[quote name='Subthumper' timestamp='1403735306' post='2485881']
10K 2 watt should do for discharging smoothing caps. Worth looking over the whole board on ampeg, they went through a period of seeing what was the least amount of solder they could use. Especially check the joints that are under stress mechanically such as the the pots, jacks and switches on the front panel. Zap anything that looks remotely poor. Well done on the fix. £300 for a pre amp transformer is ludicrous. Even an SVT transformer for Tube Amp Doctor is only about £220. Someone's taking the p#ss.
[/quote]
I've been over the power board and reflowed all the solder joints once already It was a tidy job to start with, but I wanted to remove it from the equation.
I'll give the preamp board it a going over next time I've got it open - I've checked it with a mangnifier, but maybe some reflows might be order there too. Good advice, thanks.
I'm still waiting for another quote for rewinding the transformer, I hope it's cheaper too - I just wish there was space in the case to move it off the power board. It [i]should[/i] have been chassis-mounted in the first place, not held on to the board by solder and ziplock tags !