RichardH
Bodging pleb
A good few years ago, I built a power supply with a heap of Avondale TPRs, with individual 24v supplies then going to a heavily modified 32.5 - one TPR per section - so each phono board gets its own supply, as do the gain boards and the rest.
One of the channels was playing up, so I went poking around. Found the channel was supplying 27V, tried to adjust the trimpot and now it won't do anything but supply 32V. So is this likely to be the trimpot that has gone kaput?
For the moment I have pulled it out of use and doubled up the feed to the offending section. To add insult to injury, it turns out to be a dodgy connection on the cable in to the 32.5, not the TPR at all that was causing the problem.
Which leads me to the next question - would I be better off squeezing all (or at least some) of the TPRs in the 32.5, and just running a couple of 32V feeds to the TPRs in to the preamp, and splitting it out from there? I've not worked out if they'll fit, mind....
...or should I be looking to try out some of the more recent TPRs instead?
One of the channels was playing up, so I went poking around. Found the channel was supplying 27V, tried to adjust the trimpot and now it won't do anything but supply 32V. So is this likely to be the trimpot that has gone kaput?
For the moment I have pulled it out of use and doubled up the feed to the offending section. To add insult to injury, it turns out to be a dodgy connection on the cable in to the 32.5, not the TPR at all that was causing the problem.
Which leads me to the next question - would I be better off squeezing all (or at least some) of the TPRs in the 32.5, and just running a couple of 32V feeds to the TPRs in to the preamp, and splitting it out from there? I've not worked out if they'll fit, mind....
...or should I be looking to try out some of the more recent TPRs instead?
