Nederlands Forum over Oude Radio“s

Onafhankelijk medium voor liefhebbers en verzamelaars van oude radio“s en gerelateerde zaken (zoals oude TV“s, versterkers, meetapparatuur). Hier kunt u discussiėren en chatten over uw hobby. Voorbeelden zijn: identificatie of datering van oude toestellen, vragen over documentatie, hulp bij reparaties en restauraties. De voertaal op dit forum is Nederlands, maar bijdragen in andere talen zijn ook welkom.

Blue flash in an AX50

Geschreven door Thierry Magis om 22. Apr 2001 20:52:46:

Hello !

A friend has give to me a lot of very old Philips amplifiers type 2844 , EL6420 , EL6435(searching diagrams of this model!). Some are in good condition , others quasi-totally destroyed . I try to repair all , i like their sound ...
I've got a problem with an EL6420 : one of the two AX 50 "flash" when there is high power output. The blue light is very impressive - but i don't like it too much ! When i invert the two valves of the voltage multiplicator , the problem stays in the same valve. I first think at problem with the smoothing capacitors , but they seems to be OK ... Is this flashing normal? Does it increase with the age of the tube? I know the AX50 are gas-filled , is there a loss of this properties?

Thank you very much !

Greetings
Thierry




Reacties / Answers:


Terug naar Nederlands Forum over Oude Radio“s