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A brand new set of valves will get your amp sounding like new again. Over time your valves will lose their tone and their power. See the list below for the right valves for your amp. The Vox AC30 amplifier uses a variety of valves depending on the year of manufacture. If not completely down on the jacks, these plugs can cause a high pitched whine in your amp.Looking for great sounding valves for the Vox AC30 amplifier? You’ve come to the best place. Check to make sure that these plugs are firmly connected to the chassis mounted jacks. Such reverb pans need to be replaced.Ī second problem involves the red and white RCA plugs that connect to circuit board mounted jacks inside the AC30CC chassis. The picture at left shows a pan with two of the three reverb springs broken. Broken springs will vibrate on the bottom of the reverb pan, making a rattly distorted sound in the speakers when you turn up the reverb.
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It is possible that one or more of the springs might be broken on either end. When opened, you should see three springs that are connected to transducers on either end of the reverb pan. Remove the small screws that retain the plywood base that covers the bottom of the reverb pan. Once the screws are removed, you can slide the reverb pan out of the bag. The vinyl bag is secured to the bottom of the amp with four screws through the corners of the bag. The reverb pan is in a vinyl bag on the inside bottom of the amp. The most common cause for this problem is caused by broken delay springs in the reverb pan.
#Vox ac30cc2 replacement tubes series
There are two reasons why this might happen to an AC30CC series amp, and you can fix either problem yourself. He also reported that the reverb was very weak. One of my customers reported that his amp made some high pitched squealing when he turned up his reverb. Remove this carefully to avoid breaking the tube. It is held in place by a big spring loaded cap. If your amp is blowing fuses, replace this tube, it is likely the culprit. Each tube makes about 8 watts, so the combination of four EL-84 tubes give the AC-30 it's 30+ watt output. The tube at right has it's retaining clip released. The EL-84 power tubes are secured by a retaining clip. Along with the filter caps, this tube converts the AC line voltage to DC voltage to operate the amplifier. The largest tube is the GZ-34 rectofoer tube. The four matching verical tubes are the EL-84 outputs. I recommend Sovtek premium 12AX7 Russian made tubes for this amp. This tube is most likely to survive for many years without failure, but it is the only tube in the amp that is prone to become "microphonic." A microphonic tube acts like a microphone inside the amp, causing weird distorted sounds or, in extreme cases, feedback howls. The three tubes that are mounted horizontally are 12AX7, or ECC83 preamp tubes. There are three kinds of tubes in an AC-30CC2. Pull the chassis straight out of the cabinet and set it on a work surface with the plywood "slider" supprt board facing down The screws are about 2" long, they will require lots of turns to remove.įor clarity, this is the top side of the "chassis rail." The chassis is actually resting on this strip of wood.Īfter the four vertical facing machine screws are removed, the chassis will then slide out of the cabinet.Īnother view of the chassis sliding out of the cabinet, exposing the tubes. These go through the "slider rail." Two screws each are on the left and right skier rails of the amp, near the speakers. Remove four machine screws that face the top of the amp.
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On these amps, you must unsolder the leads to the speakers and remove the reverb pan to remove the amp chassis. Additionally, unclip the red and black speaker wires from the plywood board that supports the chassis.Įarlier production models have hard wired speaker wires and non-detachable reverb leads. Pull two reverb and one speaker cable ends off their chassis mounted jacks. Later production of the AC30CC Series amps have speaker and reverb cables that are detachable from the chassis. Removing the lower back makes removing the chassis easier, but is not totally necesaary. Here is how.ĭisconnect the power cord from both the amp and the wall socket. It isn't hard to change tubes on a Korg/Vox AC30CCSeries Amp. AC30CC1, AC30CC2 and AC30CC2X Owner Service Information