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Old 27th August 2008, 11:33 AM   #11
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Hi Robert,

Recently i build a Darling amp with 1626 and one half 5965 for each side myself. I saw that you are planning to build a similair amp. For the powertranny you will be using a 240AC single supply and getting a to high DC voltage at the end. Here 's my advice use a full wave solid state rectifier and after that a 6X5 tube rectifier with the two anodes connected together for a voltage drop. After that you use a small condensator to tune the voltage starting for example 1uF. If you use a higher value the voltage gets higher. After that a choke for example from 4 to 10H or so and after that you can use a higher value condensator for example 100 to 200uF. So after the tube rectifier it will be a CLC filter and if the voltage is still a little to high you can use a small powerresistor for finetuning. Your amp will pull about 70 to 80mA from the powersupply so you can use a powerresistor as a load for testing. I hope this helps you a bit in building your Darling amp.

Best Regards,

Johan
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Old 27th August 2008, 12:22 PM   #12
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Default Thanks to both of you, yes that helps a lot!

I don't imagine that the circuit would feel much difference between 269 and 265 Volts.

I am using the ckassic Darling circuit,
http://www.geocities.com/TimesSquare/1965/darling.gif

Except I want to use a resistor and cap on each cathode instead of sharing them.
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Old 27th August 2008, 12:56 PM   #13
Stixx is offline Stixx  Germany
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Robert,

you are welcome...
Interestingly both audiotube and I suggested pretty much the same thing!
I still recommend getting PSUD2 and playing around with it... it helps to understand a few things
so much better, like how your output voltage varies with different loads and such.
My estimate of 56mA could be off, but even with a current draw of 70mA you could adjust the example
psu to supply that.

So go for it!
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Old 27th August 2008, 02:34 PM   #14
Stixx is offline Stixx  Germany
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attachment reposted (edited)
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File Type: jpg darling_1.jpg (92.0 KB, 129 views)
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Old 27th August 2008, 04:12 PM   #15
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Default Thanks! I'll take a look tonight

If I can get a computer up with PSD on it, I'll s ee what the values look like.

Thanks,

Robert
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