Simplistic Mosfet HV Shunt Regs - Page 52 - diyAudio
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Old 9th September 2009, 10:54 AM   #511
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by Stixx View Post
I should be readable when you fully enlarge it (first zoom it and than extend in lower left corner).
I don't understand this instruction.

I can expand with the + option.
Then irf9240 and irf240 are just legible. The small text could do with being at least one size larger to help legibility.
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Old 9th September 2009, 11:59 AM   #512
Ryssen is offline Ryssen  Sweden
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I found out how.If you hold the arrow on the picture (when you have enlarged it),an other cross comes up,press it and the picture gets even larger.But the picture is qiute dissy anyway.
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Old 9th September 2009, 12:33 PM   #513
AndrewT is offline AndrewT  Scotland
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Originally Posted by Ryssen View Post
I found out how.If you hold the arrow on the picture (when you have enlarged it),an other cross comes up,press it and the picture gets even larger.But the picture is quite dissy anyway.
I only see a - option after I have used the + option.

But in Firefox View/Zoom I can blow it up. The text is still too small for clear reading.
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Old 9th September 2009, 12:55 PM   #514
Ryssen is offline Ryssen  Sweden
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Quote:
But in Firefox View/Zoom
Ohh,I thought you used Firefox,I do..
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Old 9th September 2009, 12:59 PM   #515
AndrewT is offline AndrewT  Scotland
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I do use Firefox.
I get the + option on the Thumbnail.
Then I get the - option when I hover over the enlarged version.
Left and right clicks do not bring up a further + option.
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Old 9th September 2009, 01:38 PM   #516
Stixx is offline Stixx  Germany
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Default schematic

When you guys are interested I can send the schematic via email...
don't want to abuse Salas' thread for headphone amplifiers

Just drop me a PM with your email adress...
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Old 24th September 2009, 09:12 PM   #517
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Hi Salas,

I would like to build the regulator for my preamp. The preamp uses 2 12AU7 , 2 PCC88 cathode follower and draws about 25mA per channel @ 260VDC. I' m planning to use one regulator per channel. Can you please help me calculate component values?
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Old 24th September 2009, 09:29 PM   #518
Salas is offline Salas  Greece
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Sure, here it is. I calculated it for more common leds between 1.9V to 2.1V Vf also. Make sure they fall in that voltage bracket, lest is going to go hotter for no reason. Two of them are going to ask for 120mA constant current total, bear that in mind with your power transformer(s) choice. One is enough for 2 channels also if you want to get familiar first. Can't set any lower in mA for preserving all the performance from the HV shunts. Good luck and let us know with some pictures and a report when ready, watch it, it does not forgive misshandling.
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Old 24th September 2009, 09:45 PM   #519
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Thank you Salas for your prompt reply,

I will built it and post the results.
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Old 24th September 2009, 10:12 PM   #520
disco is offline disco  Netherlands
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Quote:
Originally Posted by Salas View Post
... watch it, it does not forgive misshandling.
Bwah, I've misused them for some time now and never had to replace a semi

MPSA94 arrived today (at last). Will fire up the irons and build me a nice 2A3 this weekend.
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