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Cambridge Audio A3i repairs and mods
Cambridge Audio A3i repairs and mods
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Old Today, 05:47 PM   #281
spandrel is offline spandrel  United Kingdom
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Join Date: Oct 2016
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Cheers anatech. My meter does have Hfe but it's broke. I searched for GFA-565 and nothing comes up. Searching for Adcom brings up dozens. Can you remember when about you posted it?
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Old Today, 05:57 PM   #282
spandrel is offline spandrel  United Kingdom
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Join Date: Oct 2016
Location: Yorkshire
Is it the Beta matcher by cogeniac (scott andrews)?
Matching transistors & measuring the results
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Old Today, 06:35 PM   #283
OXAUDIO is online now OXAUDIO  United Kingdom
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Join Date: Sep 2006
Thanks for that long explanation, anatech. I'll bear in mid your advice re; a matched pair of input transistors, but in the meantime whilst in my workshop this afternoon, I 'soak tested' the A3i for around 3 hours continuously, playing 3 CDs in succession, with no sign of any problems, and very good quality sound. I'll repeat the tests tomorrow, then check the DC offsets again.
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