... coming from my 75 model T. I noticed a "click" sound whilst playing through it one day, didnt notice a volume decrease or tone change.. then today when i fired it up it did it again a couple times.. it sounds like it's coming from near the pilot light/transformer. the tubes are still glowing, and i havent noticed anything faulty. is it worth taking to a tech or is it probably something that just comes with the age? It doesn't happen often btw