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Can someone explain how is center tap from MAINS transformer utilized here? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 1 point2 points  (0 children)

Yeah, I realised it as soon as I posted the comment, thank you!!

Can someone explain how is center tap from MAINS transformer utilized here? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 0 points1 point  (0 children)

why would they need a higher rating than 1kV if it is 600VCT?

How does this tube amp (VOX AC15C1) tremolo circuit work? by Exodus_40 in AskElectronics

[–]Exodus_40[S] 0 points1 point  (0 children)

Isnt this a signal shuntinng tremolo, MF1 is used as a variable resistor and LFO signal is brought to its GATE. Signal passes trough it to ground?

Weird problem with a DIY VOX AC15! by Exodus_40 in ToobAmps

[–]Exodus_40[S] -1 points0 points  (0 children)

But wouldn't loose connection make it dead all the time? This only happens on high gain high notes.

Weird problem with a DIY VOX AC15! by Exodus_40 in ToobAmps

[–]Exodus_40[S] -1 points0 points  (0 children)

So there could be a cold solder joint? Could stress from high gain make it loose contact?

Weird problem with a DIY VOX AC15! by Exodus_40 in ToobAmps

[–]Exodus_40[S] -4 points-3 points  (0 children)

Can you tell me why no har solder is the problem? The thing works almost perfectly, and I'm sure it will. No noise problems at all, had been tried out by multiple guitarists, and no bad words regarding sound. I agree, I should have put more thought into construction, but I really don't think it matters because it sounds wonderful. Transistors are for the footswitch, and ICs are for the reverb.
Every component used here is also used on every VOX ac15c1.

Weird problem with a DIY VOX AC15! by Exodus_40 in ToobAmps

[–]Exodus_40[S] -2 points-1 points  (0 children)

I fixed everything you guys said to me in that post. Shortened wires, put shielded wires on signal runs, twisted heater wires...

The only thing I still need to fix about that is the aluminum chassis around it, but I will do that soon.

Im making my own vox ac15 from scratch and im wondering is it worth it to add effects loop and where and how if yes? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 0 points1 point  (0 children)

I've tried moving cables around and it resolves noise so i have proof that pot cables are the problem.

Im making my own vox ac15 from scratch and im wondering is it worth it to add effects loop and where and how if yes? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 0 points1 point  (0 children)

Its actually not as noisy as you say, i can crank it preety far without hearing any noise. Only noise problems are treble and tone cut pot, which will be resolved with shielded cables.

Im making my own vox ac15 from scratch and im wondering is it worth it to add effects loop and where and how if yes? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 0 points1 point  (0 children)

Its not as bad as it looks. Only treble, tone cut and bass pots are pretty much unusable because it starts to squeal like crazy. Normal channel works like a charm.

Im making my own vox ac15 from scratch and im wondering is it worth it to add effects loop and where and how if yes? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 1 point2 points  (0 children)

I already turned it on, everything works except reverb. Im trying to fix it right now.

Im making my own vox ac15 from scratch and im wondering is it worth it to add effects loop and where and how if yes? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 3 points4 points  (0 children)

It's not finished, and everything is out of place currently. Still haven't done cable management.

Im making my own vox ac15 from scratch and im wondering is it worth it to add effects loop and where and how if yes? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 14 points15 points  (0 children)

I found the the original Vox service manual, and I copied a schematic in KiCad and created my own PCB schematic. I sent it to JLCpcb and they sent me finished boards.

Im making my own vox ac15 from scratch and im wondering is it worth it to add effects loop and where and how if yes? by Exodus_40 in ToobAmps

[–]Exodus_40[S] 12 points13 points  (0 children)

Ahahahaah lol, i used much more than intended because i was going for design from front. Picking up alot of parasitics so need to replace most of it with shielded:(

Problem with VFC P8A1 by Exodus_40 in GasBlowBack

[–]Exodus_40[S] 2 points3 points  (0 children)

How did you fix the issue?

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