AMI Jukebox repair – 1958 AMI 200 Jukebox

AMI jukebox repair

Another first for Keld Ampworks – the first AMI Jukebox repair. I’ve turned down jukebox repairs in the past because I naively had visions of a 7 foot unit arriving in my rather small workshop! This customer was quick to clarify that the amp unit itself is quite small and transportable from his Lincoln location. Nonetheless he sent me some pics of the full unit (above).

AMI jukebox repairIt is a US unit, bearing original battle scars and running on 110V through a transformer.

It was exhibiting a loud hum and excessive breakup. The customer asked me to do a basic valve test and check over and then report back.

It runs a preamp with one 12AU7 and one 12AX7, then a 12AU7 cathodyne phase inverter and a cathode biased 6L6 pair. One 12AU7 tested faulty (replaced with a valve from the customer’s collection), but the main problem was down to the badly worn 6L6 pair (replaced with a brand new matched pair of Russian EHX valves).AMI jukebox repair

US amp manufacturers in the ‘old days’ didn’t tend to Earth their amps. All amps that leave my shop should have correct earth, fusing and safety practice so I fitted an external earth to this unit. Since the unit goes inside another unit this was fitted with a flying lead and solder tag to screw to the main chassis.

This is a favourite toy of the customer’s grandchildren and I’ve since heard that they’ve given it a thorough testing!

If you need an AMI jukebox repair, please get in touch.

Laney speaker change – VC30


This Laney speaker change job came down from York last week. The Laney VC30s are great amps but sadly are supplied with quite bland speakers. My customer asked me to fit a Celestion V30 to replace the stock HH driver.

It’s owned by a professional guitarist who bought it as a spare – unfortunately the amp also had a bad case of ‘snap, crackle and pop’ so whilst en route to gig he brought it to me for investigation and a speaker change.

The speaker change was a success. Because I’ve had experience of microphonic howls in Laney amps, I was initially concerned about the V30’s greater magnet size and proximity to the valves, but this turned out to work well. You can hear the results of the speaker change below, a great improvement!

In another Laney speaker change, I had good results with an Eminence Legend, I’m afraid the audio isn’t as good on this one!

The crackling issue turned out to be the phase inverter valve, one if two 12AX7s which failed in my valve tester.

If you have a Laney VC30 speaker change or repair, drop me a message and we’ll bring your amp to life!