I am in the process of recapping a Blaupunkt Verona. After changing the capacitors, I had just one left to go, at least I thought it was a cap.

Looking closer I noticed that it was a silver tube covered with plastic like the capacitors, but had much thinner leads and the label read "RUWEL" with the number "8200/5" just below that. It was rated for 600v.

All the other capacitors had a clear mark as to what they were in mf. This is different. I have not removed it yet as I can't ID it on the schematic I have.

Does anyone know what it is?

Thanks,
Steve

Yes, that is a capacitor 8.2 PF or .0082 MF It's a fine capacitor made by Fritz.

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: : : : : : : :Sir Steve Beeeee . . . . . : : : : :C'mon . . . pick a capacitor . . . . any capacitor . . : : : : : :Methinks that what you have found yourself there, is a polystyrene capacitor, and would have expected your having found other units in that unit, however, the other manufacturers choice of outer covering might not have been in that clear shell. :Their choice . . . . the requirement of needing a stable capacitor being used in that particular caps circuit function, but not taking the price bump up of the use of a silver mica cap, at that higher capacitance level. : : :I would highly lean towards that unit being used as part of a a tuned element / filter or audio function, and, in not consulting the schematic, if the :unit has a FM de mpx circuit, that cap might be shunting an inductor and being its resonating companion. : : :The other thought, of it being an element of an audio tone control circuit. : : :I am suspecting, also without seeing the physical size of the unit, and also am interpreting the units marking as being an :8200 pf or .0082 ufd unit at a 5% tolerance rating and you know the 600 . .usually 630 VDC . . .rating of the unit. ADDENDA: : :AND . . if you are going through a "shotgunning" replacement of capacitors in the unit, that might be one that I would deem appropriate to have left in place. The worst that I usually see is someone in the past having used, or adjunct subjecting, an inappropriate and agressive cleaning solvent onto its casing. It can then react by its crazing and the creation of micro fissures and straitions developing on the over coating. Some chemicals even create a "whiteout" or blushing of the outer plastic covering. The latter situation, particularly a side effect of exposure to carbon tetrachloride or some of the the trichlorethylene / perchlorethylene family of cleansing agents. :73's de Edd : : : :

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So I should replace with a silver mica or a polystyrene? I'll look for one now.

Thanks for your help. The other caps were clearly marked and this is my second radio of this type, the first not having this issue, so I am still a novice.

This cap is in a circuit that had inductors and I believe in the tuning section based on my other experience and recapp of the earlier radio. This schematic is not very clear. It is a Blaupunkt Verona Type 20103.

Thanks for your help!
Steve

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:: :: :: :: :: :: :: ::Sir Steve Beeeee . . . . . :: :: :: :: ::C'mon . . . pick a capacitor . . . . any capacitor . . :: :: :: :: :: ::Methinks that what you have found yourself there, is a polystyrene capacitor, and would have expected your having found other units in that unit, however, the other manufacturers choice of outer covering might not have been in that clear shell. ::Their choice . . . . the requirement of needing a stable capacitor being used in that particular caps circuit function, but not taking the price bump up of the use of a silver mica cap, at that higher capacitance level. :: :: ::I would highly lean towards that unit being used as part of a a tuned element / filter or audio function, and, in not consulting the schematic, if the ::unit has a FM de mpx circuit, that cap might be shunting an inductor and being its resonating companion. :: :: ::The other thought, of it being an element of an audio tone control circuit. :: :: ::I am suspecting, also without seeing the physical size of the unit, and also am interpreting the units marking as being an ::8200 pf or .0082 ufd unit at a 5% tolerance rating and you know the 600 . .usually 630 VDC . . .rating of the unit. : : :ADDENDA: : : :: ::AND . . :if you are going through a "shotgunning" replacement of capacitors in the unit, that might be one that I would deem appropriate to have left in place. : : :The worst that I usually see is someone in the past having used, or adjunct subjecting, an inappropriate and agressive cleaning solvent onto its casing. : : :It can then react by its crazing and the creation of micro fissures and straitions developing on the over coating. Some chemicals even create a "whiteout" or blushing of the outer plastic covering. : : :The latter situation, particularly a side effect of exposure to carbon tetrachloride or some of the the trichlorethylene / perchlorethylene family of cleansing agents. : ::73's de Edd :: :: :: ::

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Or should I leave it alone? I was shotguninng and replacing all of them before I got to this one. The others were typical and not in tuned circuits as far as I can tell. There is another similar one in the same PC board with the inductors. No cleaner was used on the radio, just a light vacuum.

