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Chip Amps Amplifiers based on integrated circuits

sick amp please help
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Old 6th November 2011, 08:22 PM   #21
AndrewT is offline AndrewT  Scotland
Join Date: Jul 2004
Location: Scottish Borders
Your Maplin amp kit will have come with it's own build guide and spec sheet.
regards Andrew T.
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Old 6th September 2012, 09:47 PM   #22
nigelwright7557 is offline nigelwright7557  United Kingdom
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Join Date: Apr 2008
Location: Carlisle, England
Originally Posted by richa View Post
hi everyone,
i have built ("from kits") a pair of maplin 50 watt mono blocks with uprated power supplies,(individual to each channel,) and a pre amp, they are rather goood, these are kit amps and i merely followed the instructions but when it comes to troubleshooting i'm a bit lost. could anyone give any help on the indie repair, there is no point buying anything else as i'm sure it must be a simple repair, anyway thanks in advance for any help you can give,,
I have just bought a couple of Maplins 50 watt amps off ebay one working and one with some transistors missing.
The working one was oscillating a bit so I add 150pf to the VAS and it works great now.
I first built one of these in around 1980 for a disco but it wasnt really loud enough so I bought one of Maplins 225WRMS amplifiers and that was very loud.
PCBCAD51 download or CDROM 2019 version out now http://www.murtonpikesystems.co.uk
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