"Black Flag" JTM schematic

Moderator: VelvetGeorge

Post Reply
User avatar
Flames1950
Senior Member
Posts: 9294
Joined: Sun Feb 08, 2004 1:04 am
Location: Waukee, Iowa

"Black Flag" JTM schematic

Post by Flames1950 » Fri Jan 26, 2007 12:16 am

The HOM book also has the eight can Black Flag JTM amp schematic in there -- the single rectifier version. George's standard Heyboer made 1203-80 tranny works with the single rectifier version just fine.
Attachments
Alternate Schem - 1967 Hand Drawn.gif
Early '67 JTM
Alternate Schem - 1967 Hand Drawn.gif (46.72 KiB) Viewed 3317 times
Image

User avatar
Flames1950
Senior Member
Posts: 9294
Joined: Sun Feb 08, 2004 1:04 am
Location: Waukee, Iowa

Post by Flames1950 » Sat Feb 10, 2007 12:12 pm

The above schematic is the single rectifier version, here's how to wire the dual rectifier version. All caps are 32uF, and your 1203-80 transformer replica has got to have the two individual secondary B+ windings. Courtesy of Brian Wallace, who helped me quite a bit in figuring these amps out.
Attachments
1203-80 Wiring.jpg
1203-80 Wiring.jpg (33.64 KiB) Viewed 8050 times
Image

User avatar
novosibir
Senior Member
Posts: 4626
Joined: Tue Nov 22, 2005 2:32 pm
Just the numbers in order: 7
Location: Nuernberg, Germany
Contact:

Re: "Black Flag" JTM schematic

Post by novosibir » Wed Feb 25, 2009 9:49 pm

Andy, did you already notice, that in this schem the 27K FB resistor is on the wrong place?
It has to be placed 'above' the conjunction with the 10K tail resistor :wink:

Larry
The fault almost always is sitting in front of the amp :wink:

Larry's Website now with included Pix's Gallery

User avatar
Flames1950
Senior Member
Posts: 9294
Joined: Sun Feb 08, 2004 1:04 am
Location: Waukee, Iowa

Re: "Black Flag" JTM schematic

Post by Flames1950 » Wed Feb 25, 2009 10:26 pm

Ha! Never looked that closely at it I guess.....pretty much knew what I was building anyway so I didn't notice.
Image

Post Reply