25W Single Ended Hammond 193V Choke Loaded 2SK180 L'Amp

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Ben Mah

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It's getting close. This may be it.

And it's mirror imaged left and right channels, all on one board. :geek:
 

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  • Choke Loaded Tokin SIT Follower-PCB top3.png
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  • Choke Loaded Tokin SIT Follower-PCB3.png
    Choke Loaded Tokin SIT Follower-PCB3.png
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Ben Mah

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I am re-doing my existing monoblocks so I am re-using the existing power supply and just changing the polarity.

I just looked at the Mouser website and they have 50V 15mF and 22mF available in two pin, 35mm diameter and 10mm pin spacing.

The five pin capacitors are more common for 80V, and I already have a PS board for that. But no, I have not designed a PS board for 35mm diameter, two pin capacitors. Is there demand?
 
Monk55

Monk55

ResisterClone
Joined 2011
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I made a run of PS boards for the singing bush done by R. Thatcher but there 5 pin jobs & those 63v are twice the $$ than those 50V 2 pin caps at mouser. Your PS design in this thread uses 50V.....just wondering (trying to keep overall size down) if those are acceptable for your amp in this thread. Demand is based on available caps I suppose....
 
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Ben Mah

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The V- allows the drain of the SIT to be at Ground, which makes the amplifier quieter, not that my V+ supply amps are noisy. I don't hear any noise from my 103dB speakers, but V- is supposed to be better, so why not? Its diy. :)

The PS board in my monoblocks were from ebay (cheap), which I modified to add the choke.

I suppose I could do up a simple four in a row cap board for two pin capacitors. :)
 
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Ben Mah

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Here is the original V+ power supply revised to output V-,

and even a PCB:
 

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  • V- Power Supply Schematic-Choke Loaded Tokin SIT Follower.png
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  • V- PS Board top-Tokin SIT Follower.png
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  • V- PS Board Bottom- Tokin SIT Follower.png
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  • V- PS Board 3D - Tokin SIT Follower 1.png
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  • V- PS Board 3D - Tokin SIT Follower 2.png
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Ben Mah

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I was happy with the mid-board stand-offs interfering with the choke and jumper connections so I made a revision. It should be good to go now.

I will not be getting boards done for myself since I do not need them, but if you are willing to take the chance, I will send Gerbers to you, and to anyone else that wants them.
 

Attachments

  • V- PS Board top-Tokin SIT Follower2.png
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  • V- PS Board Bottom- Tokin SIT Follower2.png
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  • V- PS Board 3D - Tokin SIT Follower 5.png
    V- PS Board 3D - Tokin SIT Follower 5.png
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