Search found 5 matches

by mc41
Mon Dec 30, 2019 3:13 pm
Forum: Dumble Discussion
Topic: Dumbleland Overdrive Special!!!
Replies: 85
Views: 19881

Re: Dumbleland Overdrive Special!!!

Now owned by John Mayer !
Dumbleland overdrive special 006
He had the amp on Dead and Company 27-28 december 2019
by mc41
Sat May 06, 2017 11:07 pm
Forum: Technical Discussion
Topic: PRS J-MOD 100 (John Mayer)
Replies: 23
Views: 4455

Re: PRS J-MOD 100 (John Mayer)

[quote=Bombacaototal post_id=368313 time=1486134525 user_id=16876] The amp is 4x12AX7 with 4x6L6 I would assume it's a ODS like circuit but with a dumblator like buffer on the Loop. So V1=tonestack; V2=Overdrive; V3=d'lator loop; V4=PI [/quote In the Sweetwater video with PRS they say it is inspired...
by mc41
Mon Sep 03, 2012 8:10 pm
Forum: Dumble Discussion
Topic: Two Rock Power Supply Question
Replies: 7
Views: 1369

Re: Two Rock Power Supply Question

Hi,the "D" on the picture is a different rectifier from the PT for the reverb..In the custom reverb it is b+>choke>screengrids > PI > OD > IN with a 10K from PI for the reverb driver..In the classic reverb i think the MiX tube replace the OD and the "D" rectifier is for the "Send/Return tube..
by mc41
Sat Sep 01, 2012 6:55 pm
Forum: Dumble Files
Topic: Need Help. John Mayer sig. Amp.
Replies: 18
Views: 23156

JM sig

All preamp caps are 400v except the feedback ones and the powersection 0.1 (600v)...all tube have 100k/1.5k/4.7uf except the reverb driver..resistor are 2% and 1% dale for input section..transformer made by "classic tone"...??
by mc41
Sat Sep 01, 2012 6:24 pm
Forum: Dumble Files
Topic: Need Help. John Mayer sig. Amp.
Replies: 18
Views: 23156

Re: Need Help. John Mayer sig. Amp.

HI,first the power supply :there is two rectifier ,i tihnk one is 420 b+ (like classic reverb)and the other is a lower voltage (from pt) that goes to a 47uf cap only for the reverb V2(to enhance 3d effect and prevent loadind) ..the rest is like the dumble power supply 2k2/22k/2k2 but there is a 10k ...