1. Welcome to TalkBass 2014! If you're new here, we just went through a major site upgrade. Please post all concerns and bugs to the Forum Usage Issues forum. We will be monitoring that forum. Thank you for all of your feedback.

    The TalkBass iphone/android app is NOT WORKING currently. We're working on it. Tapatalk IS working, so if you need to use an app, use Tapatalk. Try using your browser though - TalkBass is now 100% responsive to your phone/tablet screen size ;)

    Please read the TalkBass 2014 FAQ for lots of great info on the new software.

Calling Ampeg V4BH users!

Discussion in 'Amps [BG]' started by Tim_the_Stoner, Feb 6, 2014.

  1. Tim_the_Stoner

    Tim_the_Stoner

    Joined:
    Dec 25, 2013
    Likes Received:
    0
    Heya :)

    Could someone with experience please tell me what value the Gain potentiometer on a Ampeg V4BH Classic Series from 2003 is? Someone told me it's a 1Meg Audio, but my technician says that's unlikely. I need someone with hands on experience to back me up so I can force him to do what I want him to do with my equipment.

    The original pot is faulty, btw.


    THANKS a 1.000.000 times beforehand!

    PD: If anyone has the schematics I'd be thrice as happy! :D
  2. nashvillebill

    nashvillebill

    Joined:
    Oct 13, 2002
    Likes Received:
    0
    Uh, it should be printed on the pot!

    Alternate method is to desolder the pot and measure the resistance between terminals 1 and 3 (even if the pot has a bad wiper, this will work unless the pot's carbon track has been damaged).
  3. nashvillebill

    nashvillebill

    Joined:
    Oct 13, 2002
    Likes Received:
    0
    The schematic shows 1M A by the way for the Gain (P1). Master volume is 50K linear, maybe that's what the tech was referring to.
  4. hodgy

    hodgy

    Joined:
    May 5, 2004
    Likes Received:
    0
    Disclosures:
    Tech Support- Ampeg/ Mackie
    The part number is 70-105-12. Call Loud parts at 1-800-898-3211 ext. 1623.
  5. Tim_the_Stoner

    Tim_the_Stoner

    Joined:
    Dec 25, 2013
    Likes Received:
    0
    There's no value on the pot, only a code. As I don't know the pot manufacturer I cannot see what that code means.

    So, 1meg Audio, as I've been told. Is this like a standard measure for Ampeg Gain controls?

    PS: I cannot call US, I'm located in Spain, EU.
  6. eyeballkid

    eyeballkid Supporting Member

    Joined:
    Jul 19, 2009
    Likes Received:
    13
    Disclosures:
    Records of Existence/PyrE owner
    hodgy knows.
  7. Forrrest

    Forrrest

    Joined:
    Mar 10, 2013
    Likes Received:
    0
    why don't you just measure it? (or is it broken)
  8. Tim_the_Stoner

    Tim_the_Stoner

    Joined:
    Dec 25, 2013
    Likes Received:
    0
    It's faulty.
  9. Tim_the_Stoner

    Tim_the_Stoner

    Joined:
    Dec 25, 2013
    Likes Received:
    0
    Bump...


    So, my tech thought he knew better and put a different value pot in the Ampeg... Now it sounds wonderful but at 1/100th of the volume I'm used to from it >.< I suspect he put 1K Audio, insted of the 1M Audio I asked for.

    Sooooo, back to the tech it goes... This time I'm ordering the spare part!

    Where do you get authentic Ampeg spareparts in Europe?
  10. nashvillebill

    nashvillebill

    Joined:
    Oct 13, 2002
    Likes Received:
    0
    Maybe you should think about using a different tech.

Share This Page