with DHT rectifiers, is the "+" side of the power supply... - diyAudio
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Old 18th November 2006, 01:35 PM   #1
jarthel is offline jarthel  Australia
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Default with DHT rectifiers, is the "+" side of the power supply...

is best connected to the CT of the 5V secondary?

what disadvantage if I use one of the pin heaters as "+"?

thanks for the help
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Old 18th November 2006, 04:52 PM   #2
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If your 5.0Vac secondary has a center tap, then use it. Otherwise, a great many power xfmrs don't have one.

Otherwise, I don't think it makes much difference. Then, again, may be it does. I prefer solid state power supplies anyway.
There are no foxes in atheistholes
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Old 18th November 2006, 05:56 PM   #3
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Like Miles said, use the center tap if you have one for a directly heated rectifier like a 5Y3 etc. But not having a C-T, I'd suggest using pin 8 as the B+ pick off as this provides a direct connection to the cathode of an indirectly heated substitute like a 6087 or even a 5AR4.

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Old 18th November 2006, 10:43 PM   #4
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I prefer solid state power supplies anyway.
Miles, what do you think about hybrid bridge rectification, using SS with TV damper diode tubes? The voltage loss and sag are much less than with 'conventional' rectifier tubes but you get slow start and, I understand, suppression of hash from the SS half of the bridge.
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