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Thanks for the post man.. I was starting to wonder since we got no reply's.. lol We found the Resistor and will be changing it tonight.. here's to getting this fixed and not having to worry about something so well crafted breaking down so much.. a little disappointing since my Chinese made...

Hi again.. wow just picked up this head and if you see my other post I had tube issues.. I replaced the tubes and it played great but noticed some feedback that wasn't normal.. we pulled the board and noticed a resistor fried.. we're trying to figure out what type it is and any help would be...

Since they are all GRN I don't know about A or B.. I looked at the sockets and they are clean but no label A or B.. the plate inside just says ABCD for tube placement.. I'm going to try and embed a couple pics.. you should see the gold lettering and flip it over and the 2 end tubes have a dark...

Thanks for the response.. a friend of mine mentioned the Gold color is probably from the heat as well.. and those were the ones glowing red hot.. specifically the last tube on the right. I'm going to order a new set of tubes to test before I ship this to Mesa.. The question is with the...

Hello, I just recently acquired a Mark iv B head.. everything was fine until I blew a fuse.. replaced it and it was working great until last night.. here's what happened: We were using the silent recording and had the recording knob on the back cranked and the master in the front around 8.. I...

Hello, I am looking for a Mesa Mark IV "B" Head to purchase.. no combos/modified heads please.. Thanks!