938A, Philips; Eindhoven Radio (Techniek Radio/TV)

door Robert Gribnau, 05.06.2021, 09:40 (1273 dagen geleden) @ gspencer691
Bewerkt door Robert Gribnau, 05.06.2021, 10:33

If for whatever reason you do not aquire the output transformer that Hans offered you, maybe the following is usefull.

On "Vintage Radio Web", the site you got your information/screenshots from, it says that the loudspeaker in the Philips 938A is the 2161.

On "John's Radio Web" it says that the impedance of this loudspeaker is 7.5 Ohm and the impedance of the primary of the outputtransformer is 10000 Ohm (= 10K Ohm).

So since the output power of the Philips 938A is modest, about any outputtransformer with a primary impedance of 10K Ohm and a secondary impedance of 8 Ohm will do.

Greetings,
Robert

Edit: The output transformer has to a "single ended" one, so not a"push-pull" one.