Concert lead troubleshooting

[cantkillanidea]

Recently, I've noticed a drop in gain/volume in my concert. It's not constant and I don't know of anything that would be triggering it. For example, today at practice I had the distortion on 10 and the volume around 6 but it sounded like it was only slightly overdriven. Any ideas on how to fix this problem?

[loudthud]

Which generation of the Concert do you have? Are you using the footswitch?

[cantkillanidea]

The black face with red knobs. Also, no footswitch

[cantkillanidea]

Bump

[djc]

I have a silverface.  I've always thought the distortion was weak.  I just use a tube screamer to overdrive it.  30 years old, I'm sure there is some doo-dad shot but I kinda like it and don't really want to leave it with a tech for a month.  sorry I know it doesn't help you but thought I'd share my 2cents and bump the post.  someone may have advice for you, mine is get it to a good tech and refurbish the amp.

[mckinnon audio]

  Hi there,I believe the pc boards aren't hard wired to each other.They have a single male/female pin on each wire,I naver cared for these too much,tend to oxidize and become loose over the years.I'd try cleaning up the pins and soldering them together,esp the grounds and the power supply connections,I've done this to mine,and it seems to have cured a lot of faults.Good luck,Mel.

[djc]

Mel, would you happen to have pics of the specific part you are refering to?

[mckinnon audio]

   Hi there,sorry my camera's down at this time,but look at the topic,Solos II,I believe it's three or four topics below this one.There's a pic of the drive stage transformer,upper left hand corner,11 wires,all connected this way,each wire has a male pin and slides onto a female pin on the pc board.After 20 - 30 years,I don't trust these so I clean them up and solder them together.It makes a bit more work if you have to take the amp apart,but you have a better connection.Mel.