Hi I wonder if anybody can help me with a problem with my HH micro 30. I have been using valve amps for sometime now but I've had this amp for 30 years now and it's got a bit of sentimental value if little actual value. My son was using it until recently when he brought it to me saying it wasn't working. I had a quick look and noticed the power smoothing caps looked dodgy and the two small fuses had blown. I replaced the power caps with the nearest equivalent (63v instead of 45v) and one of the rectifier diodes which I thought was giving an odd reading. New fuses and the amp came back to life. I thought that the volume was a bit lower than I remembered so I replaced some of the other caps. The amp seemed ok and I used it for a couple of gigs to give it a bit of a road test. However last time I came to use it I could hardly get any volume out of it at all. Cleaned all of the pots and retested some of my new joints but can't find anything obvious. The new caps were a big bigger so are a bit of a squeeze.

I'm really not very experienced with electronics, although I can follow instructions.

Another symptom is that the amp makes a loud pop when removing the jack from either the hi or low input

Any thoughts please