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Old 5th November 2019, 01:27 AM   #11
PKI is offline PKI  United States
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Thank you so much Nelson, this looks amazing!

Will boards be available for those of us who canít make it to the event?
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Old 5th November 2019, 02:02 AM   #12
wg45 is offline wg45  United States
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Thank you, Papa! I appreciate your generosity to our community.

I’m looking forward to the build and paring the preamp with my two ACA’s.
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Old 5th November 2019, 05:25 AM   #13
PRR is offline PRR  United States
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Looks like 76k to me.

Have I slipped a cog? (Again?)

In solid-state work this does not matter. But there are some tube and passive sources which may strain mildly in 20k and be fine for >47k.

OTOH: why not R2 R3 = 1Meg? The JFET won't care. Rin now 500k. Then a 0.1uFd film-cap for C1 to reduce kneejerk reaction to an electrolytic (not that I care about an ample e-cap). I suppose price is a goal?
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Old 5th November 2019, 08:07 AM   #14
carsten.witt is offline carsten.witt  Germany
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@NP,

Thumbs up, nice project.
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Old 5th November 2019, 08:43 AM   #15
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by PRR View Post
Looks like 76k to me.

Have I slipped a cog? (Again?)

In solid-state work this does not matter. But there are some tube and passive sources which may strain mildly in 20k and be fine for >47k.

OTOH: why not R2 R3 = 1Meg? The JFET won't care. Rin now 500k. Then a 0.1uFd film-cap for C1 to reduce kneejerk reaction to an electrolytic (not that I care about an ample e-cap). I suppose price is a goal?


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Old 5th November 2019, 01:08 PM   #16
dBel84 is offline dBel84  United States
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To all who are going to BA, have enough fun for all of us not able to make it.
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Old 5th November 2019, 01:17 PM   #17
El Reino is offline El Reino  Finland
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Thank you Mr.Pass
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Old 5th November 2019, 01:40 PM   #18
indra1 is offline indra1  Indonesia
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Originally Posted by 2 picoDumbs View Post
... Please please please please please
Be very much alert on the "distributed in some fashion" part.
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Old 5th November 2019, 02:18 PM   #19
6L6 is offline 6L6  United States
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Photos of the not-quite-final BAF'19 Workshop PCB, but close enough that it's fine for illustration.
Attached Images
File Type: jpg IMG_2641.jpg (592.3 KB, 1148 views)
File Type: jpg IMG_2636.jpg (1,015.0 KB, 765 views)

Last edited by 6L6; 5th November 2019 at 02:21 PM.
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Old 5th November 2019, 02:31 PM   #20
MEPER is offline MEPER  Denmark
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Looks good. Think I will try it when available in the DiyStore.
Is a dedicated chassis also made for it?
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