Streamer build
TBH, I hadn't really thought about it until now.
After making the MoFo, it made sense to move on to the pre amp.
I mean; my AKSA-Lender still isn't done, needing a case and the proper voltage.
In any case, it made sense to try for the next stage.
I'll start that investigation when the preamp has a proper enclosure.
Kind regards,
drew
TBH, I hadn't really thought about it until now.
After making the MoFo, it made sense to move on to the pre amp.
I mean; my AKSA-Lender still isn't done, needing a case and the proper voltage.
In any case, it made sense to try for the next stage.
I'll start that investigation when the preamp has a proper enclosure.
Kind regards,
drew
Bravo Drew!!
Wasn’t it worth the wait?
Enjoy your ALP/MoFo combo!
Yes great sound. Very satisfying build for.sure. Can't wait to hear how my SONY "monkey coffins" sound with it, compared to my Sansui 5000x.
I've been considering the NuTube as an alternative, because I've never (knowingly) heard a tube amp b4.
Kind regards,
Drew
I have power supply questions. The end goal for The AKSA lender is to drive an F4. But in the meantime, It will be driving an F5 Turbo biased to 80 class A watts/channel.
The boards I have are marked T141 and T142, and I recall reading *somewhere* about using Talema transormers. I even recall looking for them a couple years back, but somehow, I've gotten lost.....
And, the BOM does not identify either T141 or T142.
could someone point me in the right direction please?
The boards I have are marked T141 and T142, and I recall reading *somewhere* about using Talema transormers. I even recall looking for them a couple years back, but somehow, I've gotten lost.....
And, the BOM does not identify either T141 or T142.
could someone point me in the right direction please?
An easy way to find something specific, is to put Google search to use. If you enter "AKSA's Lender Preamp with 40Vpp Output " or talema or site:diyaudio.com into Google, you'll probably find what you're after.
Try it here
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Try it here
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The AKSA Lender Preamp doesn’t have provisions for onboard transformers.
The Yarra preamp uses a pair of Talema Trafos, 15va or 25va, 60mm x 60mm size. Example: Blocked
Lost
I am at a loss. I have built the preamp but I am getting wicked amounts of dc at turn on, something like 12v at the output. This then declines into the millivolt range over 30 seconds or so. If left on long enough it warms up and the output dc drops to a steady 1mv or less.
Where do I begin to look for the cause of this?
I am at a loss. I have built the preamp but I am getting wicked amounts of dc at turn on, something like 12v at the output. This then declines into the millivolt range over 30 seconds or so. If left on long enough it warms up and the output dc drops to a steady 1mv or less.
Where do I begin to look for the cause of this?
thanks for that. I've started to read the 133 pages. There's are plenty of info dispersed within those pages. I didn't think those buck converters were quiet enough for us in the golden ear crowd, but happy to be proved wrong.
Well it finally happened, after 50 years of building electronic stuff I put a electrolytic capacitor in backwards, didn’t hurt anything as I slowly ramped power up watching an amp meter. Not to look a gift horse in the mouth ( not sure where that saying came from) I would have caught it if the polarity marking had not been covered by the capacitor ( hint hint). Also my pre amp boards powered up with no smoke however do not work. I verified no solder bridges or cold joints and I always verify resistors to 5 digits ( critical positions buy extra and match). I did measure and match the bc560c for hfe but did not verify rest of semiconductors. Since both boards act the same I suspect I may have sourced some fakes.
Bill
Bill
Nelson Pass mentioned he felt full range speakers benefited being driven by a current buffer as opposed to standard amp. Since I happen to have a pair of stereo F4 amps and a pair of Frugal horns I thought I would see for myself. Once you have listened to a full range speaker there is a purity to them.