Thunder 1 A bass pick-ups

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Thunder 1 A bass pick-ups

Post by GabGaff on Sat Apr 21, 2018 10:47 am

Hi, 
One of the pick-ups on my Thunder 1 A bass is not working in passive mode, the other one seems fine. Any advice on what pick-up/model number to replace it with/search for on the internet? The guitar has a 1984 serial number. Is  "Hard Puncher I pickup"  a model type?
Thanks,
Gabriel
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Re: Thunder 1 A bass pick-ups

Post by Westbone on Sat Apr 21, 2018 2:43 pm

Does it work in active mode?
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Re: Thunder 1 A bass pick-ups

Post by GabGaff on Sun Apr 22, 2018 11:08 am

Well, it is a bit of an oddity. It kind of works in active mode when the volume pot is in a certain position, close to max volume, but otherwise the top two strings (E and A) are very loud and there is little noise from the D an G strings. I have tried changing the vol pot but same problem. That is why I said "not working in passive mode", as this possibly rules out the problem being with the active circuit. It may be a wiring problem, something not grounded somewhere, but I have checked the wires and they seem fine.
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Re: Thunder 1 A bass pick-ups

Post by Barry on Sun Apr 22, 2018 11:23 am

In case you have not seen this already, here are two wiring diagrams for the T-IA so you can double check the circuit:
LINK

And, at the risk of being Captain Obvious, have you also checked the batteries?

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Re: Thunder 1 A bass pick-ups

Post by Westbone on Sun Apr 22, 2018 3:55 pm

A squirt of switch cleaner. Good start.
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Re: Thunder 1 A bass pick-ups

Post by GabGaff on Sun Apr 22, 2018 6:05 pm

I may have fixed it. The wire from the active/passive switch to main volume was to the wrong connection, as was one of the pick-up cables. So hopefully it has sorted it now without the need for new pick-ups. Thanks for advice!
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Re: Thunder 1 A bass pick-ups

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