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AKSA's Lender Preamp with 40Vpp Ouput GB

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xrk971

xrk971

Founder of XSA-Labs
Joined 2012
etsy.com/shop/XRKAudio
Paid Member
I just hooked up this preamp to my main system with an Aleph J (SE Class A, 25w) and my 10F/RS225 FAST speakers. Incredible sound - a great preamp really makes a difference with some of these lower gain Class A amps. The whole system just came alive.

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xrk971

xrk971

Founder of XSA-Labs
Joined 2012
etsy.com/shop/XRKAudio
Paid Member
GB Status Update...

Boards for GB#2 have completed production and preparing for shipment.

—— List for GB #2 - Closed ——

Thimios - 1 set SMT, Paid
Pinnocchio - 1 set SMT, Paid
Mituisho - 1 set SMT, Paid
Alurudin - 1 set TH, Paid
muthumuthiah - 3 sets all TH, ship all with order from GB #1, Paid
jwjarch - 1 set TH, Paid
jwjarch - 1 set of TH daughterboards only, Paid
jwjarch - 1 set SMT 0805/1206 (shipment to be combined with above), Paid
briansz - 2 set TH, Paid
steefdebruijn - 2 sets TH + spare set SMT daughterboards, Paid
jmc207 - 2 sets: 1 TH and 1 SMT; +1 spare set TH daughterboards, Paid
marcus22ch - 2 sets SMT, Paid
vanofmonks - 1 set TH, Paid
pfisl - 1 set TH, Paid
neoinc - 1 set TH, Paid
redarc12 - 1 set of TH daughterboards only, Paid
gtose - 1 set SMT 0805/1206 version, Paid
Vunce - 1 set TH plus 1 spare set of TH daughterboards, Paid
Malvin - 1 set SMT, Paid
arthur - 4 sets, 2 TH & 2 SMT, Paid
cowneko - 1 set SMT 0805/1206, Paid

---- List for GB #3 ----
nania - 1 set SMT, Waiting List to start GB3
Pierre QuiRoule, 1 set TH or SMT (?), waiting list
jugi63, 1 set TH or SMT (?), waiting list
bk856er, 1 set TH or SMT (?), waiting list
Ft0601, 1 set TH, waiting list
Click to expand...

Pcgab, I have a spare set of TH daughterboards I can send you right away.
 
xrk971

xrk971

Founder of XSA-Labs
Joined 2012
etsy.com/shop/XRKAudio
Paid Member
The new SMT 0805/1206 daughterboard has been verified to work. This build is using 10R degeneration resistors (R5/R6) and 12k feedback (carbon film) resistor. I am using two 4k7 in series to get 9.4k (specified 9.1k on schematic).

Closeup before installing on MB (I used solder paste from a hypodermic needle, heated with a soldering iron tip):
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Installed on MB and playing music (it's the one on the left):
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Closeup of the new tested SMT daughterboard:
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  • Aksa-Lender-SMT-0805-1206-verified-closeup.jpg
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  • Aksa-Lender-SMT-0805-1206-verified-testing-MB.jpg
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  • Aksa-Lender-SMT-0805-1206-verified-testing-MB-cloesup2.jpg
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xrk971

xrk971

Founder of XSA-Labs
Joined 2012
etsy.com/shop/XRKAudio
Paid Member
GB status update:

—— List for GB #2 - Closed ——

Thimios - 1 set SMT, Paid
Pinnocchio - 1 set SMT, Paid
Mituisho - 1 set SMT, Paid
Alurudin - 1 set TH, Paid
muthumuthiah - 3 sets all TH, ship all with order from GB #1, Paid
jwjarch - 1 set TH, Paid
jwjarch - 1 set of TH daughterboards only, Paid
jwjarch - 1 set SMT 0805/1206 (shipment to be combined with above), Paid
briansz - 2 set TH, Paid
steefdebruijn - 2 sets TH + spare set SMT daughterboards, Paid
jmc207 - 2 sets: 1 TH and 1 SMT; +1 spare set TH daughterboards, Paid
marcus22ch - 2 sets SMT, Paid
vanofmonks - 1 set TH, Paid
pfisl - 1 set TH, Paid
neoinc - 1 set TH, Paid
redarc12 - 1 set of TH daughterboards only, Paid
gtose - 1 set SMT 0805/1206 version, Paid
Vunce - 1 set TH plus 1 spare set of TH daughterboards, Paid
Malvin - 1 set SMT, Paid
arthur - 4 sets, 2 TH & 2 SMT, Paid
cowneko - 1 set SMT 0805/1206, Paid

---- List for GB #3 ----
nania - 1 set SMT, Invoice sent
Pierre QuiRoule, 1 set TH or SMT (?), Need PayPal address
jugi63, 1 set TH or SMT (?), Need PayPal address
bk856er, 1 set TH or SMT (?), Need PayPal address
Ft0601, 1 set TH, Need PayPal address
Click to expand...
 
xrk971

xrk971

Founder of XSA-Labs
Joined 2012
etsy.com/shop/XRKAudio
Paid Member
GB2 Status Update...

