Chienmortbb

Ampeg took about 8 iterations of the PF500 before the problems were resolved. The PF350 and PF800 did not seem to suffer in the same way.

Oh yes, especially if they are all powered from the same power supply. The cheaper Chinese ones are NOT isolated although they say they are. This means that noise, especially from digital pedals, can feed around the power rails, entering the signal chain via a high gain analogue pedal. So the likely culprit is the lead guitarist.

I am not so sure if it is "in the mind". I have an Aerodyne Jazz, P/J but with a jazz neck and while that was being refurbished (flood unfortunately), I bought a Peavey P Bass copy to play. It has a lovely neck, and it was only later that I realised that the Jazz and Precision did not share the same nut width. So I measured the Peavey, and it is 38mm, the standard Jazz neck width. I have played various Precision's, and it was not difficult, but it did seem to require more work, more concentration. Now that could also be down to the neck profile, I have not looked at that.

Shielding material is usually conducting rather than insulating.

Native North American wood, using sensible production methods, honed to perfection over several years making Telecaster and Stratocaster guitars. Hardware is adequate, finish, automotive paint. Not rocket science but then again neither is Rocket Science,

I must be blind but I can't see that.

I still have the originals, but I suspect they may have changed over 20 years of production. Next time I see them (chaos as usual here) I will measure them.

I cannot find that mic ceiling fitment on the K&M website. Ah, it seems you can only buy it with the mic stand.

Where did you get it?

As the original J pickup was the usual antenna, I bought a set of DiMarzios from @Dood. It is called a Jazz as the body shape is like a Jazz. However, the real ones, always had a P pickup at the neck. I would never have bought it with two single coils. Mine came directly from Japan, before Fender got heavy and stopped the Japanese music companies selling overseas. Even with shipping, vat and duty it cost about half the cost of a new one in the UK.

What. My black one or the OP's? When I first saw a Black Aerodyne Jazz in my local shop, I thought "Ooh nice, I bet it does not play or sound as good as it looks". So I played it and loved it. It has a 7.5" neck radius, so will not be to everyone's taste, but the new ones have a flatter neck, removing one of the almost unique features. Mine has survived a flood that consigned its hard case to the great musical skip, but with a little TLC the one shown above survived. I also bought it with some of the money left to me by my Mum, so "don't dis de Aero". Gad to see you got home safe from Outer Mongolia Somerset last month.

The front pickup is wrong, the rosewood is too pale, and it does not have an output jack! Of course, I am the proud owner of a 2003 AJB65, the original Aerodyne Jazz, or actually a PJ.

What part of Darzet?

I am about nine foot tall (well 6ft2) The biggest problem is bending down to tweak a knob.

No, the Government Front bench Active several knobs, with a couple stacked upon each other.

I stood behind my cab at a recent gig and heard it quite well. Of course, dispersion is as much about the audience as ourselves. We bassists are not so cavalier with our fans as the guitards.

What is a tube? I would say a 15-30 watt valve amp would do the trick😀

If you have to point is at yours ears, the dispersion is wrong, stinky poo, not very good. That means, as you tilt it, you hear better and everyone else hears worse. To get the mid-dispersion you need a cab with a high quality horn coupled to a high quality compression driver similar to those @stevie uses in his LFSys cabs.

That is the quiescent current setting for the output MOSFETS. It will not affect the 40mV offset at all. Move it without either marking its position with have one of two consequences, The first is that too much quiescent current will be drawn, and the output stages will run hotter than normal. The second is that the MOSFETs will not be biased correctly, and you will get increased crossover distortion. The 40mV DC offset is almost irrelevant IMHO. The Circuit Diagram (what our US cousins call the Schematic) for a typical Trace power amp is shown below, but I suspect your problem lies elsewhere. The fact that connecting the input to 0V or ground solves the problem means that the issue is in the preamp/EQ section. Start at the front by shorting the input to the preamp. However, the link to DIYAudio above suggests an earth loop problem, and I would not attempt that unless you are confident that you can do it safely. The power amp Circuit Diagram linked above shows that same connections to the preamp/main PCB as the GP7. See Below: Check the ripple (AC voltage) across C29, C26,C27 and C28 as well as the DC voltages across them.

That is an example of current limiting.

To be honest, I do not think that price will be around for long. It costs about that price to buy the parts. For example the RA Silent plug is at least £12 everywhere, If the soldering is done properly, That will be a great buy

That would be a good cable except the picture show the cable a SC-Club. That is a microphone cable. The text says Sommer Spirit. If they are using Sommer Spirit with those connectors that is a good price. However the P&P will be about £6.

This is from the User Manual, so the they have the same power supply specs.

Almost certainly, although they claim 1400 watts for the 15 as opposed to 1200 for the 12. Probably just marketing BS anyway.

Sorry for the delay, I don't recognise that PSU. I am happy to have a look at it if you want to send it. Although the PSUs seem to be more reliable than the power amps.