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-   -   Replacement capacitor (https://www.vintage-radio.net/forum/showthread.php?t=148564)

Northyorks1 1st Aug 2018 11:36 am

Replacement capacitor
 
1 Attachment(s)
Hello, Can anyone please advise on a replacement capacitor. Pictured below it is a 50pf 1000v taken from a Telefunken Jubilate S export. Also does anyone know where I can get a service sheet for this model.

Thanks Ian

ms660 1st Aug 2018 12:03 pm

Re: Replacement capacitor
 
If it's the mains antenna one then personally I would leave it out of circuit but if you were to insist then a 50pF in series with a Y Class perhaps?

Not sure about an export one but supposedly the "Jubilate S" schematic is here if that's any help:

https://nvhrbiblio.nl/schema/Telefunken_Jubilate55.pdf

Lawrence.

boxdoctor 1st Aug 2018 12:04 pm

Re: Replacement capacitor
 
You will find your model here, I think. http://www.opweb.de/en/index.php
There seems to be several versions. If you do a site search, several come up.
Regards, tony.

Northyorks1 1st Aug 2018 2:48 pm

Re: Replacement capacitor
 
2 Attachment(s)
Thanks for your help Lawrence and Tony. Jubilate s was on site you recommended Lawrence but would not download. As for capacitor I am not sure which one it is, but is connected between base of volume switch then to a tag with a fuse on it. Sorry for limited knowledge as I am very new to this and a novice. Ok mechanically but no electrical experience, so just thumbling through at the moment. Pics below of capacitor connections.

Ian

Station X 1st Aug 2018 3:19 pm

Re: Replacement capacitor
 
Why did you decide to change this capacitor?

ms660 1st Aug 2018 3:37 pm

Re: Replacement capacitor
 
I've just tried the link I posted earlier, it downloads ok for me.

Looked at various Jubilate schematics, can't find any with a 50pf capacitor connected according to your description, the only one that connects to the on/off switch I can find is the 50pF that connects between the non-fused side of the on/off switch (the voltage selector side of the switch) and the VHF antenna panel via a red wire so far as I can make out.

I think maybe the fuse tag you identified in the photo as the tag the 50pF was connected to is only connected to a white wire that goes to the mains transformer, can you confirm?

Lawrence.

ms660 1st Aug 2018 4:54 pm

Re: Replacement capacitor
 
1 Attachment(s)
Annotated thumbnail picture ('scuse scrawl) of a scanned copy schematic from the link posted earlier showing the capacitor I was on about, the metal tag that's highlighted can be swung either way to make contact with either of the vhf antenna dipole sockets.

Lawrence.

Northyorks1 1st Aug 2018 5:00 pm

Re: Replacement capacitor
 
4 Attachment(s)
I removed capacitor as it was crumbling on the ends, so thought it best to remove. Right decision I dont know. Regarding wires Lawrence I have added more photos to try and make it clearer, to me more than you I think.

Photo 1 The black wire for capacitor, which also has a red wire which you mentioned connected to the same tag and runs to the antenna panel shown in photo 2. Also the white wire you mentioned which is on the first tag and runs to the mains transformer shown in photo 3. And a yellow wire on tag 3 which is the coiled wire in photo 4. Hope this helps. Got work to do so wont be back online for a few hours.

G8HQP Dave 2nd Aug 2018 10:55 am

Re: Replacement capacitor
 
Is that capacitor enabling the mains lead to act as a VHF antenna?

ms660 2nd Aug 2018 11:14 am

Re: Replacement capacitor
 
Netzantenne.

Lawrence.


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