Tuesday, February 23, 2010

So the Super is sick

I was playing the my new/old super reverb the other night and it started cutting in and out distorting really badly. Seems like something vibration or signal induced, but it's hard to tell for sure. Swapped the tube in V2 around a few times as well as the phase inverter but neither made a difference. It's only in the vibrato channel, so it has to be something in that circuit. I took it back to my boy Casey Gooby again to see what's going on.

We decided it could stand to have the power supply filter caps changed, so I ordered up a some big 'ol blue Sprauge Atom Electrolytics. We also decided the mystery 4ohm output transformer wasn't doing me any favors, so we ordered up a new Mercury Magnetics that is spec'd as an upgrade for a '59 Bassman. What's cool about it is that it has 2ohm and 4ohm taps, so I can run it @ 4ohms for my current 2x10 setup, and if I decide to rebuild it as a 4x10 combo again someday, I can swap it to the 2ohm tap. I'm also considering having JD Newell build me 2x10 extension cabinet, then wire the 2 taps to a switch which would make the impedence at the speaker jack switchable between 2 and 4ohms depending on whether or not I was using the extension cabinet.

Sunday, February 14, 2010

Mah other new baby

A few weeks ago this was a beat to shit 1973 silverface Fender Super Reverb 4x10 combo. I bought it for peanuts and decided to restore it. In the process I discovered it had 4 blown CTS Alnico speakers (which I will recone later) and an incorrect, but still vintage fender 4ohm output transformer in place of the correct 2ohm OT. The tranny was good so it meant that without modification I could run it in a 2x10 configuration for the time being. I had JD Newell (newellamps.com) build me a custom 2x10 combo cabinet out of finger jointed pine, got a new Accutronics reverb tank, a new reproduction blackface faceplate and knobs and a pair of the way too good for the money Eminence Legend 1058 speakers. Got it tuned up and transplanted and she's sweet as can be. Very big sounding for such a small form factor (because of the large output transformer and middle control). Eventually I may get the original CTS Alnico's reconed and restore the old cabinet, or get another 2x10 extension cabinet made for it so I can run 4-10's when I feel like it. Sorry, didn't get any before pictures, but here are the afters (I've got a reproduction 60's Fender grill logo on the way as well).