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Artisan 15 Tube Position and Function
Posted: Mon Sep 02, 2013 9:28 pm
by spike01970
Hi, Just want to know if mine is correct as i got it second hand, as follows -
TAD 7025 - EF86 - ECC83-EL84 - EL84 - EZ81 - That is the order of them, is this correct. and what is there function and relevant no V1 V2 V3 etc
I understand that the EL84 are the power tubes and the EZ81 is the rectifier but are the three i have underlined in the correct position ?
Thanks
Re: Artisan 15 Tube Position and Function
Posted: Tue Sep 03, 2013 8:52 pm
by spike01970
This is what i found out so i will share with you, may help someone =
V1 = ECC83 Ch 1
V2 = EF 86 Ch 2
V3 = ECC83 P Inverter
V4 = EL 84 Power amp
V5 = EL 84 Power amp
V6 = EZ 81 Rectifier
Changing power amp valves for other make EL 84 is fine and no bias required.
The above is a basic explanation of tube function but will help anyone like me who likes to tube roll
Re: Artisan 15 Tube Position and Function
Posted: Thu Oct 11, 2018 8:11 pm
by Mr Co
Can some one confirm is this picture correct regarding tube positions?
Re: Artisan 15 Tube Position and Function
Posted: Fri Oct 12, 2018 12:03 pm
by thebigiam
Yes you are correct !!
Re: Artisan 15 Tube Position and Function
Posted: Fri Oct 12, 2018 12:04 pm
by thebigiam
tell me do you notice any difference in volume between ch1 and ch2 on same levels?
Re: Artisan 15 Tube Position and Function
Posted: Sat Oct 13, 2018 10:58 am
by Mr Co
Yes!
How do you know and why did you ask?
Re: Artisan 15 Tube Position and Function
Posted: Tue Oct 16, 2018 10:51 am
by Mr Co
I hear some strange crackling whan I trun the CH2 to max....
You can hear it here....
https://files.fm/u/8x46tvk6
Re: Artisan 15 Tube Position and Function
Posted: Tue Oct 16, 2018 3:53 pm
by Mr Co
This is strange.
There is a clear sound from the speaker when I tap on the two preamp tubes while the amp is on (two tubes on the far right - 12AX7 and EF86)
What is strange that this only happens when I turn on chanel 2.
Its not audiable on chanel 1.
These are bad tubes that need t be replaced, right?
But why I dont here this on chanel 1
Re: Artisan 15 Tube Position and Function
Posted: Fri Oct 19, 2018 3:31 pm
by Mr Co
New preamp tubes arrived today and in the went.
No more problems
One question, can I put in V1 slot an 12AY7 tube without any amp moding?
Re: Artisan 15 Tube Position and Function
Posted: Fri Oct 19, 2018 8:24 pm
by Sonofarich
Yep...no problem, although wouldn't you want the gain reduction (or rather taper) to be in V2?