Philips Philetta 204U (Techniek Radio/TV)

door Kurt @, 22.03.2023, 14:10 (400 dagen geleden)

Hello :-)
This is my first post.
I have an Philips 204U since a couple of month.
The "problem" capacitors Philips teer-capacitors and Wima tropydur are replaced.
Radio is working, but not properly.
Hear some station on MW but none on SW.
I am suspicious of the trimmer capacitors C14,C18 and C38.
Have anybody out there some information to read about this capacitors?
There is a procedure in the manual......
Have search on your forum, but can not find anything about these capacitors.
In my radio there is free ends of the wire arond each cheramic rod.
Are they replacible with mica-capacitors 32pF?
Thankful for ALL information of these, for me unknown capacitors.
Greetings Kurt

Philips Philetta 204U

door Ben ⌂ @, Waddinxveen, 22.03.2023, 15:42 (400 dagen geleden) @ Kurt

Kurt,they are not replaceable with mica-capacitors 32pf.
The simple procedure, with the variable C on a transmitter roughly in the middle.
For the MG temporarily replace C18 for a 30pf toll trimmer and adjust to maximum.
Then measure the capacity and then reset the string trimmer to the same capacity.
For the KG it is C14 in the same way.
Good luck, Ben

[image]

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Een helikopter overzicht heeft pas zin als je niet te hoog vliegt.

Philips Philetta 204U

door Kurt @, 22.03.2023, 18:54 (400 dagen geleden) @ Ben

Thanks for your answer Ben!
I was not able to send a picture of the capacitors into my message earlier.
But you understood the capacitors I ment.
Saw the name "draadgewonden condensator" somewhere.
Do you happend to have some data sheeet of those cheramic capacitors?
I am eager to know a bit more of those Philips wire wound capacitors.
Have search a lot on internet, but never found any information.
By the way, this forum is priceless with all information to read in Tips & Trucs!
Kurt

Philips Philetta 204U

door Ben ⌂ @, Waddinxveen, 22.03.2023, 20:24 (400 dagen geleden) @ Kurt

Kurt, this item was earlier on this forum see https://www.nfor.nl/index.php?id=297985
Please do not use two hands on an working Philetta, its shocking dangerous.
(But I think you now that.)
Greetings, Ben

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Een helikopter overzicht heeft pas zin als je niet te hoog vliegt.

Philips Philetta 204U

door Kurt @, 22.03.2023, 22:30 (400 dagen geleden) @ Ben

Thanks a lot for the interesting link Ben!
Yes I am aware of the dangerous chassi.
Kurt

Philips Philetta 204U

door hans @, Hoorn, 22.03.2023, 21:38 (400 dagen geleden) @ Kurt

Saw the name "draadgewonden condensator" somewhere.

Kurt,

I happen to have these in stock [NOS!] for €1 each plus postage.

[image]

hans

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Philips Philetta 204U

door Kurt @, 23.03.2023, 11:09 (399 dagen geleden) @ hans

Hello Hans!
I appreciate all help I had from you and Ben.
Now I had good a good idea of those capacitors.
Kurt

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