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Change of tone stack
Posted: 24 May 2010, 08:10
by Mats A
In what year did Marshall change the ton stack from the 56K resistor and the 270p cap on the treble control? How does this change affect the tone?
Re: Change of tone stack
Posted: 24 May 2010, 13:27
by SteveD
I recommend you get the following book which will pretty much answer all of your usual questions Mats; -
http://www.amazon.co.uk/gp/search?index ... 0793525098
Re: Change of tone stack
Posted: 26 May 2010, 04:52
by burnsy
+1 recommended.
A good read and a lot of useful information.
Re: Change of tone stack
Posted: 26 May 2010, 15:09
by Mats A
Well thanks for the advice but I´ve had it for years and it doesn´t have all the answeres. It also is a little bit dated and doesn´t have any info on amps and speakers after the early 90´s. maybe it´s time for a new book!
And it don´t tell me how to get that Robbo tone
Re: Change of tone stack
Posted: 26 May 2010, 16:01
by SteveD
The tone stack changed when the JTM changed to JMP in about 67 or 68. The later tone stack has more treble and tighter bass.