NAD: BMR

Discussion in 'Amp Central Station' started by schmee, Jul 26, 2018.

  1. Ringo

    Ringo Poster Extraordinaire

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    Ouch! how was it packed? who was the shipper? I didn't know they glued and stapled those cabinets.
    Hopefully they insured the package and you can get at least a partial refund for the damaged cabinet.
     
  2. Crobbins

    Crobbins Friend of Leo's Ad Free Member

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    hopefully you can repair that, or return it. Good luck.
     
  3. Paul in Colorado

    Paul in Colorado Telefied Ad Free Member

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    OUCH!
     
  4. schmee

    schmee Friend of Leo's

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    A partial refund is in process. I should come out good! I once had this happen to a 70's Super Reverb. It arrived in 5 pieces! In the end I got a free Super Reverb!
    I tested the BMR and it works, trem and reverb works too. But now I have to sit while waiting to see if Fedex will come to inspect it or not.
     
    Last edited: Aug 6, 2018
  5. Wyatt

    Wyatt Tele-Afflicted

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    15 years ago, the DIY-project-du-jour was buying BMR (which averaged $200-300 then) and turning them into Vibroclones, BF Vibroverb clones. Companies made "Vibroclone" faceplates and everything.
     
    Last edited: Aug 7, 2018
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  6. schmee

    schmee Friend of Leo's

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    Yeah, I had one!
     
  7. schmee

    schmee Friend of Leo's

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    An update:
    Going through the amp now, full cap job as the filters and all were originals. It appears nothing has ever been done to this amp. Not one thing I can see. I'm BF'ing the bias circuit.
    All the pre tubes are RCA's! Haven't tested them yet though, not so sure they are still good.
    A couple questions for the techy guys:
    -I didnt have the two 70uf filter caps in stock so I put in a couple 100uf I had for now. Not sure why the resistors between the 20uf filters are not 1 k and 4.7k like most Fenders though....?
    -It has 6L6GC's in it made in West Germany. Anyone recognize what these are? There's a disc shaped getter on the bottom left just above the base in the picture.
    [​IMG]
     
  8. schmee

    schmee Friend of Leo's

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    Anyone recognize that tube?
     
  9. Wyatt

    Wyatt Tele-Afflicted

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    It's Russian-made 6П3C (6P3S)

    It was common in the '80's to buy from Soviet-bloc manufacturers and relabel the tubes to avoid embargo. Western governments looked the other way because these tubes were needed to fulfill military contracts in the U.S. and U.K.
     
  10. schmee

    schmee Friend of Leo's

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    Thanks! But it does say W Germany on it...? Two places.. Gold pins..
     
  11. Wyatt

    Wyatt Tele-Afflicted

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    It's a lie. This tube was made by Reflektor in Saratov, shipped to RFT in East Germany, sold to a distributor in Western Europe (probably Siemens), and the base and silk-screen were added for the final client.

    [​IMG]

    RFT was shuttered as a condition of German unification and that tube pipeline fell apart. By the early '90s, with RFT closed and EI bombed out of existence by NATO during the Balkan War, tube production entered a dark age of sorts — no real 6L6GC, no 6V6GT, on EL34 (Tesla/JJ), that's why the Sovtek 5881 dominated the '90s until more Russian and Chinese tube designs made it to market.
     
    Last edited: Aug 11, 2018
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  12. schmee

    schmee Friend of Leo's

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    Yep, that's it!
     
  13. schmee

    schmee Friend of Leo's

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    Update, The tune up and cap job is done and it sounds fine.
    One problem... There is a very light ticking in the back ground. It's almost dead on at one second intervals.:
    -Not effected by the vibrato on or off. If vibrato is on the ticking is different speed than the vibrato pulse.
    -The ticking does not change volume with guitar volume change that I can tell.
    -The ticking does change volume with amp volume, but it never gets loud.. minor change.
    -The ticking goes away with the guitar cord unplugged!

    Ughh... not heard this one before!
    Any ideas?
     
  14. Wyatt

    Wyatt Tele-Afflicted

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    Some common culprits...
    • Quartz wristwatch or wall clock
    • RF interference from cell phone or similar (plus, most processors have an internal clock)
    • AC device like a ceiling fan
    • DC discharge in amp from a bad component
    • Poor continuity between parts of the circuit
    In short, it's a nightmare to troubleshoot. But I would start by trying it in a different location and seeing you can narrow it down to the chassis.
     
  15. grolan1

    grolan1 Friend of Leo's

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    Had a BMR made into a Vibroclone, it was a fantastic amp in the end. Congrats and sorry about your cab in shipping, but I bet you come out better for it in the long run. :D
     
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