23-01-2020, 11:18 AM
Despite going over the 274A again, and resoldering suspect joints it is still intermittent, which is down to bad contacts between the valve and it's socket. Tinning one of the pins made little if any difference, so ideally a replacement valveholder is needed. The radio isn't mine, so I wonder if I can source and fit a replacement valveholder before 1st. February, when the owner is calling to collect it!
