be interesting to see if the extra fiddling around is worth it. The boards (homemade PCB) are also a showcase for lots of obsolete parts.
Hey dodos. Long time no visit. Lots going on including results from the doctor.
I am going to die.
Thankfully it isn't likely to happen soon unless I forget to look both ways before crossing.
Physio starts next week and the cardiologist is on Tuesday. If you don't see me posting for a while, you'll know I forgot to look both ways. 🙂
I am going to die.
Thankfully it isn't likely to happen soon unless I forget to look both ways before crossing.
Physio starts next week and the cardiologist is on Tuesday. If you don't see me posting for a while, you'll know I forgot to look both ways. 🙂
feel free to put me in ya will , all Altec drek is going to OPLDF
....... when we both are deep in 90-ies
If you don't see me post for a while, you'll know I bumped into a viagra steal on the web, changed my name to 50 Sucks and broke my neck while recording the 'reach dick or die trying' album.
Big C. , Jaccolina is just verrrrrry glad that you are going to be here in next half of century
that's why increased chance of autoF
that's why increased chance of autoF
Hey Cal, you almost scarred me. 🙂 Yes, we are all going to die, the only question is what can we do in the meantime 😀
Somenody likes big speakers, somebody viagras, mosfets, tubes...
But the most important, whatever you do (before you die) don't forget to post here 🙂
https://youtu.be/p-Bhm3evx30
Somenody likes big speakers, somebody viagras, mosfets, tubes...
But the most important, whatever you do (before you die) don't forget to post here 🙂
https://youtu.be/p-Bhm3evx30
I was kinda hoping you'd say you'll post some physio shots, something in tights maybe.
I say it again : 50 Sucks, over 50 too
