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I had forgotten how many screws had been removed to take this guy apart.
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This is a nice shot of how the signal path moves from one section of the amp enclosure to another. Now everything is hooked up again and the reverb tank really, well, reverbs! I think we’ve got it fixed now. That should keep this from happening again. While I’m at it, I’ll add a second tie strap. Here, I’m using a tie strap to hold the ferrite choke away from anything delicate. The only support for this choke was the wires from which it was dangling, and you saw the damage it caused. This part has nothing to do with sound reproduction or tone, but was likely added in an effort to comply with FCC or UL regulations. While I’m on a rant about lead-free solder, let me rant about this ferrite choke. In my experience, the lead-free solder is a bit brittle, so this particular solder joint was at-risk since the day it came from the factory. The original Chinese solder was that high-melting-point lead-free stuff, containing lots of tin. And I don’t want to be anywhere near the hot soldering iron when I’m fixing this.Īh, that’s much better. I’m using a pair of tweezers to get the wire lined up because my big fat fingers won’t go inside the amp here. I removed some solder from the RCA bulkhead connector, so I can make a new solder joint. Space is cramped, so I took some time to set up this portion of today’s program. This open white wire goes to the RCA plugs that actually plug into the amplifier circuit. This is a view from the other side of the black panel in the previous picture. Interestingly, the loudspeaker wiring goes through this quarter-inch jack, greatly simplifying service. The signal passes through the amplifier cabinet through these bulkhead RCA connectors. The cables from the reverb tank plug in here. The other end of those red and white cables terminate in the bottom panel of the amplifier cabinet. The red and white RCA cables go to and from the reverb tank. But this clamp-on ferrite choke does not appear on the schematic. Have I failed?Ī visual check sometimes yields the quickest results. We are ON but nothing is coming through the reverb circuit. Some techs cuss at the rubber shock mounts around the tubes as you see here because they interfere with inserting the tube into the socket.
Vox ac30cc2 problems free#
Thankfully, economic sanctions against the Russians haven’t pinched off the free flow of SovTek 12AX7 tubes. The current through this tube barely moved the needle.Ĭomparing the bad tube to its neighbor, the getter material is a little darker. Time to check the preamp tubes, seen mounted horizontally behind the final amp tubes in the foreground. The chassis slides out of the back of the amplifier. Wharfedale supplied loudspeakers for AC30s for one year, Sure enough, here they are! Now I’m really curious what is going on here. Even a Chinese amp should be pretty solid for a few months. This amp was purchased new just a few months ago from a major retail chain.
![vox ac30cc2 problems vox ac30cc2 problems](http://www.voxshowroom.com/ct/amp/uk/AC30CC/chassis_slide.jpg)
Slapping the tank didn’t bring forth any spring sound, so it’s time to get it on the bench for some minor surgery and some amp tech porn pics! The foot switch checked out, so we loaded it up and worked on it at the Unbroken String lab.Ī gorgeous amp, built like a tank, sounds sweet, but no reverb. Mark’s like-new Vox AC30 worked well, except nothing came through the reverb signal path.