I may have something soon if anyone is interested, a shunt reg, parts arrives a couple of days ago, knocked up a basic circuit, at the moment it's working at 1.23A, was going to develop it over the next week but iv'e had my annual leave cancelled again
Shunt reg shoot out
Please jump in with criticisms observations or recommendations. The TL431 is missing a resistor from the top of the preset to +S.
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I put together a two channel mono rail supply designed for the F2 (from Kinku) and was planning on casing it seperately so that it can be tried with my ACAs.
I thought to treat it like an oversized laptop supply, as the 24V Meanwell supplies running the ACAs now. Just put IEC, tranny, bridge rectifiers and PCB with CRC and CL60 provisions in box with outputs to a properly rated 13A umbilical that can be plugged into either the ACA or F2 amp cases. Umbilical cables would be minimum length. Maybe 18 inches at most.
I’m wondering if I should also reconsider.
I thought to treat it like an oversized laptop supply, as the 24V Meanwell supplies running the ACAs now. Just put IEC, tranny, bridge rectifiers and PCB with CRC and CL60 provisions in box with outputs to a properly rated 13A umbilical that can be plugged into either the ACA or F2 amp cases. Umbilical cables would be minimum length. Maybe 18 inches at most.
I’m wondering if I should also reconsider.
Thank you for the encouragement ZM.
Apologies for the off topic.
It's all your fault ZM, you mentioned something about making my favourite Shunty smaller
Seriously, I've seen shunt type power supplies for preamps and all, didnt know you could scale one up for power amp duty! Let's hear it!
Russellc
I may have something soon if anyone is interested, a shunt reg, parts arrives a couple of days ago, knocked up a basic circuit, at the moment it's working at 1.23A, was going to develop it over the next week but iv'e had my annual leave cancelled again
Shunt reg shoot out
Please jump in with criticisms observations or recommendations. The TL431 is missing a resistor from the top of the preset to +S.
Please, this is putting my power supply on hold for right now, lets see what this is about!
Russellc
I may have something soon if anyone is interested, a shunt reg, parts arrives a couple of days ago, knocked up a basic circuit, at the moment it's working at 1.23A, was going to develop it over the next week but iv'e had my annual leave cancelled again
Shunt reg shoot out
Please jump in with criticisms observations or recommendations. The TL431 is missing a resistor from the top of the preset to +S.
I would suggest all here glance at the link provided by Ismee, very interesting power supply read. Let's see this scaled up to power amp size, winter is coming.
Russellc
Russellc
Don't wait for me, you can always add it later if something comes from it.
There's no reason I can think of that it can't be done, definitely need more FETS.
I personally would only regulate the driver stage, every time I tried regulating the output stage it strangled the sound, YMMV.
Average bias of Papa amp 1.2A, leave class A at x2 bias, plus a bit more for the circuit = 2.5A minimum (mono), I'll scale it up after I'm happy with it
@Russellc
finished yours?
i have built 2 versions of my diy audio rack, the idea to keep everything together. but now I'm bored to see so many items in front of me so decided to move out the rack and just put dac and cd player in the centre and monoblock amplifier on each side
with my 2 chassis amplifier and separate psu box, i have 2 options:
1. only need to extend DC cable length into 2.5m (room width is 5.8m) and put psu box in the centre below dac
2. disassemble psu box and put toroid + CLC on each amplifier chassis which become true monoblock build
- i have seen commercial amplifier with separate psu chassis but with 2.5m DC cable will be safe? (option 1)
- toroid and inductor on same chassis with circuit board might give negative impact, also it's a shame the nice teak wood chassis should be dissambled (option 2)
any opinion which one is better?
finished yours?
i have built 2 versions of my diy audio rack, the idea to keep everything together. but now I'm bored to see so many items in front of me so decided to move out the rack and just put dac and cd player in the centre and monoblock amplifier on each side
with my 2 chassis amplifier and separate psu box, i have 2 options:
1. only need to extend DC cable length into 2.5m (room width is 5.8m) and put psu box in the centre below dac
2. disassemble psu box and put toroid + CLC on each amplifier chassis which become true monoblock build
- i have seen commercial amplifier with separate psu chassis but with 2.5m DC cable will be safe? (option 1)
- toroid and inductor on same chassis with circuit board might give negative impact, also it's a shame the nice teak wood chassis should be dissambled (option 2)
any opinion which one is better?
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i did not think for this option but interestingBest option would be to build another of these beautiful teak wood chassis and place them each under their respective amplifier box ...
Of course, that is also the option that causes the most work ... [emoji14]
Regards, Claas
No, got side railed by Wayne's 2018 line stage, and Sissy Sit....however Sissy Sit getting close, need 5u chassis then will start in earnest with steel 4or 5U box (likely 5U, as more room and steel case without heatsinks is more inexpensive)for separate power supply. May cannabilize existing amps power supplies but hate to hack apart anything that is working....
Russellc
Russellc
with self lockwown and WFH i can get extra time to rework my FW clone. previous seperate psu box which make monoblock, now i put each toroid on each box with J2 and M2 board on each side. i can switch the supply easily with Powercon connector.
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