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Philips 2511;2607 defekt?!?

Geschreven door Alex Testoni op 14. Aug 2006 20:55:44:

Hello.
>
> My name is Alex, from Italy;I'm a radio collector.
> Compliments for Your wonderful and precious Internet site.
> I've one suggest to ask You.
> I've two old wonderful Philips radios, recently bought on E-bay.
> One Ph. 2607 and one 2511 .
> Sorry, I'm not a radiotechnic.
> Both have a serious problem.
>
> When I turn on the radios, the rectifier tube 506k(Ph. 2511) or the DW4
> 350(Ph. 2607now broken!!) become hot and red in less than 15-20 seconds.
>
> On Ph.2607 I've broken the DW4 350 after 40sec.
> On 2511 I've had more care.
> The filaments of the other tubes, like the lamp, work.
> Power tube C443 seems switch off.
> I've seen the original 2511-b Philips scheme and I suspect that the
> condensers of the power pack C1-C2 are defective, so there is a
> desctructive current on the filaments that I haven't misured.
> The transformers are set, I think correctly, on 225V (2511) and 240V(2607).
> In Italy there's the 230V.
> It' seems possible?
> Are often, those old radios, defective in the power pack condensers?
>
> The data-sheet reports:
> condenser C1=6uF (tension in Volts? 400? I would ask You)
> condenser C2=4uF (tension in Volts? 400? I would ask You)
>
> Another question.
> Do You have any suggests about the treatment of the "arbolite-philite"
> on Philips radios 830; 930;2511;2607?
> Best whishes
> Alex





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