Marshall amp Salvage! TSL100 to JCM800 2203 conversion part 2

Part2 of salvaging a dead Marshall TSL100 turning it into a 2203. Here I do all internal construction and wiring of hand built circuitboards and initial testing. Disaster strikes at the end as I realize the power transformer was dead all along.

[@seraphin_creates]

Ahahah the ending, ouf!! I feel with you but a less than great outcome for you can be great learning for us ;)

[@jutukka]

My advice is to use two resistors to "virtual" ground that heater winding because those resistors can act as fuses in certain tube shorting etc. situations.
And I have in my own builds tried not to hide wiring or resistors under turretboard because even if it looks messy, it is usually much easier to service, mod and troubleshoot.

[@jothanankrogh]

@jutukka thank you, everything you mention here gets addressed in the upcoming part3 video.

[@jutukka]

@@jothanankrogh Nice.
And about those heater resistors, for example if in EL34 tube socket the pin 3 (plate) arcs to pin 2 (heater), which is unfortunately quite a common scenario when tube socket is dirty or moist, or if B+ gets in some other way shorted to heater wiring which directly galvanically shares the same ground than B+ through chassis, if heater winding is centertapped and ct is directly connected to chassis, there could be some considerable damage as a result. In case of those virtual ground resistors, the to heater circuit shorted B+ current have to go to ground through those resistors which if are of properly low wattage flameproof mox resistors, hopefully act as a safe fuses in that situation.