Hi all,
Really hope that some of the Peavey experts on this board can help me bring my Classic VTX back to full health. Right now I've got the issue where the clean channel sounds distorted/fuzzy. I've taken a few steps:
-Replaced all 4558 chips
-Replaced driver transistors Q4, Q5
-Checked for 15v / -15v health
-15v tube bias is present on both
Unfortunately the fuzzy/distorted sound is still present. Could anyone recommend next steps to look into?
I should also mention that the power supply has been re-capped with high quality German made caps.
Thanks so much!
-BW
Peavey Classic VTX - Distorted sound issue, please help!!
Re: Peavey Classic VTX - Distorted sound issue, please help!!
Just wanted to provide an update to this:
-Replaced Q6 + Q7 and the issue is still present
-Also reflowed solder connections on all pots
SUPER stumped on this one!
-Replaced Q6 + Q7 and the issue is still present
-Also reflowed solder connections on all pots
SUPER stumped on this one!
- j0nsnell
- Member
- Posts: 70
- Joined: Wed Dec 21, 2022 1:33 am
- Location: Jurasic Coast, Great Britain
- Contact:
Re: Peavey Classic VTX - Distorted sound issue, please help!!
I would start from the pre amp output and using my oscilloscope, work my way back along the signal path to where the distortion stops. The component/s directly before the distortion starts, is your issue.
Replace just that faulty component, not change everything and possibly cause many more man made issues.
Replace just that faulty component, not change everything and possibly cause many more man made issues.
Re: Peavey Classic VTX - Distorted sound issue, please help!!
The age of the amp would make me suspicious of the electrolytic caps. The 2.2uF caps would be the ones that I would look at 1st.
The more I learn the more I realize how much I don't know.
Re: Peavey Classic VTX - Distorted sound issue, please help!!
Thanks Pappy! I will look into replacing those.
I should also mention that if I plug directly into the Power Amp In, I still get the "distorted/fuzz" sound. Aside from the power supply board itself, there must be something else wrong in the power section.
I should also mention that if I plug directly into the Power Amp In, I still get the "distorted/fuzz" sound. Aside from the power supply board itself, there must be something else wrong in the power section.
Re: Peavey Classic VTX - Distorted sound issue, please help!!
Thanks for the input. I've replaced every electrolytic cap in the amp and it is still having the same effect unfortunately.
Anyone else have any pointers for me?
Anyone else have any pointers for me?
Re: Peavey Classic VTX - Distorted sound issue, please help!!
Are you using the foot switch? The Normal channel is only accesable by the foot switch.
The more I learn the more I realize how much I don't know.