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that came off for tonal prefference, but the hum was unchanged, and present both before and after. tried a few different values here and on the other triode of v1, but it made no difference to the noise.

ok cheers for the suggestions, i will experiment over the weekend. lead dress and grounding seem to be the main suggestions, i shall tidy up and re dress my ground points. do you think the proximity of b1 supply lead to feedback loop to presence lead might also be inducing some troubles? cheers agai...

[IMG:1024:768]http://i567.photobucket.com/albums/ss115/tomugli/DSCN4593.jpg[/img] [IMG:1024:768]http://i567.photobucket.com/albums/ss115/tomugli/DSCN4596.jpg[/img] (jack changed to chassis grounded version now, no difference) [IMG:1024:768]http://i567.photobucket.com/albums/ss115/tomugli/DSCN4597.jp...

thanks for the quick replies! the ot is grounded to the output jacks, but the hum is pre ot i think. would it perhaps be wise to try altering this anyway as better practice; no stone left un turned and all that! i will try changing the v1 supplying filter cap ground, as this is on a seperate wire to...

hi, first time poster here, though i've been reading for a while. I've just finished an express clone with kt66's and a few little mods and sods, but nothing drastic! it sounds awesome as far as tone goes, but there is an awful hum that gets louder both with volume increase and presence increase (po...