What year is this Ampeg B-15N?

Discussion in 'Amps and Cabs [BG]' started by WSquires, Aug 5, 2020.

  1. WSquires


    Jun 11, 2015
    Calgary, Alberta
    Hey folks!

    I'm excited to say that I now officially own a flip-top amp! The original owner said he bought this amp in 1973, and I was wondering if I could get some help confirming what year it was manufactured. As well, do you folks have any recommendations for sources of Ampeg schematics? It's going to need a little TLC, but I look forward to cleaning this amp up and using it to record. :)

    Looking forward to hearing what you all think!

  2. beans-on-toast


    Aug 7, 2008
    Late '67 -70's. Speaker says 1967. You'll need to open the chassis and look at the date codes on the pots, starting with 137 followed by the year and week of year.
  3. WSquires


    Jun 11, 2015
    Calgary, Alberta
    So I got my answer for the schematic. I opened up the head and was surprised to find the original paper schematic in there.

    Here are a few pictures from the inside of the amp.
    IMG_20200805_133640.jpg IMG_20200805_133649.jpg IMG_20200805_133736.jpg IMG_20200805_133603.jpg IMG_20200805_133612.jpg
    Roxbororob and westrock like this.
  4. WSquires


    Jun 11, 2015
    Calgary, Alberta
    Based on these pot codes I'm guessing this amp was made in 1970?
  5. coreyfyfe


    Nov 19, 2007
    boston, ma
    I think the speaker says 70, if I’m reading it right. 137 7007, the last digit seems faint, but early 70 speaker would fit with the pots and PEC modules being ~mid 1970.
    WSquires and beans-on-toast like this.
  6. bobyoung53

    bobyoung53 Supporting Member

    I bought one of those brand new somewhere around 1980. I'm one of the rare people who like the sound of those as much if not more than the 60's amps..
  7. beans-on-toast


    Aug 7, 2008
    Yes you’re right, my bad eyes...Thanks. I see 34th week of 70 on the PEC tone module. From the codes, it was probably manufactured in the summer of 1970.

    The head looks all original which is wonderful!
    Last edited: Aug 5, 2020
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  8. WSquires


    Jun 11, 2015
    Calgary, Alberta
    Apparently the amp has only a few hours of play time. The owner didn't play much and lugged it from one house to another for all of these years.
    beans-on-toast and coreyfyfe like this.
  9. JimmyM

    JimmyM Supporting Member

    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    Looks like a good one. If the price is right, snag that baby!

    Oops...I guess you already did :D
    Last edited: Aug 5, 2020
  10. beans-on-toast


    Aug 7, 2008
    Every amp that I’ve bought in California had one of those orange stickers.
  11. Killing Floor

    Killing Floor Supporting Member

    Feb 7, 2020
    Austin, TX
    Nice find! Congrats.
  12. bass4more

    bass4more Supporting Member

    Aug 11, 2007
    Oakland, CA
    She's a beauty
  13. dan1952

    dan1952 Commercial User

    Jun 27, 2012
    Anderson IN
    Artist Endorsement with Supro Huntington Basses / Owner, Dan's Music, Inc..
    Nice! I've had 4 B15's, and the best was one just like yours.
    WSquires likes this.
  14. nilorius

    nilorius Inactive

    Oct 27, 2016
    Riga - Latvia
    I think the most precise way to know the made year is to take to some center where ampeg gear is being made. Yes, it is pretty difficult, but if You really need this - it's the only way. As to schematics - internet.
  15. JimmyM

    JimmyM Supporting Member

    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    Unless you live near Calabasas CA, not so easy for most. And even they can't tell you how to date certain eras of Ampeg gear as the info was disposed of a long time ago. Some eras, however, are easily dated by serial. This one isn't, so you use part codes to guess.
    nilorius likes this.
  16. Wesley R

    Wesley R Gold Supporting Member

  17. WSquires


    Jun 11, 2015
    Calgary, Alberta
    Thanks everyone! I just cleaned the tolex and am going to attempt cleaning the hardware. A lot of the nickel bolts are corroded and areas such as the chrome latches have spots of rust. Any recommendations for how to gently clean the pieces of hardware on an amp?
    JimmyM likes this.
  18. beans-on-toast


    Aug 7, 2008
    I use Autosol metal polish, you might find it locally at Walmart or a car supply place, otherwise https://www.leevalley.com/en-ca/sho...shing/67014-autosol-metal-polish?item=54Z1510
    WSquires and JimmyM like this.
  19. Eric Huber

    Eric Huber

    Aug 20, 2019
    Nice very nice!!
  20. Wow.... sure looks like a very well preserved example.
    Great snag! :thumbsup: