Dada Electronics Antwerp is closed from Thursday 17 to Sunday 19 May..
All the High-end boards for Quad 303 and 405 are available again as well as the High-end revisio..
See http://www.dadaelectronics.eu/shop/quad-second-hand-parts/quad-chassis..
koozoop
Posts: 5 |
Hello. I have successfully upgraded my Quad 33 with the Dada kit and everything works fine, apart from the balance pot (I will probably de-solder it) and a constant hum coming from the right channel. I switched the amplifier boards (I use Radio 1 and 2) but the hum is still present on the right channel. Where shall I look next? |
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Stefaan
Posts: 598 |
Hello, If the hum was not there before the revision it is probably due to a soldering-problem. I would check all the soldering-joints of the new components with a magnifying glass and / or a multimeter |
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koozoop
Posts: 5 |
Thank you for your response. I will check all joints. |
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EJP
Posts: 1605 |
Swap the two amplifier boards. If the problem moves it is in one of them. If it doesn't, it is in the Tape Adapter board. |
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koozoop
Posts: 5 |
Done! Both a bad interconnect cable and a cold solder on the tape board were the reasons for the hum. Everything ok. Got a question about the balance pot though: in case I want to reinstall it, do I just measure the resistance across the legs and turn the shaft to the middle (eg 0.5kΩ) ? |
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