After many years of sitting around I finally powered up my Peavey VXT Classic. I acquired it along with a 1966 KAY Truetone Guitar for the amazing price of $25.00. Anyway after God knows how many years of not being used I fired up the amp and she sounded Great!!! I do not have the foot pedal so I used the dirty channel but really kept it as clean as I could. Just at the point if I rolled my volume down on my guitar she would be fairly clean & and if I cranked the guitar up to 11 the amp would break up. I was really impressed with the tone and it had a mile of headroom.
Well that didn't last very long. Maybe a couple of hours over several days. Two days ago I noticed that the amp started to sound like it had some type of effect on the lows like a octave shift or something that lasted about as long as took me to walk over to the amp and really give it a listen. Then it developed a static-Distortion my guitar was still audible but it had a hell of a lot of noise along with it. I plugged the guitar in to the return and it does the same thing.
So I spent most of yesterday reading the old inter web and came to several conclusions: I downloaded the Schematic. I ordered 2 100 uF 350V Axial Electrolytic-Illinois Capacitors, Several Audio driver transistors (MJE 15030) for Q7 & Q8, 2n3904 transistors for Q4 & Q5, and a new set of tubes. After looking at the board it looks original and for an amp that was made in the early 80's I thought that was good. The large Caps on the power side have slight splits in the cover of the cap. Other than that it looked okay.
I really don't have a lot of experience with electronics other than a couple of soildering jobs with cold joints and an upgrade I did on my Epiphone Les Pual. Upgrade included: SD Humbuckers, CTS pots, Orange Drop Caps, Switch Craft switch, and 50's style wiring.
My question does anyone know of a procedure I can do with your help that would or could possibly pinpoint the problem?
Like I stated earlier. I don't have a lot of experience but I'm no dummy!!! LOL... I have a Fluke 26III True RMS Multimeter & Fluke 12 Meter & quality Wells soldering gun. So I'm pretty dangerous with all that equipment...... LOL
Please Help if you have knowledge and Patience?
Well that didn't last very long. Maybe a couple of hours over several days. Two days ago I noticed that the amp started to sound like it had some type of effect on the lows like a octave shift or something that lasted about as long as took me to walk over to the amp and really give it a listen. Then it developed a static-Distortion my guitar was still audible but it had a hell of a lot of noise along with it. I plugged the guitar in to the return and it does the same thing.
So I spent most of yesterday reading the old inter web and came to several conclusions: I downloaded the Schematic. I ordered 2 100 uF 350V Axial Electrolytic-Illinois Capacitors, Several Audio driver transistors (MJE 15030) for Q7 & Q8, 2n3904 transistors for Q4 & Q5, and a new set of tubes. After looking at the board it looks original and for an amp that was made in the early 80's I thought that was good. The large Caps on the power side have slight splits in the cover of the cap. Other than that it looked okay.
I really don't have a lot of experience with electronics other than a couple of soildering jobs with cold joints and an upgrade I did on my Epiphone Les Pual. Upgrade included: SD Humbuckers, CTS pots, Orange Drop Caps, Switch Craft switch, and 50's style wiring.
My question does anyone know of a procedure I can do with your help that would or could possibly pinpoint the problem?
Like I stated earlier. I don't have a lot of experience but I'm no dummy!!! LOL... I have a Fluke 26III True RMS Multimeter & Fluke 12 Meter & quality Wells soldering gun. So I'm pretty dangerous with all that equipment...... LOL
Please Help if you have knowledge and Patience?