philips: V6A (V 6 A)

Hello Radio friends! Trying to restore my newly acquired Philips Matador II V6A but I can't find out how to tune the IF-filters because the trimmer capacitors (as they suppose to be according to the schematics) do not have any facilities for that. Attaching a pic of the second IF-filter with caps arrowed. The caps are tubular ceramics and are wire wouded as can be seen from the picture. Any suggestions would be appreciated. Kind Regards Lars-G.

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Hi Lars-G.

These caps are often seen / used in Philips electronics. When new, there was more of that wire wound around the ceramic body and then, during alignment, unwound (and cut) to the point of optimal alignment.

So - these are not really "trimmer capacitors" as you expected to find and they are only once "adjustable".

Kind regards, Walter

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Hi Walter! Thanks for your prompt reply. This is good to know and a little bit relieving because my signal generator doesn't even go down to the IF-frequency wich is 128 kHz. The receiver works but is weak, maybe I have to replace the tubes, each of them are original ones with the Philips banderole around them. They are 80 years old, unbelievable. Kind Regards Lars-G

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Hi Lars-G

If your tubes have the Philips-banderole they presumably really are the original ones!

If reception is very weak, check for proper working of the oscillator.

Did you already check / replace the paper caps and the electrolytics? Also resistors with more than 0,5 MOhm are prone for failure.

Let us know what you've already done/reached!

Kind regards, Walter

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