i’ve recently got hold of a lovely SWR Spellbinder Blue combo (valve preamp, 160w class d power amp) which seems to be in pretty good nick. It does however “tick”, well, more of a soft pop every few seconds when cold, with the frequency slowing down over time. Each time there’s a tick the mute LED beneath the master flashes on then off. Audible both through the speaker and through headphones, so I’m guessing more likely to be a preamp issue.
Apart from calling the bomb squad, anyone any thoughts as to what may be happening? Getting the amp serviced would be a good start but struggling to find anywhere that deals with both valve and digital amps in the Bath area.
pic enclosed for gear porners...