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Joined:
August 2002
Posts: 6
Location: UK | I'm having problems with the preamp on my 1984 Balladeer, does anyone have a wiring diagram or can advise? |
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February 2002
Posts: 5750
Location: Scotland | What kind of problems? |
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August 2002
Posts: 6
Location: UK | No Audio output |
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Joined:
February 2002
Posts: 5750
Location: Scotland | It's probably not a serious pre-amp problem. Presuming that the battery is in good condition the most common causes of intermittent or no output is the output jack not switching the battery on when a plug is inserted, or poor connections at the battery terminals. Change the jack to a Switchcraft or similar, any stereo jack will do the job. Also check that the sub-mini jack from the pickup to the pre is connected.
Paul |
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August 2002
Posts: 6
Location: UK | Hi Paul,
I'm a total layman when it comes to electronics,what do you mean by "check the sub-mini jack from the pickup to the pre is connected" if you mean is the little jack plugged in, yes it is,
cheers,
Graeme |
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February 2002
Posts: 5750
Location: Scotland | Try plugging or unplugging a cable while the other end is plugged into an amp, (keep the volume low!!!!) you should hear a pop as the battery switches on & off, if you don't it's most likely that the switch on the jack is faulty.
Paul |
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August 2002
Posts: 6
Location: UK | Paul,
I tried that and yes I get a pop as it switches on. This pre amp with it being a 1984 is not an EQ it only has a rotary Pot for volume and I think this could be the problem, It is very noisey when turned but still no audio from the pickup? Is there any way to test the pickup?Someone I work with is excellent with electronics so I was hoping to find a wiring diagram to assist him in curing my problem. |
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February 2002
Posts: 5750
Location: Scotland | Check the battery condition, the pres don't work properly once the voltage drops below around 6V. A squirt of electronic lubricant on the pot should cure the noise. Have your tech wire the pickup directly to an input & see if you get a signal, if you don't it's a pickup problem, if the pickup is working ask the the JHS (UK distributor) or the factory to send you a schematic for the preamp. I may have a working pre of this type available in a couple of weeks. JHS can supply replacement pre-amps if neccesary.
Paul |
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Joined:
August 2002
Posts: 6
Location: UK | Hi Paul,
The battery is brand new, my techy mate has tested the pickup and thats OK so it looks like a problem with the pre amp. He is going to replace the JFET tomorrow once I get one from RS, it would obviously be easier for him if he had a diagram, I'll keep you posted, Cheers |
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Joined:
June 2002
Posts: 136
Location: Parkersburg, WV | Dear Bowz,
I may be able to help with the diagram. I linked an attachment to your listed e-mail address on your website.
Hope it helps.
Patsbro |
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August 2002
Posts: 6
Location: UK | Yipeeeeee its working again, many thanks Paul for your advice and Patsbro for the diagram, my friend discovered that it was a simple case that the ground wire on the input jack was detached, he re terminated the wires and everything is now OK, once again thanks for the help |
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February 2002
Posts: 5750
Location: Scotland | I hate to say I told you so, but it's ALWAYS the f*****g jack socket!!!!!!!! Glad it's working again, enjoy, and don't be a stranger.
Paul |
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May 2002
Posts: 3005
Location: Las Cruces, NM | Who was that masked man, Hi Yo Silver Solder awaaay. Paul, another pesky bad guy apprehended.
You're a treasure to this board. |
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Balladeer Wiring diagram
