Spencerleehorton
Well-known member
Hi all,
Armed now with a great source of knowledge and working my way through this book:
https://www.valvewizard.co.uk/Book1.html
I’m going to attempt to mod my other plexi 1959 50W I’ve built to try out some mods and see how it sounds.
I’ve added another first gain stage into the plexi and having two input jacks, one for standard plexi and the other for the extra gain stage.
The other jack sockets will be replaced with 1M gain pot and 1M master volume, as I’m going to remove the PPIMV pot and put back the two 220k resistors.
I’ve added the gain stage and so far the plexi sounds great at half gain but I’ve not changed the PPIMV to mst vol between tone stack and PI.
When I turn up extra gain stage past half way I get squeals and wah wah overloads the signal?
Could this be the PPIMV?
I’ll add the mst vol tomorrow and see if it improves.
Will also try mst vol pre tone stack to see how it sounds.
Armed now with a great source of knowledge and working my way through this book:
https://www.valvewizard.co.uk/Book1.html
I’m going to attempt to mod my other plexi 1959 50W I’ve built to try out some mods and see how it sounds.
I’ve added another first gain stage into the plexi and having two input jacks, one for standard plexi and the other for the extra gain stage.
The other jack sockets will be replaced with 1M gain pot and 1M master volume, as I’m going to remove the PPIMV pot and put back the two 220k resistors.
I’ve added the gain stage and so far the plexi sounds great at half gain but I’ve not changed the PPIMV to mst vol between tone stack and PI.
When I turn up extra gain stage past half way I get squeals and wah wah overloads the signal?
Could this be the PPIMV?
I’ll add the mst vol tomorrow and see if it improves.
Will also try mst vol pre tone stack to see how it sounds.
