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ARCHIVED FORUM -- April 2007 to March 2012 READ ONLY FORUM
This is the first Archived Forum which was active between 17th April 2007 and
1st March February 2012
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Now, where do I buy a new capacitor like this ? The short answer is: I don't. I will have to empty the box of its old contents and fit new capacitors inside to preserve the original chassis look. This can be a huge task and is something I will normally only do if I can allocate time for it and usually only in special sets. I think this set deserves
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Good job on the potentiometers ! These wonderful receivers are worth keeping alive. Open inputs will often work as antennas. If the hum persists, even with a turntable and/or tape deck plugged in (respectively), the reason is, no doubt, the old capacitors. (A kit is available). The board mounted rectifier can also cause humming and/or operational glitches
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Welcome to Beoworld ! Not too often we talk about these decks. There are some mechanical points that are usually dry, most are related to the idler wheel carriers and/or brakes. There are also some felt pads under the reel tables that work lose, they are normally glued to their bronze leaf springs. The belts are fairly critical too and I hardly think
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Sometimes a microscope and/or strong light is needed to spot the fault. The tracks on this type of board have a sad tendency to develop cracks where a copper trace meets a solder pad, right at the edge of the solder cone, almost impossible to spot. Martin
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Could be as simple as a broken PCB track or a cracked solder joint, that would not be the first time for this type of board. Let me get this right; The two buttons (+ and -) has no effect and/or does not change the digits shown on the display ? Martin
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Did you replace ALL the caps in the kit ? Is the wow related to the revolution of the platter, as in one burst for every revolution ? Martin
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And a closer look from the side. Note that it says "Dry electrolytic..." which actually is a contradiction. Note also that the capacitor sits on a dark piece of fiber material to add insulation between the capacitor and the grounded chassis. Martin
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Capacitors, capacitors - always capacitors... I spend many hours of my life replacing capacitors, I've replaced thousands and this set will definitely add a good handful or two to that count. The first ones that normally spring to mind are the filter and reservoir capacitors. These are high voltage components, very often found leaky and a faulty
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Old and new. For this set, I chose to use some of the best capacitors available. The LCR polypropylene capacitors are a bit expensive but they are very reliable and will practically last forever. They come in a very suitable voltage range for valve sets and they are axial (one lead out each end) so they will make "tidy" repairs when replacing
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Yes, this one has definitely passed its sell-by date. Components like this makes visual fault-finding easy. Martin
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