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My active circuitry has broken!

Discussion in 'Basses [BG]' started by Tom Crofts, Jul 9, 2003.


  1. Tom Crofts

    Tom Crofts

    Mar 15, 2001
    I have a De Armond Pilot Deluxe 5. I used an adaptor because my 9v battery was running low, it was set to 9v and had the adaptor plug for a 9v battery connection, when i plugged it in it made a loud buzzing sound and doesnt work anymore :| Any idea whether it is possible to get a replacement system, what with De Armond not existing any more? If not, which would be a reasonable quality, easy to fit replacement for not much money? It is a 3 band EQ and i've tested all the pots and every single wire and nothing seems to be amiss with those so I assume it's the circuit board itself... :S
     
  2. Tom Crofts

    Tom Crofts

    Mar 15, 2001
    No one has any idea about replacement systems or anything? I took it to a local electrical repair place and they've identified 2 diodes which have blown and the bloke has looked on the internet and in all their catalogues but cant find those particular ones... So he said he'll try ones that seem most likely and is charging me a tenner for it... No one has the tech spec or a wiring diagram type thing for the PCB? Or knows where I can get one? :\
     
  3. Trevorus

    Trevorus

    Oct 18, 2002
    Urbana, IL
    www.mrgearhead.net

    They would be the most likely source. You might also try a different preamp. You could probably get an Aguilar OBP-1 relatively cheap. By the way, you put too much current through your preamp. The voltage may be fine, but the adapters just put out too much current for a small circuit like that. Good luck!
     
  4. xyllion

    xyllion Commercial User

    Jan 14, 2003
    San Jose, CA, USA
    Owner, Looperlative Audio Products
    The amount of current drawn from any power source will be determined by the circuit being driven and not the power source. If both the battery and the adapter both put out 9V, then the preamp would draw the same amount of current from both.

    On the other hand, those adapters rarely put out what they claim to put out. I have measured them with a voltmeter before and they usually put out a few volts more than they claim.

    Also, if you wired the adapter backwards, that could easily explain the damage to the circuit.
     
  5. Trevorus

    Trevorus

    Oct 18, 2002
    Urbana, IL
    you might have had your adaptors polarity switched.
     
  6. Paul A

    Paul A

    Dec 13, 1999
    Hertfordshire U.K!
    Tom,
    I've P.M'd you.
     
  7. Tom Crofts

    Tom Crofts

    Mar 15, 2001
    Yeah, I think it was the polarity :( Ah well, my local electronics man didn't manage to fix it, so its off to Bass Centre for me, and if they can't do it then Paul A may be able to sort it out...
     
  8. Next time you'll just be getting another battery instead of frying the bass right? ;)

    Hope all goes well.
     
  9. Tom Crofts

    Tom Crofts

    Mar 15, 2001
    Bass Centre fixed it! He took one of the diodes off cos he thought it might have been put in backwards by my electronics bloke, when he took it out it crackled but worked he thought it might need a smoothing capacitor instead, took the other one out and it works perfectly :D

    So it seems that that bit of the circuit was soem kind of protective thing to stop everything else getting ruined... Still, he charged me a tenner just to take out a couple of diodes...

    Saved me £110 though... :D
     
  10. hey dude, did you look at anything they had on sale in the bass centre, and did they have anything amazing, havent been into london for about a month. Actually do they still have certain yamaha 2nd hand fretless still, i hope so. and yeah tell me your not from hatfield ok, cheers
     
  11. Tom Crofts

    Tom Crofts

    Mar 15, 2001
    I had a quick look around, I didn't see any second hand yamaha fretlesses, I did see a nice new one, bit boring looking but im sure it played nicely... My mate was searching for a fretless for around £315 or less, so after having a quick look in there we went over to Denmark St. for a look about, nothing there either... All either proper crap ones or they're about £2000 :S It was the same at the london guitar show, only 2 or 3 fretless basses in the entire thing... Not so great :( Ah well...

    I'm not in Hatfield, I'm in Great Amwell, near Ware... Close though... :D
     
  12. i could guesses you werent from hatfield, i mean the hatfield wannabe rudes neither have the will or ability, actually even he money to learn a music instrument, ill leaveem to their DnB, gotta love bein a a student in a town full of hicks that hate students:D
     
  13. Tom Crofts

    Tom Crofts

    Mar 15, 2001
    Yeah, hatfield is a hellhole, my cousin is from there and he's a racist, townie d*ckhead and he wants to be a policeman...