He said he had problems with D1 in his layout. Take it out, and see if you have VGS voltage on 9610. Else change it after you deleted D1. *Shunt regs run cooler WITH load.
Check 2SK170 then, take it out and do idss test. Don't know more about the specific board, maybe you can ask in their thread for more.
SSHV to be safe and protected 840, MJE, K170, so before you installed the CCS and Trimmer. When adjusting the output voltage stability, the rest continue to mount (shunt): 840, Mje350, k170.
It is the simplest way.
Problem solved!
I can't imagine that with 1K of trimmer, the range of regulation was from 35 to 300 volts! And obviously, with 50Volts v-out the rest of tension was dissipated by the mosfets, reaching high temperature. Simply adjusting voltage to the 250 volts needed the regulator works very fine.
I've mounted on my aikido and must admit it is quite better than the tube regulator I had. Noise near to zero, hissing too. More impact and dynamic. Voices are simply awesome, stage bigger and deeper, in few words, higly raccomanded!
To reduce the sizing of heatsink the drop voltage in/out must be the minimum possible.
Thanks salas for the great project! 🙂
I can't imagine that with 1K of trimmer, the range of regulation was from 35 to 300 volts! And obviously, with 50Volts v-out the rest of tension was dissipated by the mosfets, reaching high temperature. Simply adjusting voltage to the 250 volts needed the regulator works very fine.
I've mounted on my aikido and must admit it is quite better than the tube regulator I had. Noise near to zero, hissing too. More impact and dynamic. Voices are simply awesome, stage bigger and deeper, in few words, higly raccomanded!
To reduce the sizing of heatsink the drop voltage in/out must be the minimum possible.
Thanks salas for the great project! 🙂
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Yet, a minimum in/out voltage difference should be maintained in order for the regulator to work well.
15-20V minimum in-out with 9610. Make sure that the Aikido leaves 20-25mA spare running in the reg as well. Congratulations for good final result.
P.S. What circuit was the tube reg used before?
P.S. What circuit was the tube reg used before?
Hi Salas!
I know it, but because there are many people struggling to build SSHV, so I need to show them how simple, someone may not find it anywhere, so I've put in here! Thank you very much.
I always consider you a master of design resources and I respect it, and also want people to know the true value of SSHV.
The best thing for you!
Quanghao
I know it, but because there are many people struggling to build SSHV, so I need to show them how simple, someone may not find it anywhere, so I've put in here! Thank you very much.
I always consider you a master of design resources and I respect it, and also want people to know the true value of SSHV.
The best thing for you!
Quanghao
People know more than we think. You can't beat the communal mind. And I am no master of design, my knowledge in electronics is amateurish lazy level. I just try out simple concepts that hopefully have good fidelity to simplicity ratio and can be easily repeated.
A cascoded tube control element with VR tube voltage reference and EL84 pass element. Italian circuit non the less. Should have had a good tone. But those schemes although fine, can not have the noise and Zo performance and flatness that we achieve here with bunch of few parts, much more economically so, without heaters, tube wear, etc.
These are the major differences between series and shunt regulators.
I believe there is no doubt that shunt regulators are best.
I believe there is no doubt that shunt regulators are best.