Hi there,
I have just finished my C'tone build and it is working pretty good. Sound is coming along as I am burning in and tweaking my trimmers.

My main concern is voltages with the Hammond 290DEX (for UK).

On V4 and 5 I am getting 470-474V with TAD 6L6 WGC and V1-1 is a bit high at 207V with an old Telefunken. I have tried some different V1 and V2 tubes but it seems about the same.

V3 is a Sovtek LPS balanced up at around 298V.

I have attached the layout showing where I was told to look at dropping the voltage to V1. I have tried some different values but I can only get the voltage up not down.

This is only my second build so I am no expert. I really would like to get the V1 down to 195-200V as this would be a good starting point for tone tweaking.

Nobody said this was gonna be easy..... Cool
Thanks
Rog

Many thanks for that Erwin, I found that I hadn't connected the ground to the FET simulation resistor (220K) on the right
I now know how to tweak the voltages on the pre amp and that is another thing learned

Once that was done, I am now getting 194 or so on V1 and 205 on V2, which should do fine. At low level, it sounds fine, hopefully today I will get a chance to crank it a little

I have a choke /resistor on a switch, which I can hardly tell at low volume and an HRM lift which really does boost it but I kinda like the HRM sound. PAB on and HRM off turns it really wild

There sure are a lot of tones in there, I'm loving the clean too, even the Strat sounds really jazzy if you play with the options!

All in all I am very pleased with it. I'm just building the head cab today, got to finger joint the panels, no fun, I can tell you!


Thanks mate
Cheers
Rog

Yes mate, just come in from the garden, I have done 4 of the edges. I did build a jig and the router is mounted in to a B&D workmate. Just push the panels across the router bit, nice square cuts, move the jig and cut the next one, easy.

The last one I did in pine, and it cut cleanly. This 18mm ply disintegrates as you cut it

I have started to cut the vertical cuts with my saw so it doesn't splinter too much.

It will all look lovely when it's finished and covered in sexy blonde tolex... mmm