CHAMP ELECTRONICS -" THE VINTAGE VALVE AMP HOSPITAL"

NOTTINGHAM, ENGLAND

SERVICING A CARLSBRO 100 WATT / 7 CHANNEL PA MIXER AMPLIFIER







There are two versions of this amp. Although both the same, the earlier version has a polished aluminium front panel and is about 40mm taller. (Please see the next article on two versions of the 200/7 PA amp). This is the slightly later version with a brushed-aluminium front panel.






I sourced this one for my Australian friend Mervin (Doctor Valve) and as I had it shipped straight to him from the UK, it never actually landed in my workshop. Mervin kindly took all the photos for me...for this website.





As I have said before......PA amps always sound bloody great for bass guitar and keyboards, with just a few small tweaks needed if used with six string guitar!

















Good old Partridge transformers.....as always!





Mervin tells me that nothing whatsoever needed doing to this amp, bar one silly issue. If you look at the seven input jack sockets, you can see simply a 1meg resistor across each one of them. However the very left....number one input socket had a 150 ohm resistor across it........making the gain virtually zero! Mervin said it looked untouched and original. As the colours of a 150 ohm resistor are similar to a 1meg, it could well have been the case that one of the production line girls may have picked-up the wrong resistor......and it may have been that way from new!





Brilliant example of a real good amp!







 

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