pete.young

In this case, I'm entirely responsible. I've learnt my lesson - no more guesswork, take it to someone who knows.

There's a happy ending to the story. The amp is now fixed and there was nothing wrong with the power module. I'm going to describe it briefly, in case someone else has the same problem and finds this thread. The Amp Genius who fixed it initially took off the top cover, unscrewed the aluminium front panel, cleaned everything and it started working again. Until he put the top cover back on , when it stopped working again. There were two problems: firstly the front panel wasn't earthed, instead relying on the securing screws fixing it to the chassis for an earth connection. Secondly , the pots are mounted on the front panel and connected to the PCB by thin metal strips with a 90 degree bend and a shoulder that goes through the back of the PCB. The shoulder of some of these pot connectors was making contact with the tracks on the PCB, and causing a short. The fix was to file back the shoulders of the offending pot connectors, and properly earth the front panel to the chassis. I've included an amp guts picture I took at the time which illustrates the panel and pot connections. For an added bonus, the thermal sensor on the heat sink had failed, so AG replaced it with a 50 deg C sensor and the fan now comes on and off when needed.

LM-2 seems to do what you want - plug the 2 channels into A and B returns and use the A+B setting.

Before my hands toughened up , I used to put surgical spirit on the blisters. I have Presto Lights on now, which seem to be a lot kinder than the Lycon I started off with.

Couldn't find the original but here's a cover by Geoff Palmer:

Very popular with Dr Spooner, or so I'm told.

What a lovely thing. I had no idea that these existed.

Used to have an Ohm PA amp which was a decent bit of cheap kit. This would have been 1977 - 79 ish.

The LFSys cabs are probably better compared with the Barefaced Big Baby 3. The Super Compact is a single-driver cab, unless you opt for the optional tweeter. LFSys cabs have a crossover and high-mid range driver which the Super Compact lacks, but the Big Baby 3 has. I have a Monza and it goes very loud. Unless you need a large amount of volume, you should probably be looking at an LFSys Goodwood too.

From the original post. So there is no need to consider impedance mismatching, or a foot-pedal tuner to switch off the sound because these are already built-in to the on-board preamp. I've just done live sound for an event which involved several bedroom acoustic players. The biggest issue I had was people leaving their tuners switched on , and not realising that it mutes the signal from the guitar. A talkback mike might be worth considering for the PA guy.

No. Originally it would have had Yamaha alnico pickups.

A basic DI box into the PA will get you going. The ADI 21 is a good way to try some tone shaping, but worth buying just as a DI box even if you don't turn it on. If you have reasonable stage monitors, that's all you need. Depending on how loud you are, and if you don't have any on-stage monitoring from the PA, a small acoustic guitar combo might be worth considering. I have a Roland AC60 which is now discontinued but can be found second-hand. There's also a 30W version, the AC30. It has an anti-feedback filter and other effects such as reverb and chorus, and best of all it can be stuck on a speaker pole so it is at ear height and he'll be able to hear himself.