Hello,
I've made a replica of Selmer TV10 guitar amp recently, but, since I couldn't find any schematics of it, I based on TV15's one (attachment), because TV15 is just bigger TV10. One thing I didn't realize is that TV15 has 15om speaker whereas TV10 has 4om. As a consequence presence/feedback control (aka "Tone"; in red circle) is not working properly, due to lower voltage. Can someone help me to redesign that RC network to match the lower impedance and keep its original sounding?
Thanks for any response.
I've made a replica of Selmer TV10 guitar amp recently, but, since I couldn't find any schematics of it, I based on TV15's one (attachment), because TV15 is just bigger TV10. One thing I didn't realize is that TV15 has 15om speaker whereas TV10 has 4om. As a consequence presence/feedback control (aka "Tone"; in red circle) is not working properly, due to lower voltage. Can someone help me to redesign that RC network to match the lower impedance and keep its original sounding?
Thanks for any response.
Attachments
Yup, you halve the impedance of everything, which means halving resistances and inductances, and doubling capacitances. The word is 'ohm', named after Georg Ohm.
OMG! 😱 I hope you're using a reliable isolation transformer to run this unit? Remember that Keith Relf (member of The Yardbirds, then Renaissance) got electrocuted by an amp like this one in 1976!
Best regards!
Best regards!
Yeah, I didn't make a Widowmaker. I've got a transformer with 1:1 winding and 6.3V winding instead of those high power resistors and of course 3 prong chord. Only indicator light is supplied directly from mains.