GB #2 Closed
Thimios - 1 set SMT, Paid
Pinnocchio - 1 set SMT, Paid
Mituisho - 1 set SMT, Paid
Alurudin - 1 set TH, Paid
muthumuthiah - 3 sets all TH, ship all with order from GB #1, Paid
jwjarch - 1 set TH, Paid
jwjarch - 1 set of TH daughterboards only, Paid
jwjarch - 1 set SMT 0805/1206 (shipment to be combined with above), Paid
briansz - 2 set TH, Paid
steefdebruijn - 2 sets TH + spare set SMT daughterboards, Paid
jmc207 - 2 sets: 1 TH and 1 SMT; +1 spare set TH daughterboards, Paid
marcus22ch - 2 sets SMT, Paid
vanofmonks - 1 set TH, Paid
pfisl - 1 set TH, Paid
neoinc - 1 set TH, Paid
redarc12 - 1 set of TH daughterboards only, Paid
gtose - 1 set SMT 0805/1206 version, Paid
Vunce - 1 set TH plus 1 spare set of TH daughterboards, Paid
Malvin - 1 set SMT, Paid
arthur - 4 sets, 2 TH & 2 SMT, Paid
cowneko - 1 set SMT 0805/1206, Paid

---- List for GB #3 - Still Open ----
*nania - 1 set SMT, Invoice sent
*Pierre QuiRoule, 1 set TH, Invoice sent, please confirm TH or SMT MELF or SMT 0805/1206
*jugi63, 1 set TH, Invoice sent
*bk856er, 1 set TH, Invoice sent, please confirm TH or SMT MELF or SMT 0805/1206
*ft0601, qnty 2 complete sets TH, Invoice sent
Click to expand...

I will start preparing GB2 packaging and labels for shipping out over next few days.
 
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xrk971

xrk971

Founder of XSA-Labs
Joined 2012
etsy.com/shop/XRKAudio
Paid Member
Vunce said:
Great news X!
Looking forward to pair the AKSA Lender Pre with my Stereo Big MoFo:)
Click to expand...

This is where I am going to build a dedicated Aksa-Lender pre for use with my new MoFo under construction. Finally starting to make a stereo setup with a baseplate and mounted heatsinks. This is the heaviest amp I have - about 30lbs (!), mostly those steel core MOTs and the heatsinks.

652928d1514214046-build-mofo-03f579bc-bdc9-4d9e-bb51-abed70b6d817-jpeg
 
B

briansz

Member
Joined 2005
Vunce said:
Same here. I wasn't comfortable with the heat generated by the increased bias so I went with massive vertical heatsinks!! When completed, probably tip the scales about 35-40lbs:)
Click to expand...


Imagine a four channel version with tube steel frame and MOT's I'm working on the design for, my guess is 60+ pounds with two SMPS bricks integrated into the lower part of the chassis. It will be an anchor for sure.......... :D
 
xrk971

xrk971

Founder of XSA-Labs
Joined 2012
etsy.com/shop/XRKAudio
Paid Member
GB Status Update...

GB #2 Closed
Thimios - 1 set SMT, Paid
Pinnocchio - 1 set SMT, Paid
Mituisho - 1 set SMT, Paid
Alurudin - 1 set TH, Paid
muthumuthiah - 3 sets all TH, ship all with order from GB #1, Paid
jwjarch - 1 set TH, Paid
jwjarch - 1 set of TH daughterboards only, Paid
jwjarch - 1 set SMT 0805/1206 (shipment to be combined with above), Paid
briansz - 2 set TH, Paid
steefdebruijn - 2 sets TH + spare set SMT daughterboards, Paid
jmc207 - 2 sets: 1 TH and 1 SMT; +1 spare set TH daughterboards, Paid
marcus22ch - 2 sets SMT, Paid
vanofmonks - 1 set TH, Paid
pfisl - 1 set TH, Paid
neoinc - 1 set TH, Paid
redarc12 - 1 set of TH daughterboards only, Paid
gtose - 1 set SMT 0805/1206 version, Paid
Vunce - 1 set TH plus 1 spare set of TH daughterboards, Paid
*Malvin - 1 set SMT change to 0805/1206, Paid
arthur - 4 sets, 2 TH & 2 SMT, Paid
cowneko - 1 set SMT 0805/1206, Paid

---- List for GB #3 - Still Open ----
*nania - 1 set SMT, Invoice sent
Pierre QuiRoule, 1 set TH, Paid
jugi63, 1 set TH, Paid
bk856er, 1 set TH, Paid
ft0601, qnty 2 complete sets TH, Paid
Click to expand...
 
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