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Old 2nd January 2017, 01:53 PM   #91
6L6 is offline 6L6  United States
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F-5 boards
Didn't realize they were sold out. I'll get the ball rolling on another batch.
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Old 2nd January 2017, 01:56 PM   #92
McQuaide is offline McQuaide  United States
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Originally Posted by 6L6 View Post
Didn't realize they were sold out. I'll get the ball rolling on another batch.
Thanks!
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Old 29th November 2017, 04:41 PM   #93
arjanv is offline arjanv
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stupid question, but which Toroidal Transformer is needed?
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Old 29th November 2017, 04:49 PM   #94
6L6 is offline 6L6  United States
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F-5 boards
18+18v or 20+20v, 300VA or bigger
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Old 29th November 2017, 06:59 PM   #95
arjanv is offline arjanv
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Originally Posted by 6L6 View Post
18+18v or 20+20v, 300VA or bigger
like this one?
2x 18V toroidal transformer 500VA

you mentioned 18 or 20v, where is that based or depends on?
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Old 29th November 2017, 07:08 PM   #96
labjr is offline labjr  United States
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Originally Posted by arjanv View Post
like this one?
2x 18V toroidal transformer 500VA

you mentioned 18 or 20v, where is that based or depends on?
That'll do. Either 18v or 20v will do fine. If your line voltage was on the low side you may go with 20v. And some transformers are rated slightly different than the Plitrons. But not a big deal.
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Old 6th January 2018, 01:10 PM   #97
Rixsta is offline Rixsta  United Kingdom
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F-5 boards
I'm hoping the JFETs will be back soon as I want to order full transistor set and boards in one go.
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Old 6th January 2018, 01:12 PM   #98
6L6 is offline 6L6  United States
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F-5 boards
You've built a million F5s at this point, you should really build an Aleph J...

Matched Jfet are still an issue, we are actively working on it. They will return, we promise. Hopefully soon.
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Old 6th January 2018, 01:40 PM   #99
Rixsta is offline Rixsta  United Kingdom
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Thanks good to know
Hehe.. I've built an F5 for a friend and a F5 turbo for another friend that sounded amazing but had issues.. So now am wanting to build a F5T for myself using the new revision diyaudio boards.
I'll have a look at aleph J
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Old 6th January 2018, 01:44 PM   #100
6L6 is offline 6L6  United States
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F-5 boards
The F5T boards are not much different, if at all. The F5 (standard, single output pair) are in their v3 revision. (Has the "P3" pot)

F-5 – diyAudio Store

There's a new parts kit for that PCB in the store, everything for the amp channels except the Jfets - F5v3 Kit – diyAudio Store


As for the Aleph J, that needs the differential (j74/J74) matched pair Jfets, those are in stock - J74/J74 Stereo Differential Kit – diyAudio Store

The matched transistors can be found here - Aleph J Transistor Kit – diyAudio Store

And PCB - Aleph J – diyAudio Store

Build guide - Aleph J illustrated build guide

As for sonic differences, Zen mod summed it up the best years ago - With the F5 you see the cockroach crawling around the violinist's feet, with the Aleph J the cockroach turns and smiles at you.

Last edited by 6L6; 6th January 2018 at 01:51 PM.
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