philips: V6A (V 6 A)

Dear Radio friends! When restoring my Philips 6VA I found that the power smoothing capacitors didn't come up to the rates according to the schematics. Well, when I unsoldered the dropping resistor (R2, 2k Ohm) it was damaged and I'd to renew it. This resistor is a quite big one (in fact 3 R:s in paralell)) and is probably wire wounded. Doe’s this wire wounded resistor make any sense to the +B rail when considering the inductive reactance, or does it act like a choke too? Regards Lars-G.

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Dear Lars-G,

The inductance of the wire-wound resistors in that part of the power circuit has no significance.

Provided you do not seek to repair as an "original", you can replace with any combination of resistors in series or parallel to achieve the correct power rating and resistance.

Happy restoring!

Best regards,

Roy

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Dear Roy! Thank you for the advise. Proceeding now with the rest of the work. In this set there are "golden" tubes and I red somwhere that if this paint for some reason is removed the tube won't work satisfactory anymore. Is that rubbish or true? Regards Lars-G.

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Dear Lars
The "electro-magnetic shield" is most often necessary.  There are several techniques how to restore them but up to now we probably have only articles in German abolut that.

You can naturally also use a metallic "can" as it was done mainly in the US instead of a color coating with an electrical conductor in the color.

If we are lucky, somebody will post such an article like Rüdiger Walz has done in English ;-)
?

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