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Re: Problemen Philips 830 bij collega... zie tekst svp
Geschreven door John Hupse op 29. Dec 2004 16:19:52:
In reactie op: Problemen Philips 830 bij collega... zie tekst svp geschreven door Ramon Pool op 29. Dec 2004 12:48:43:
Hello Hans,
The S15 coil (smoorspoel) provides the anode current for the C453 output tube. So a broken S15 coil will silence your radio set. Furthermore it is possible that the C453 breaks down, as the 2nd grid of the tube will draw too much current in this situation and may run too hot.
You have 3 options, first option is to repair the coil.
Second option is to replace the coil by a new one, almost any small output transformer designed for a single tube output stage will do the job. You should only connect the primairy coil, do not connect the terminals of the secondary coil of the transformer. The resistance value is not that important, it is only given by Philips for reference purposes. Suitable values are in the 250 to 1000 ohm range.
Third option is to replace the coil by an original Philips part. Of course it is not that easy to find one.
Good luck,
John(bericht is ook gemaild)
>>>Hello!
In the beginning of this year we talk over internet about radio restoring i work on a Philips 930 and this radio is now in perfect condition.
I couple a weeks ago I start to restore a Philips 830, the cabinett is in very good condition, but the radio is silence.
I check and change some valves but is still silence, after some time If ound that the Coil S15 (smoorspoel) is broken.
This coil going from the Anode on B4 to the speaker.
Do you now how important this coil is, I read in the service manual that the coil has a resistans of 925-1135ohm.
Do you have some of this? Or do you now anybody else how has this.
Is it possible to replace this with annother type of coil?
Kindly regards