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Old 13th February 2017, 08:17 PM   #71
Duck-Twacy is offline Duck-Twacy  Netherlands
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Hello, I have a pair of F5 pcbs layout from CViller laying around (v1.0 dated 2008-12-14). Together with a pcb for the PS.
Now I wonder, are these still worthy of building, given the many new turbo versions? I would be satisfied with the 25 watts of the original F5, so that's no reason to go to a newer layout. But how about the sound, are the turbo version better sounding?

And of course, what about the build guides, are they of any use for the classic F5 (couldnt find a similar guide for the classic F5, except for the 1500+ pages F5 thread...)
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Old 13th February 2017, 08:29 PM   #72
6L6 is offline 6L6  United States
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Build the F5 with your PCB. The F5T just have more power, there isn't an appreciable difference in sound.

There is a F5 build guide, but it's using the Peter Daniel PCBs. Much of the information is still applicable, as the only real differences are the board layout - it's the same amplifier, after all.
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Old 13th February 2017, 08:39 PM   #73
Duck-Twacy is offline Duck-Twacy  Netherlands
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Thanks, I will search for it. Pity the F5 transistor kits are sold out in the diyaudio store. Are these hard to find in normal stores (Mouser and so on)?
Also I believe Tech-diy is no longer selling them.
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Old 13th February 2017, 08:41 PM   #74
6L6 is offline 6L6  United States
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A standard F5 does not need matched transistors, although matched Jfets do help keep everything else in line.

Matched Jfets will return to the store someday. The rest you can buy from Mouser.

F5 guide - An illustrated guide to building an F5
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Old 13th February 2017, 11:49 PM   #75
rif is offline rif  United States
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Quote:
Originally Posted by 6L6 View Post
A standard F5 does not need matched transistors, although matched Jfets do help keep everything else in line.

But the Aleph j and F5t require matched MOSFETs, right? Would you be interested in doing a quick "build guide" on matching MOSFETS? I've read the Pass articles on it a few times and still it doesn't quite click.
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Old 14th February 2017, 12:02 AM   #76
6L6 is offline 6L6  United States
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Go to this page, select 'device matching' from the side menu, scroll to Mosfet matching. I can't make a direct link due to the way the pages are formatted.

It's very easy - PSU, resistor and DMM.

The β22 stereo amplifier
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Old 14th February 2017, 01:25 AM   #77
rif is offline rif  United States
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Thank you! That is exactly what I needed. That setup is in the Pass article too, but the article goes on up a few levels in complexity, and lead me to believe i needed to too (kind of like when his amplifier articles show a simplified then a full circuit, you don't build the simplified one)
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Old 16th July 2017, 09:23 AM   #78
captJackSparrow is offline captJackSparrow  India
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For countless times I have been through your illustration threads and I never said thank you for this, it has helped me tremendously since I don't know much about electronics.


So thankyou.
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Old 16th July 2017, 12:13 PM   #79
6L6 is offline 6L6  United States
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Old 17th July 2017, 10:21 AM   #80
Variac is offline Variac  Costa Rica
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They ARE ultra awesome! And I'm sure have allowed many people who ordinarily couldn't have built amps successfully, succeed! A great contribution to our community!
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