Aleph** seems forever popular ( with reason) and there are myriad of iterations
Most of them being more or less ( but still more than enough for regular Greedy Boy) complicated and troublesome
This one made as platform for various power levels (rails , Iq, outputs IRFP150 or 240), also allowing use of any range of Toshiba/LS P channel JFets (mid Idss range one pair, all ranges two pairs per channel), same as J270/271 (two pairs per channel) and also mmbfj270/271 (two pairs per channel)
"Small" one (one universal or two iterations - level of Aleph 30/Aleph J) planned for Store, IAIMH doing all testing/part of logistic work - that one with just a pair of outputs, idea is to get package from Store with most important itsybitsies, rest is no brainer/no matching fun
You didn't hear that from me
ahem - this one, shown in #318 - not tested but sure it'll work; would I ever order pcbs - dunno
**Aleph is an Aleph is an Aleph - whatever suffix is - be it number or J; this one being J, scalable to whatever PSU you throw at it, with adequate casing; quirks few - ring of 2 as LTP CCS, LTP cascoded, emiter follower in between LTP and OS ........ barely just enough to be called Babelfish
Most of them being more or less ( but still more than enough for regular Greedy Boy) complicated and troublesome
This one made as platform for various power levels (rails , Iq, outputs IRFP150 or 240), also allowing use of any range of Toshiba/LS P channel JFets (mid Idss range one pair, all ranges two pairs per channel), same as J270/271 (two pairs per channel) and also mmbfj270/271 (two pairs per channel)
"Small" one (one universal or two iterations - level of Aleph 30/Aleph J) planned for Store, IAIMH doing all testing/part of logistic work - that one with just a pair of outputs, idea is to get package from Store with most important itsybitsies, rest is no brainer/no matching fun
You didn't hear that from me
ahem - this one, shown in #318 - not tested but sure it'll work; would I ever order pcbs - dunno
**Aleph is an Aleph is an Aleph - whatever suffix is - be it number or J; this one being J, scalable to whatever PSU you throw at it, with adequate casing; quirks few - ring of 2 as LTP CCS, LTP cascoded, emiter follower in between LTP and OS ........ barely just enough to be called Babelfish
There's already been a mini J done. Ask someone for gerbers.
https://www.wittnet.de/hi-fi/first-watt-pass-labs/aleph-j-mini
https://www.wittnet.de/hi-fi/first-watt-pass-labs/aleph-j-mini
that's different one from what I posted in post #318, previously shown by 6L6 during BAF 2021 Zoom happening
"uni" is in post #318, while ultra-easy/small one in final preparations for Store
I"m confused by the nomenclature, that schematic has a MOSFET front end, hence Aleph #, not J.
here it is, nothing really novel
disclaimer - as is, applicable for rails voltage range up to 30Vdc; for more (higher power) few resistor positions must be altered in value
Attachments
Hey there Zen, since we were talking RIAA preamps.
Here is quite possibly a really cool new kid on the block, possibly from the sunnyer side of the RIIA music street? 🙂
Fully discrete, class A, linear power supply with 60v rails, 32 matched fets…
Who knows, got me for damn sure Really curious 🎷🙂🎸
https://www.youtube.com/live/6Z5A71vILko?si=wiDVurLY5UgwQfAp
Here is quite possibly a really cool new kid on the block, possibly from the sunnyer side of the RIIA music street? 🙂
Fully discrete, class A, linear power supply with 60v rails, 32 matched fets…
Who knows, got me for damn sure Really curious 🎷🙂🎸
https://www.youtube.com/live/6Z5A71vILko?si=wiDVurLY5UgwQfAp
By my mistake my main stereo speakers passed 120 dB @ 20 hz in my big listening room.
According to my REW and cal. mic.
The windows seemed to just barely clinging on to the building at that particular sweep.🙂
But that was with the the really big Rotel 1200w dynamic per channel @1 ohm A/B.
My Twin ACAs in parallel spanked it… Slightly but clearly 😎
Current facts in ZML work
Several of you guys are waiting for ordered kits (various amps). Bummer is - Serbian post is under sort of General Strike....... in this moment lasting more than 3 weeks.
Same didn't happened in few last decades, and what's illustrating how all Governments are crooked (exceptions welcome), you can find public info about Strike only if you search for it.
Anyhow, logic dictates (human existence producing both logical and illogical patterns, go figure) - it must be ended sooner than later - Postal Service is important for functional country, any.
So, kits are packed, I'm just waiting for Strike end, then few days more to allow unclogging of their paths.
Just an illustration that I didn't escape to Maldives, meaning still in same place and still in same Workshop, here's what I'm working on lately (proper vid going to ootoobe when I'm in mood to make it); in short, working slowly to minimize/diminish outsourcing
ZM OmniInsourcerer
Several of you guys are waiting for ordered kits (various amps). Bummer is - Serbian post is under sort of General Strike....... in this moment lasting more than 3 weeks.
Same didn't happened in few last decades, and what's illustrating how all Governments are crooked (exceptions welcome), you can find public info about Strike only if you search for it.
Anyhow, logic dictates (human existence producing both logical and illogical patterns, go figure) - it must be ended sooner than later - Postal Service is important for functional country, any.
So, kits are packed, I'm just waiting for Strike end, then few days more to allow unclogging of their paths.
Just an illustration that I didn't escape to Maldives, meaning still in same place and still in same Workshop, here's what I'm working on lately (proper vid going to ootoobe when I'm in mood to make it); in short, working slowly to minimize/diminish outsourcing
ZM OmniInsourcerer
Attachments
