In that case they must be early diode rectifiers not selenium what shape and material is it made out of ?
The combined capacitor is bad news I had to replace every one due to leakage between them.
The tubes are standard British type B9A based I have them all in my spares box usually quite reliable
The combined capacitor is bad news I had to replace every one due to leakage between them.
The tubes are standard British type B9A based I have them all in my spares box usually quite reliable
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so can i replace the filter capacitor with something that has slightly more capacitance does the 20 percent rule count here.
Yes Fjellreven it can take the extra capacitance but not more than 50uf and make their working voltage at least 100Volts DC higher than the rectifier output voltage due to surge and make sure all three capacitors are separate NOT in the one can.
Thanks TG---If it is it is recommended that a surge protection resistor be fitted --not my words but the original manufacturers of selenium rectifiers backed up by electronic hardware engineers of the time.
If you check up that type needs a current limiter as without it its normal working life is shortened and/or efficiency is affected .
That would then mean you should not go much above the recommended reservoir / smoothing capacitor value.
I couldn't find that rectifier in my equivalents book.
If you check up that type needs a current limiter as without it its normal working life is shortened and/or efficiency is affected .
That would then mean you should not go much above the recommended reservoir / smoothing capacitor value.
I couldn't find that rectifier in my equivalents book.
yeah i think i will skip that resistor i might be wrong but i think that tandberg knew what they were doing back then it was one of the biggest radio manufacturers in Norway the only one who could compete with radionette.
Quote- "can one of them be a film capacitor " --of course it can but have you priced the cost of 32uf quality polypropylene capacitors at a WV of say 500Volts ?
And of course the SIZE !
And of course the SIZE !
C274AC25160AA0J PP metallisert filmkondensator for motordrift 16uF +-5 % KEMET
its not that expensive for a 16 uf film capacitor
its not that expensive for a 16 uf film capacitor
Yes under £4 sterling I don't speak Norwegian but the words have some German origin in them and I know a few German words as I watch German TV on satellite .
Those capacitors are cheap because they are meant for Electric motors so they are made out of very cheap packing grade polypropylene might be okay for a tube radio but NOT okay for anything hi-fi.
Those capacitors are cheap because they are meant for Electric motors so they are made out of very cheap packing grade polypropylene might be okay for a tube radio but NOT okay for anything hi-fi.
Is this hifi?
C4AQSBW5170A3MJ Kondensator, radial 17 uF +-5% KEMET | Elfa
From What i have heard i thought kemet made good capacitors.
C4AQSBW5170A3MJ Kondensator, radial 17 uF +-5% KEMET | Elfa
From What i have heard i thought kemet made good capacitors.
Thats better Fjellreven , notice its a smaller capacitance but dearer does that not tell you something ?
N101N it aint "hard to be sure " electric motor capacitors were never designed for hi-fi .
Maplin electronics --now dissolved sold them - cheap as chips I bought several in the ,80,s opened one up cheap internals .
Look JLH in a long article in EW around the early ,80,s on passive components said the same .
Sadly John is no longer with us but D.Self is --ask HIM if he would fit and use those motor capacitors in his cutting edge designs .
They generate distortion, can leak due to their thinness , tell me what pukka audio design engineer has fitted them to their designs ?
I havent come across any it would be embarrassing to do so unless it was just a test to -see if it works .
Dig out your $100000 spectrum analyzer run a minus 100db or more pure RMS 20Khz test signal through one of those capacitors and into the spectrum analyzer take a long hard look at the peaks and you wont question me again about it.
N101N it aint "hard to be sure " electric motor capacitors were never designed for hi-fi .
Maplin electronics --now dissolved sold them - cheap as chips I bought several in the ,80,s opened one up cheap internals .
Look JLH in a long article in EW around the early ,80,s on passive components said the same .
Sadly John is no longer with us but D.Self is --ask HIM if he would fit and use those motor capacitors in his cutting edge designs .
They generate distortion, can leak due to their thinness , tell me what pukka audio design engineer has fitted them to their designs ?
I havent come across any it would be embarrassing to do so unless it was just a test to -see if it works .
Dig out your $100000 spectrum analyzer run a minus 100db or more pure RMS 20Khz test signal through one of those capacitors and into the spectrum analyzer take a long hard look at the peaks and you wont question me again about it.