04-10-2016, 08:06 PM
I've retrieved the KB radio from upstairs. Valves present and correct except for the missing 1D5 HT rectifier. A Mullard CY1C will work in this position.
The set was made at the time Brimar valves were being introduced into KB radios. Evidently Brimar did not make a 0.2amp heater high slope output valve so a Mazda PEN3520 was used. The 15D1 frequency changer is an American 6A7 with a 0.2amp heater.
Geordie McBoyne.
The set was made at the time Brimar valves were being introduced into KB radios. Evidently Brimar did not make a 0.2amp heater high slope output valve so a Mazda PEN3520 was used. The 15D1 frequency changer is an American 6A7 with a 0.2amp heater.
Geordie McBoyne.
