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Old 20th December 2012, 02:45 AM   #3361
DougL is offline DougL  United States
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Antoinel,

I think you are on to something with the Bipolar / Darlington.


Doug
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Old 20th December 2012, 01:53 PM   #3362
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Antoinel,

I think you are on to something with the Bipolar / Darlington.


Doug
I have been a diyAudio member for about 1 year; mostly interested in Pass Labs threads. I find it amusing that the words bjt and Class AB appear rarely in them; as if they are forbidden. DIYers are exclusively interested in using and speaking of "FET" devices in strictly Class A designs. The selection of acceptable FETs is nowhere as extensive as for bjts. Unfortunately this limits the DIYer's "degrees of freedom" to experiment and diy. Maybe in your design, a Darlington is truly a better cascoder than a MOSFET. I find it interesting that F6 is based on a Classic design which used bjts and operated Class AB.
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Old 20th December 2012, 03:59 PM   #3363
DougL is offline DougL  United States
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The concept drawing was a cut / paste job with the Zen 9 Cascode added to the F6 replacing the JFET outputs. And I learned something from it. If I build it, I will try it both ways.

If you want to play with BJT and Class AB, the larger Solid State Forum is ideal.
Nelson's interests are in class A and FET, so that is where this board is focused.
The more focused scope makes for a more collaborative experience.


Doug
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Old 20th December 2012, 04:25 PM   #3364
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Originally Posted by DougL View Post
The concept drawing was a cut / paste job with the Zen 9 Cascode added to the F6 replacing the JFET outputs. And I learned something from it. If I build it, I will try it both ways.

If you want to play with BJT and Class AB, the larger Solid State Forum is ideal.
Nelson's interests are in class A and FET, so that is where this board is focused.
The more focused scope makes for a more collaborative experience.


Doug
Thank you for your well put insights and direction. Other DIYers [I hope] and I look forward to your concept amp.

Best regards.
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Old 28th December 2012, 09:08 PM   #3365
Zen Mod is offline Zen Mod  Serbia
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what's up , Dodos ?


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Old 28th December 2012, 09:13 PM   #3366
Rush is offline Rush  United States
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what's up , Dodos ?


On vacation with the in-laws.
Oh, maybe this wasn't directed just at me?

Rush
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Old 28th December 2012, 09:16 PM   #3367
Zen Mod is offline Zen Mod  Serbia
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she is who must be obeyed

so - in-laws are closest kin

enjoy ........ you're excluded from Dodos

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Old 29th December 2012, 12:10 AM   #3368
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visiting the grandkids in Seattle

When Tea Bags boards arrive I will compare Jensen's and Oneticcs. Maybe this year somebody will release some SITs - think that will be the next step !!!

Also on the bench top is a AlephJ Jango. Boards are stuffed - waiting for PSU parts

Happy holidays to all you great guys here on the DIY forums

Best

Bob

Last edited by flocchini; 29th December 2012 at 12:12 AM. Reason: wording
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Old 29th December 2012, 12:18 AM   #3369
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visiting the grandkids in Seattle

When Tea Bags boards arrive I will compare Jensen's and Oneticcs. Maybe this year somebody will release some SITs - think that will be the next step !!!

Also on the bench top is a AlephJ Jango. Boards are stuffed - waiting for PSU parts

Happy holidays to all you great guys here on the DIY forums

Best

Bob
Started mine today. Also got some Sit parts for complimentary F6, kudos to Rush
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Old 29th December 2012, 12:21 AM   #3370
6L6 is offline 6L6  United States
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Also on the bench top is a AlephJ Jango. Boards are stuffed - waiting for PSU parts
Really? That's awesome! I have all the pieces, except for a couple small resistors. I need to get my chassis to a decent machinist for a bit of modification, and then it goes to the top of the list.

What PCB are you using? And do you have any spare R100's ?
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