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Old 1st August 2006, 08:50 AM   #1111
Nixie is offline Nixie  Canada
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I've very large mica sheets of the same thickness as used in the usual insulators.

My question was more regarding say capacitance between the now-connected to drains bus bar and the heatsink, or the inductance of the long bus bar, etc.
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Old 1st August 2006, 10:03 AM   #1112
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The larger plate area increases the capacitance.
Might lose high frequencies. . . all. . . ?
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Old 1st September 2006, 11:41 PM   #1113
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Default PCB

I am interested in building the Aleph x , low power version and would like to know where I can get circuit boards.



j
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Old 2nd September 2006, 05:01 AM   #1114
Nixie is offline Nixie  Canada
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I've some spares, but see if you can find another source first, as I'm not quite certain I won't need them.
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Old 6th September 2006, 09:37 PM   #1115
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Default Getting started...transformers and boards

I have two 1000VA 35v secondary Plitron transformers at home that I bought about five years ago. I took them out recently and decided that I would like to build a power amplifier with them. I searched the forums and have done quite a bit of reading over the last four weeks on the SKA, Aleph-X, and various ChipAmps. I haven't found anyone using the transformers that I have with the Aleph X but would like some guidance as to how appropriate they are for the job as well as a possible source for boards to ease construction. if they are not going to work, perhaps a suggestion as to what project to build as it seems a waste to not use my big beautiful heavy chunks of copper for something.

Thanks!
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Old 6th September 2006, 09:45 PM   #1116
Netlist is offline Netlist  Belgium
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I can't comment on other amps but I believe 35V is a bit high for AlephX.

/Hugo
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Old 6th September 2006, 09:54 PM   #1117
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I too think that the voltage is too high for the Aleph-X. However, the transformers would make a great basis for a pair of Aleph 2's.

Graeme
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Old 8th September 2006, 12:08 AM   #1118
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Default resistors

Hello , Pardon me for this rudementary question. I am in the process of digesting Grey Rollins original 15v Aleph x schematic and was wondering about some of the resistor values... 392 ohm,221 ohm, 68.1k ohm. How do you obtain these uncomon values?



J
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Old 8th September 2006, 12:16 AM   #1119
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Default Re: resistors

Quote:
Originally posted by tenderland
Hello , Pardon me for this rudementary question. I am in the process of digesting Grey Rollins original 15v Aleph x schematic and was wondering about some of the resistor values... 392 ohm,221 ohm, 68.1k ohm. How do you obtain these uncomon values?



J

uncommon?
nope- common values in 1% metal film - E48 (is it ?) nomenclature
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Old 8th September 2006, 12:47 AM   #1120
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Default oh boy

sory i think I didnt check around enough, I just looked at MCM , seems like Mouser has a plethora of said values.



Thanks

J
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