YJM 100 preamp tube functions and locations

Yngwie Malmsteen's YJM

Moderator: longfxukxnhair


Uli Jon Blackmore
<25
<25
Posts: 5
Joined: 07 May 2014, 10:31
Has Liked: 0
Been liked: 0
Contact:

YJM 100 preamp tube functions and locations

Postby Uli Jon Blackmore » 26 Aug 2015, 11:48

Hi all
I am planning on retubing my YJM 100 with NOS glass. I understand that one of the four preamp tubes toes not really effect tone (something to do with the reverb iirc) and, if that is the case, I do not want to put expensive glass in there. I believe that this is V3 (the third from the left, I thing) Can anyone confirm this or tell me which tube serves this non-tone function.

Thanks

surfnorthwest
El Jefe
El Jefe
User avatar
Posts: 17468
Joined: 31 Jul 2007, 19:02
Location: Vero Beach Florida
Has Liked: 4353 times
Been liked: 7813 times
Contact:

Re: YJM 100 preamp tube functions and locations

Postby surfnorthwest » 26 Aug 2015, 17:48

V1, V2, V3 operate the same as any 1959 amp, the fourth preamp tube in V4 compensates for any volume lost while the noise gate and reverb are engaged.
My Gear
Surf's Jukebox

Image
'When I Don't Have Anything Interesting to Play, I just Play Fast' But then who wants to hear 64 bars full of 32nd-notes except the douche-bag blowing them from the stage.


Uli Jon Blackmore
<25
<25
Posts: 5
Joined: 07 May 2014, 10:31
Has Liked: 0
Been liked: 0
Contact:

Re: YJM 100 preamp tube functions and locations

Postby Uli Jon Blackmore » 26 Aug 2015, 18:20

Thanks so much Surf. I am getting 2 Brimars, 1 Tungsram, 1 RFT, 1 BEL, 1 pre-war Ei, & 1 Matsushita NOS and will be rolling them in V1-3 to determine the best mix. Those that do not make the cut will go into my ENGL Blackmore.

surfnorthwest
El Jefe
El Jefe
User avatar
Posts: 17468
Joined: 31 Jul 2007, 19:02
Location: Vero Beach Florida
Has Liked: 4353 times
Been liked: 7813 times
Contact:

Re: YJM 100 preamp tube functions and locations

Postby surfnorthwest » 26 Aug 2015, 18:56

You might also experiment with different power valves, that could really change up the amp. The YJM can autobias most powervalves.
My Gear
Surf's Jukebox

Image
'When I Don't Have Anything Interesting to Play, I just Play Fast' But then who wants to hear 64 bars full of 32nd-notes except the douche-bag blowing them from the stage.


Uli Jon Blackmore
<25
<25
Posts: 5
Joined: 07 May 2014, 10:31
Has Liked: 0
Been liked: 0
Contact:

Re: YJM 100 preamp tube functions and locations

Postby Uli Jon Blackmore » 27 Aug 2015, 06:49

Thanks Surf. I did that a few years ago after reading up on it and ended up with NOS Siemens El 34s.

Return to “Marshall YJM 100”

Who is online

Users browsing this forum: No registered users and 1 guest