:So I should replace with a silver mica or a polystyrene? I'll look for one now.
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:Thanks for your help. The other caps were clearly marked and this is my second radio of this type, the first not having this issue, so I am still a novice.
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:This cap is in a circuit that had inductors and I believe in the tuning section based on my other experience and recapp of the earlier radio. This schematic is not very clear. It is a Blaupunkt Verona Type 20103.
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:Thanks for your help!
:Steve
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::: ::: ::: ::: ::: ::: ::: :::Sir Steve Beeeee . . . . . ::: ::: ::: ::: :::C'mon . . . pick a capacitor . . . . any capacitor . . ::: ::: ::: ::: ::: :::Methinks that what you have found yourself there, is a polystyrene capacitor, and would have expected your having found other units in that unit, however, the other manufacturers choice of outer covering might not have been in that clear shell. :::Their choice . . . . the requirement of needing a stable capacitor being used in that particular caps circuit function, but not taking the price bump up of the use of a silver mica cap, at that higher capacitance level. ::: ::: :::I would highly lean towards that unit being used as part of a a tuned element / filter or audio function, and, in not consulting the schematic, if the :::unit has a FM de mpx circuit, that cap might be shunting an inductor and being its resonating companion. ::: ::: :::The other thought, of it being an element of an audio tone control circuit. ::: ::: :::I am suspecting, also without seeing the physical size of the unit, and also am interpreting the units marking as being an :::8200 pf or .0082 ufd unit at a 5% tolerance rating and you know the 600 . .usually 630 VDC . . .rating of the unit. :: :: ::ADDENDA: :: :: ::: :::AND . . ::if you are going through a "shotgunning" replacement of capacitors in the unit, that might be one that I would deem appropriate to have left in place. :: :: ::The worst that I usually see is someone in the past having used, or adjunct subjecting, an inappropriate and agressive cleaning solvent onto its casing. :: :: ::It can then react by its crazing and the creation of micro fissures and straitions developing on the over coating. Some chemicals even create a "whiteout" or blushing of the outer plastic covering. :: :: ::The latter situation, particularly a side effect of exposure to carbon tetrachloride or some of the the trichlorethylene / perchlorethylene family of cleansing agents. :: :::73's de Edd ::: ::: ::: :::

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I would leave those capacitors alone. The set was tuned, and aligned with those in place.

If all of the other capacitors you replaced were like those Edd posted, I'd leave those alone, too. I've only delt with a couple of Blaupunkt radios, automobile, of 50s vintage, and in those radios all of the capacitors were metalized film except for one or two in the power section. ...And one of those paper caps did blow after quite a period of operation. The metalized film caps will likely last forever, though.

T.

Ok. I assume I still replace the small electrolytics in the PC board though. Is that correct? They are 1 and 2 mfd. However I don't need to replace them with more electrolytics I assume?

What I did replace in capacitors already, I replaced with orange drop types. They were not on tuned circuits as far as I can tell.

On the last Blaupunkt I finished I did the same and it plays very well. It did need an alignment though after the work I did. I use it every day. Hope these last.

:If all of the other capacitors you replaced were like those Edd posted, I'd leave those alone, too. I've only delt with a couple of Blaupunkt radios, automobile, of 50s vintage, and in those radios all of the capacitors were metalized film except for one or two in the power section. ...And one of those paper caps did blow after quite a period of operation. The metalized film caps will likely last forever, though.
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:T.
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