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Old 11th April 2009, 06:20 PM   #51
1MOR is offline 1MOR  United States
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Peter, I sent PP for two F5 amp boards this AM. Thanks!
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Old 16th April 2009, 06:37 AM   #52
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Hello Peter,
Time for another buy! Think I'll do some balanced F5's.

I've just made a PayPal transfer for 4x F5 boards (8 channels).

Any problems, let me know.

Thanks again,

alex
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Old 16th April 2009, 04:59 PM   #53
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Quote:
Originally posted by alphalove
Hello Peter,
Time for another buy! Think I'll do some balanced F5's.

I've just made a PayPal transfer for 4x F5 boards (8 channels).

Any problems, let me know.

Thanks again,

alex

Great, the boards will shipt today. Thanks.
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Old 17th April 2009, 12:24 AM   #54
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Peter -

Do you have a BOM or parts recommendations for the Power Supply board shown in Posts 13 and 35 above??? It doesn't really look like the PS on the Pass website.

Sorry if this is a dumb noobie question; but, that's what I am.

Regards,

Thanks,
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Old 17th April 2009, 02:29 AM   #55
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The actual PS schematic for amp aplication as in attachment. To be honest, I never work with BOM, as it usually creates problems

When in doubt, follow the recommendations in F5 article. Digikey.com and mouser.com are good sources for parts in this case.
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File Type: jpg ps f5.jpg (46.7 KB, 1823 views)
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Old 17th April 2009, 04:32 AM   #56
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Peter -

The PS I'm referring to (in Post 13 - and attached) shows film caps, small electrolytic and some kind of regulator. Do you have a schematic for that one?? Or, can you tell me where to find one???

Thanks,
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Old 17th April 2009, 05:37 AM   #57
lgreen is offline lgreen  United States
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Default looks like a regulated PS

Looks like a regulated power supply.

Look at the LM317 data sheet or in this case the LT 1086 data sheet, page 14, top right hand side.

Neat little circuit, use them a lot; but I like to use the protection diodes you will see on the top of page 10 of the 317 data sheet. Not sure about using huge output caps either.


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Old 17th April 2009, 06:38 AM   #58
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Any 3-pin regulator will work with those boards and you just need to follow the appropriate datasheet applications.
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Old 17th April 2009, 08:38 AM   #59
schro20 is offline schro20  United States
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Default Re: looks like a regulated PS

Quote:
Originally posted by lgreen
Looks like a regulated power supply.

Look at the LM317 data sheet or in this case the LT 1086 data sheet
But these only do as much as 1.5Amps. Nowhere near enough for an F5. What am I missing?

peter
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Old 17th April 2009, 04:05 PM   #60
lgreen is offline lgreen  United States
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Default ah

ah...yes. The biggest ones I have seen are the LM138 and LM338 which will give you 5 amps max.

I do not believe that this board is intended to power the F5. You rarely see these used in power amps for the reasons you have noticed- lack of current capability... maybe only in a gainclone or something like that. There are other boards for the F5 power supply I believe.
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