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Old 23rd August 2012, 08:46 AM   #1271
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Hi Sharkey!
The DC resistance will be the same with or without load. The inductance might change with different loads. Some LCR meters measure resistance with an AC signal and will not give the correct DC resistance.
Thorsten
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Old 2nd September 2012, 10:16 PM   #1272
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One of the downsides of these LONG threads here on DIYaudio is that the information is spread out across many pages.

With that in mind, I apologize if my question has already been answered.

I am planning to build one of these babies, and originally wanted to use tube rectification. I've now decided to go with solid state for practical reasons.

I have two of these power trannies:
Transformatoren - Voedingstrafo Buizenapparatuur - EOO - ElectronicaOnderdelenOnline

Nice quality stuff for not a lot of money really.

But the downside is that they don't have a 5v winding, so I need a separate transformer for the CCS'

Here's the actual question: Given that the original PSU design uses a voltage doubler, can I use a tranny other than 5v? I'm thinking of using a 9v one, and I have a 15v one laying around, so if I could use that even better!
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Old 3rd September 2012, 05:52 AM   #1273
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There is no problem using a second tranny.
In my build, I used a 12V one and a LM337 to regulate it and bring the voltage down.
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Old 3rd September 2012, 08:32 AM   #1274
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Cool, thought so.

Is there a range of voltages the CCS blocks will work with? Can I use 15V?
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Old 3rd September 2012, 10:41 AM   #1275
vgeorge is offline vgeorge  Greece
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It will work, but you may need to adjust the Rset on the CCS.
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Old 6th September 2012, 05:09 AM   #1276
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Hello.
My amplifire
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Old 6th September 2012, 08:23 AM   #1277
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Pout=2х8W
Rout=32 Ohm
Raa=8kOm\8Ohm
F=20-50 000 Hz "0"dB
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Old 25th September 2012, 06:33 PM   #1278
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Default Baby Huey power supply advice wanted.

Hello all. I have not built a power amp before so would appreciate a bit of advice re Baby Huey power supply design. I have modelled the attached design with PSUD2 but want to check that it is good before going ahead with component purchase. My transformer has 240v taps as well as 290v which may be more appropriate for solid state rectification. Any advice greatly appreciated as I am not at all confident re calculations or ideal PS design..
Thanks. Ian M.
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File Type: jpg PSU.jpg (285.9 KB, 522 views)

Last edited by sharkey22; 25th September 2012 at 07:02 PM. Reason: more info.
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Old 6th October 2012, 08:36 PM   #1279
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Hi all,

I spent a fair bit of time reading through this thread and have decided to construct the 6V6 version but maybe use 6F6's.

Out of interest, has anyone had any experience with 6F6's in this amp? Is there anything I should be aware of before I go down a 6F6 Baby Huey path?

Thanks!
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Old 7th October 2012, 10:05 PM   #1280
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6F6 should be fine. If you haven't got output trannies yet I would go for 10K Raa rather than 8K but that is "fiddling at the edges". If using Hammonds then that means 1609 rather than 1608.
Cheers,
Ian
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