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Old 11th February 2013, 03:26 PM   #411
iko is offline iko  Canada
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Aaaand, I'd like to remind everyone that this little project linked below is absolutely excellent if you want extremely low distortion, and in general pristine numbers.

Audio Buffer in english
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Old 11th February 2013, 03:28 PM   #412
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Iko I have Rod's Coleman heaters for 41PL, sorry my ignorance if I use Rod's heaters is necessary R2 & V4?
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Old 11th February 2013, 03:37 PM   #413
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Look at the 26 preamp, you'll connect his regulator exactly the same.
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Old 11th February 2013, 03:40 PM   #414
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Old 11th February 2013, 05:51 PM   #415
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Iko for 307A I want to use SSHV2 that draws itself 20V 20mA, I have calculated the tx 380VAC 0.1A 38VA = 50W, it's enough or I have to increase?

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Old 11th February 2013, 06:15 PM   #416
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Do you plan to use one regulator per channel? And only for the output stage or for both stages?
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Old 11th February 2013, 06:19 PM   #417
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For 26 I only use one SSHV2, this project is more complex, I have to order custom transformer with two secondaries so I need the information to order it, separate power tx for heaters so I need the exact value in V & A for 307A?

Sorry in advance asking a lot of work.
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Old 11th February 2013, 06:29 PM   #418
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I don't know if the SSHV2 can do 420V or, depending on your output transformer, even more. If go with fixed bias for the 307a you might be able to get away with SSHV2 providing 380V.
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Old 11th February 2013, 06:49 PM   #419
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Ooops forget SSHV2 only arrives till 380Vout, I will use SSHV2 for 4P1L so obbligated for fixed bias. Tx with two secondaries one for 307A 300-310VAC and the other one for 4P1L 240VAC? wich power each secondary?

Last edited by merlin el mago; 11th February 2013 at 06:55 PM.
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Old 11th February 2013, 06:58 PM   #420
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Using a shunt regulator at such high voltage and current is quite a tour de force. I've designed and built a few. A lot of care goes into what devices to use and how they dissipate the heat, at steady state as well as ramping up to steady state. It's not for the faint of heart. Just saying.
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