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AKSA's Lender Preamp with 40Vpp Ouput GB
AKSA's Lender Preamp with 40Vpp Ouput GB
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Old 13th February 2018, 01:01 PM   #341
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
I am starting to ship now. There are still a few sets left if you are interested.

It sounds great and measures very well. Like a muscular Aksa Lender Preamp that can drive 8ohm loads.

Click the image to open in full size.
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Old 13th February 2018, 05:34 PM   #342
MShipmanPE is offline MShipmanPE  United States
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Old 15th February 2018, 10:28 PM   #343
MShipmanPE is offline MShipmanPE  United States
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X

Just a reminder:

1 set TH AKSA’s Lender preamp boards
1 set AKSA Lender PMOS Hybird Aleph 20 watt boards
Ship together
Paid $25
Need invoice for remaining balance.

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Old 16th February 2018, 12:46 AM   #344
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Mshipman,
Ok just sent you invoice.
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Old 22nd February 2018, 03:00 PM   #345
Vunce is offline Vunce  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Hi X,

My current daughter boards have 12k resistors in R10 to use with my MoFo amp.
I am assembling another set of DB’s to use with a tube amp that has 20db of gain on its own. Can I use 3.3K or lower in R10 to significantly lower the gain?

Vunce
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Old 22nd February 2018, 03:13 PM   #346
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Hi Vunce,
Yes, changing R10 to 3.3k will give you 10.4dB gain, which is in general on the low side even when driving a 20dB amp. I would go a bit higher with 3k9 for 14dB gain on the Aksa Lender pre. Here is a trick: solder R10 sticking out the back side all on its own so you can easily swap it out.
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AKSA's Lender Preamp with 40Vpp Ouput GB-r10-backside-jpg
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Last edited by xrk971; 22nd February 2018 at 03:16 PM.
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Old 22nd February 2018, 03:16 PM   #347
Vunce is offline Vunce  United States
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Thanks X Click the image to open in full size.
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Old 24th February 2018, 12:55 AM   #348
MShipmanPE is offline MShipmanPE  United States
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Have boards in hand.

Thanks X
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Old 24th February 2018, 06:29 PM   #349
Vunce is offline Vunce  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
While waiting for components to arrive for my ALPHA20 project, I assembled a set of daughter boards to lower the gain in my AKSA Lender preamp. The original set used 12K ohm resistors in R10 and worked great with my MoFo amplifier, but was too ‘hot’ for my 6L6 tube amp. I used 4.7K ohm for these daughter boards. The resistor change enables a much finer volume control.
I was able to position Q4 and Q5 so I could attach small heatsinks, they get pretty warm/hot.
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Old 24th February 2018, 06:37 PM   #350
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Nice work, Vunce. I did the same trick to get the heatsinks on opposite sides too. Those are nice coupling caps you have. Only the best here.
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