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| Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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13th Sep 2014, 7:47 pm
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#1 |
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Pentode
Join Date: Mar 2013
Location: Norfolk, UK.
Posts: 248
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Capacitor replacement info.
Please could some tell me the modern equivalent for the following. Pic one is used on a motor and seems to create a hiss via the amp, take the motor off, no hiss.
Pic 2 and 3 (circuit diagram) is for a Kolster Brandes TRP21 "Gaytime" Transistor Record Player. Any help would be great. John. |
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13th Sep 2014, 8:42 pm
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#2 |
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Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,289
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Re: Capacitor replacement info.
Those red, yellow and black Plessey electrolytics are always suspect. Replace with a 100uF electrolytic of 12V or more. The other cap looks like a Mullard mustard and there'll be nothing wrong with it. If you really must replace it use a 0.01uF or 10nF yellow polypropylene of 125V or more..
__________________
Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
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13th Sep 2014, 9:43 pm
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#3 |
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Pentode
Join Date: Mar 2013
Location: Norfolk, UK.
Posts: 248
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Re: Capacitor replacement info.
thanks for youre reply,
the 0.01uF 125v i persumed is failing as the tone when adjusted just seems to increase in volume and not much tone difference |
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13th Sep 2014, 11:20 pm
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#4 |
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Rest in Peace
Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
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Re: Capacitor replacement info.
In which case, I would suspect R3 and C1- especially R3 - rather than that 0.01 uF capacitor. But the degree of tone change that you become aware of is highly dependent on the speaker(s) you're using and also the frequency response of your ears!
Al. Last edited by Skywave; 13th Sep 2014 at 11:25 pm. Reason: Spelling corrections. |
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