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4th Jul 2020, 7:43 am
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#1 |
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Diode
Join Date: Apr 2020
Location: Newcastle upon Tyne, Tyne and Wear, UK.
Posts: 5
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Beolit 400
Hi all just bought a beolit 400 off eBay (parts only) mainly for the speaker luckily the speaker in a good one, thought I would try putting batteries in and seeing what was wrong with it and the only thing I can find is that the volume is very low with the slider at max
Anyone suggest anything ? |
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4th Jul 2020, 9:52 am
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#2 |
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Dekatron
Join Date: Feb 2009
Location: Chesterfield, Derbyshire, UK.
Posts: 3,766
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Re: Beolit 400
Is it just low or low and distorted. Mick.
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4th Jul 2020, 11:00 am
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#3 |
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Heptode
Join Date: Oct 2008
Location: Aalborg, Denmark
Posts: 903
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Re: Beolit 400
Some of the Beolit-400's used BC159 & BC148B Lock-fit transistors in the LF-section, transistors TR6 and TR7.
That could present a problem as is well-known. Check the DC voltages given in the schematic diagram attached. Any voltage off could obviously indicate that something is wrong in that stage. Also consider that electrolytic capacitors deteriorate over years. I would check capacitors #46 and #59. Rgds, /Torben |
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4th Jul 2020, 3:02 pm
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#4 | |
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Diode
Join Date: Apr 2020
Location: Newcastle upon Tyne, Tyne and Wear, UK.
Posts: 5
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Re: Beolit 400
Quote:
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