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Wayne's BA 2018 linestage
Wayne's BA 2018 linestage
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Old 17th January 2019, 01:04 PM   #101
omsoc is offline omsoc  United Kingdom
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I realise from post 67 that all kits are spoken for but will the boards be available again?
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Old 17th January 2019, 04:03 PM   #102
6L6 is online now 6L6  United States
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Wayne's BA 2018 linestage
All kits currently spoken for.


There may be some spare PCB remaining, once everything is packed, if there are I will happily distribute them to interested people. Don't contact me about that yet, I'll send out a call at the appropriate time.
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Old 17th January 2019, 04:33 PM   #103
6L6 is online now 6L6  United States
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Wayne's BA 2018 linestage
omsoc-

I realize I didn't answer your question as well as I could; There will be a version of this circuit/PCB in the store in the future. There will almost assuredly not be another run of these little pink boards if for no other reason than there's no mounting holes on them...

This will be a project supported in the store and on the site, it's a great circuit and this is just the very beginning of what will come.
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Old 17th January 2019, 05:00 PM   #104
phomchick is offline phomchick  United States
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@6L6, did you try the board edge mounting kit in post #26? Are you including them in the kits? (Given the price of the kits, Iím guessing not).
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Old 17th January 2019, 10:37 PM   #105
6L6 is online now 6L6  United States
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Wayne's BA 2018 linestage
I haven’t actually mounted the PCB to a chassis with them, but yes, they fit.

They are not included in the parts kit.
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Old 19th January 2019, 07:21 PM   #106
6L6 is online now 6L6  United States
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Members listed in post #68, please check your Email.
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Old 19th January 2019, 09:30 PM   #107
gary s is offline gary s  Australia
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Email sent back to you, thanks Jim.

Cheers,
Gary..
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Old 20th January 2019, 07:23 PM   #108
adason is offline adason  United States
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Quote:
Originally Posted by 6L6 View Post
Members listed in post #68, please check your Email.
Hi 6L6, no email received yet...
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Old 22nd January 2019, 04:19 PM   #109
mimba is offline mimba
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Hello,


i have a problem with the preamp.


After soldering i checked some voltages and found no voltag drop on R12 (Drop = 0V). The voltage drop on R7/13 is 1,45V, that should be okay. On R15 it is 39V, representing the 0,36mA figure, so this should be fine, too (rails are at +/-21,5V). At the moment the feedback resistor (R16) is not in the circuit, because i adjusted P1. Voltage drop on R6 and R14 are both 1,5V.


With the feedback resistor (R16) installed i found a voltage drop on R11 = 1,2mV, R12 still 0V. But something else changed: the drop on R2 became 26mV, befor it was 15mV, same value as on R1.



After that i checked the base voltages on the transistors: Q7/8/14 in the range of +20V, Q11/9 at -20V; but Q10 at about +16,6V. I expected it to be -20V or so. Can someone give me an hint? Thank you!


Best regards,
Michael
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Old 22nd January 2019, 10:14 PM   #110
takitaj is online now takitaj  United States
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Check you didn't swap Q9 & Q10. Q9 = 1845 Q10 = 992. Also check polarity of D1. Does D1 light?


TJ
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