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Wayne's BA 2018 linestage
Wayne's BA 2018 linestage
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Old 18th August 2019, 10:52 AM   #791
El Reino is offline El Reino  Finland
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Wayne's BA 2018 linestage
MEPER, Look this.
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Last edited by El Reino; 18th August 2019 at 11:01 AM.
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Old 18th August 2019, 11:07 AM   #792
MEPER is offline MEPER  Denmark
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Perfect!
Thank you!
I printed it......and I am not out of ink!
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Old 18th August 2019, 01:16 PM   #793
6L6 is offline 6L6  United States
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Wayne's BA 2018 linestage
Quote:
Originally Posted by MEPER View Post
Is there a link to schematic with big output transistors?
There are some small changes other than just transistors?
R11 R12 use 1/2W resistors.

C1 change to 5pF

R23 C4 leave open

Look at the last schematic in the series of slides.
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Old 18th August 2019, 09:15 PM   #794
MEPER is offline MEPER  Denmark
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Yes, thank you I observed that also that R11/R12 emitter resistors can be lowered to 15 ohm for higher bias? …..If I go for the larger transistors then why not let them "work hard"? …..if possible without additional heatsink...….or I could get some of the small clip-on heatsinks. I could also just stay with 27 ohm if higher bias is of no benefit such as lower distortion.
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Old 19th August 2019, 01:31 PM   #795
chede is offline chede  Germany
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Wayne's BA 2018 linestage
Hi Meper,

no heatsinks needed with rails of +/- 18V and 15R resistors for SA1220 / SC2690 or Toshiba TTA004B / TTC004B

Regards, Claas
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Old 19th August 2019, 07:22 PM   #796
MEPER is offline MEPER  Denmark
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Ok....I may use a little higher rails. I use -+26V on BA-3 pre and there heatsinks are necessary. I should probably do my calculations when I am that far......until now I am in the preparation/thinking phase :-)
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Old 20th August 2019, 10:31 PM   #797
Gooch is offline Gooch  United States
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Quote:
Originally Posted by 6L6 View Post
There are currently none available.

Waiting for the stereo layout to be tested, then the PCB will be in the store.
Will they be in the Pass Diy store or the here on DIY audio?

Thanks
Dave
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Old 20th August 2019, 11:35 PM   #798
6L6 is offline 6L6  United States
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Wayne's BA 2018 linestage
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