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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

AKSA's Lender Preamp with 40Vpp Output
AKSA's Lender Preamp with 40Vpp Output
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Old 9th November 2018, 10:09 PM   #881
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
I know I like 0.05% H2 and 10x less H3 and nothing else. It always sounds better this way. And on a zero feedback SE Class A amp, it will always beat a regular high negative feedback H3 dominant LTP front end based amp in a blind test. But, even an amp with only 0.005% H2 and monotonically descending harmonic profile will beat a H3 dominant amp that has lower THD.
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Last edited by xrk971; 9th November 2018 at 10:11 PM.
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Old 12th November 2018, 11:47 PM   #882
nzlowie is offline nzlowie  Australia
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Hi guys, about to start construction...... can you please confirm the errata data on post 777 and the start of the GB tread is current? Read most of the posts and it looks like everything is covered but I don't want to miss anything.

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Old 13th November 2018, 01:29 AM   #883
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
Yes, post 777 is it. If you have questions along the way, just ask here and we will try to answer in same day.
Good luck!
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Old 13th November 2018, 08:19 AM   #884
nzlowie is offline nzlowie  Australia
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Quote:
Originally Posted by xrk971 View Post
Yes, post 777 is it. If you have questions along the way, just ask here and we will try to answer in same day.
Good luck!
Good luck..... Hope luck isn't required? Just wanted to confirm those changes on 777 are all, once I start soldering not a lot stops me till I'm done!

So as I'm building as a pre not a HPA I can lower the gain?

Thanks, will post if I have any issues during the build. Great to know support is available.

Cheers
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Old 13th November 2018, 10:29 AM   #885
Puggie is offline Puggie  United Kingdom
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Sorry if this has been covered. but the different daughter boards, is these a difference in performance or is it purely down to preference of assembly?
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Old 13th November 2018, 06:35 PM   #886
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
Regarding DB's, it's mostly down to assembly as measured distortion between different ones are about the same. The TH version lets you add a big heatsink and use a 2SA1837 and boost bias current for headphone amp though. The miniMELF SMT version is tough to make since miniMELFs are hard to find in US at places like Mouser or Digikey - they were out of stock on lots of them so go 0805/1206 SMT if you want to make those. Technically, the SMT should have lower noise since parts are smaller and traces shorter.
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Old 16th November 2018, 02:33 PM   #887
maf_au is offline maf_au  Australia
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Originally Posted by GASCo View Post
These should be final:

MB: Mouser Electronics

DBTH: Mouser Electronics Resistor 2.2K added for gain for ACA.
Thanks for releasing the Mouser component Project lists for AKSA. That will make it easier to buy most of it from Mouser rather than half a dozen suppliers.
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Old Yesterday, 05:52 PM   #888
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
A new use for this Preamp. Bypass the M2 front end and autoformer for super quiet and powerful amp.

AKSA Lender Pass Hybrid M2 (ALPH-M2) Amp
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