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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 10th March 2019, 12:24 PM   #1091
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
Another happy Aksa Lender builder - headphone amp and ACA preamp combo.

Aksa Lender HPA

Click the image to open in full size.
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Old 11th March 2019, 07:32 AM   #1092
AKSA is offline AKSA  Australia
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Stunning work, Spiggs...... congratulations and welcome to the club!

Hugh
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Old 12th March 2019, 05:48 AM   #1093
spiggs is offline spiggs  United States
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Originally Posted by AKSA View Post
Stunning work, Spiggs...... congratulations and welcome to the club!

Hugh
Thank you Hugh, so pleased to be a member. I hope I did your circuit justice. I posted some initial listening impressions in the HPA thread at xrk971's prompting and after listening to it some more really feel like I have something special. It sounds fantastic driving the ACA or my headphones. Just magic as the evening wanes and the music plays. Time to spin another record.
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Old 13th March 2019, 12:33 AM   #1094
AKSA is offline AKSA  Australia
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You know, Spiggs, given your professional background you have taken incredibly well to building electronics and casework! I think you should take a bow and remind yourself that you could have been skilled tradesman, and maybe more!

Yes, you did justify my circuit, thank you, as indeed has X. He is exceptional and builds things more quickly than I design them, we make a great team, not to mention the brilliant pcb design from Jean Paul.

I just googled Huntington Beach, which I'd remembered from the Reynolds Brothers wave motor which was installed off an industrial wharf in 1909. I marvelled at the population expansion between 1960-70, the Surf era! Ah, to remember the surfie chicks, the Beach Boys and Ford T-birds! It looks a lovely place to live.

HD
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Last edited by AKSA; 13th March 2019 at 12:41 AM.
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Old 13th March 2019, 09:08 AM   #1095
spiggs is offline spiggs  United States
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Ah well you should see my spreadsheets, now those are works of art Life choices.

That bit of history was very interesting, thanks for that. The wave motor seems a sound concept, perhaps its' day will come again with some of the efficiencies afforded by more modern design and manufacture. My parents were part of the population boom from 1960-70 having moved out here, I showed up around that time as well. Huntington Beach does have it's charm, car and surf culture abounds.

Spent another night listening to music through the new preamp, it functions beyond my expectations. Now maybe some new speaker cabinets, then that will be the last piece I am sure, except for maybe a phono pre, those look nice to and the computer in the office could use better quality audio as well....
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Old 13th March 2019, 09:24 AM   #1096
Vunce is offline Vunce  United States
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AKSA's Lender Preamp with 40Vpp Output
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Originally Posted by spiggs View Post
Spent another night listening to music through the new preamp, it functions beyond my expectations. Now maybe some new speaker cabinets, then that will be the last piece I am sure...
Very nicely done Spiggs
The blending of wood and metal has always been pleasing to me.
Enjoy your new AKSA Lender, itís a fantastic preamp!

Oh yeh, probably will not be your last piece!! HeeHee
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Old 13th March 2019, 03:17 PM   #1097
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
Quote:
Oh yeh, probably will not be your last piece!!
Yes, we have the Yarra preamp to look forward to for that! PCBs should be here tomorrow, parts maybe Friday.

For those of you who are not familiar with the new Yarra preamp, it is a motherboard for the Melbourne preamp core daughterboard. The Melbourne is an Aksa Lender with DC-coupled output as an option (so dual rails). It can be used to drive 0dB gain power amps to 50wrms into 6.8ohms.
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Old 18th March 2019, 03:24 PM   #1098
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
More subjective reviews of the Aksa Lender as a pre- and HP amp by Spiggs:

Aksa Lender HPA

Internal construction details:
Click the image to open in full size.
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Old 13th April 2019, 07:40 PM   #1099
vlv81 is offline vlv81  New Zealand
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Hi all

In post 1 it refers you to the Errata post later in the thread. I come up with error 404 when clicking on the revised BOM. I am currently using the one with JPS64 28.11.2017 on the bottom as a reference.

Error 1 states R141 should be 10K, not 220R. In the BOM R141 and R142 are listed as 220R. Just want to double check that R142 is also 10k and I haven't lost my mind completely. To me they are on the schematic as R14 10k, one for each channel, hence the 1 and 2 after R14. The simpleton will now return to the back of the class, facing the corner with the dunces cap on... I ordered them both as 10k but a little voice is asking if I was sure

Second question: I have an old pre-amp chassis I wanted to re-purpose. It has an internal height of 63mm with the lid on (just shy of 2 1/2 inch). Will this be enough height?

Several items I ordered are on back order but this will give me the time to get set up again and re read and take notes from the thread.

Been a bit short of a year since I bought the boards from the ETSY shop. Reasonably serious health issues arose for my eldest son and I'm finally getting motivated enough to get back into this and an Aleph J.

Thanks
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Old 14th April 2019, 01:34 AM   #1100
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
Vlv81,
Sorry to hear about your son’s health issues hope he has recovered. Please go to the GB thread for the latest build info. There is a revised BOM shown in post 1 of GB thread and link works.

AKSA's Lender Preamp with 40Vpp Ouput GB

Indeed, R141 needs to be 10k.

Good luck!
X
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