1) Volum3 is incorrect – it should be at K1 2) Pin 1 of IC3 needs to be connected to pin 2 of IC3.
I added a link from B6 to C6, under the 470 ohm resistor
Even with this corrections, I’m getting a lot of distortion – more than a typical TS circuit – the tone control adds a lot of frequency dependent noise, especially at higher (CW) settings and the Curve control is doing much more than adding noise.
Vol 3 and the link across pin 1 and 2 has been corrected. Also, 1uF and 220nF caps left to IC 3 must be connected by adding a link. See the updated layout above.
I've noticed a missing cut at O15, otherwise you get lots of loud oscillation. I'm also getting a drifting bias voltage and I can't for the life of me figure out why. Any ideas?
Never mind - I'm an idjit and missed a resistor (twice! I made two!). Sounds great! Much higher gain than a usual TS, I might change the 51K at T2 to a lower value. With the added cut, call it verified!
PN2428 look for everywhere but can't find them
ReplyDeleteHi. It´s probably a typo. Try PN2484 (or BC109, a equivalent)...
ReplyDeletethanks man
ReplyDeleteI built this and found a couple of mistakes:
ReplyDelete1) Volum3 is incorrect – it should be at K1
2) Pin 1 of IC3 needs to be connected to pin 2 of IC3.
I added a link from B6 to C6, under the 470 ohm resistor
Even with this corrections, I’m getting a lot of distortion – more than a typical TS circuit – the tone control adds a lot of frequency dependent noise, especially at higher (CW) settings and the Curve control is doing much more than adding noise.
Thanks for tackling this. I'll take a closer look tomorrow.
DeleteVol 3 and the link across pin 1 and 2 has been corrected. Also, 1uF and 220nF caps left to IC 3 must be connected by adding a link. See the updated layout above.
DeleteI've noticed a missing cut at O15, otherwise you get lots of loud oscillation. I'm also getting a drifting bias voltage and I can't for the life of me figure out why. Any ideas?
ReplyDeleteNever mind - I'm an idjit and missed a resistor (twice! I made two!). Sounds great! Much higher gain than a usual TS, I might change the 51K at T2 to a lower value. With the added cut, call it verified!
Delete