Recent content by jacotosh

  1. J

    Official Ampeg Portaflex Club

    Yeah I was just kidding about the R.V. thing too. According to my Ampeg book when they went to the B15NF in '65 they also went to the single baffle. So maybe I have two orphans that found a happy home. Either way I'm happy and have no plans on changing anything. Thanks for the input. I have only...
  2. J

    Official Ampeg Portaflex Club

    Well you are right. The schematic said B-15NF from 1-'66, but from your description I still think it is a double baffle. It has the 8 oblong ports on the speaker baffle and then there is another baffle that the grill cloth is mounted to. Unless I'm missing something that is the double baffle...
  3. J

    Official Ampeg Portaflex Club

    Jimmy, Here is a better pic, hope that helps.
  4. J

    Official Ampeg Portaflex Club

    I think it is from a transition year, because I have never seen another one exactly like it. It is a double baffle, but with black tolex and the silver grill cloth. I know that after they went from the Blue diamond tolex to the black (in '67) there was a chrome trim around the cabs and the the...
  5. J

    Where do I plug this sucker in?

    One more thing. There may not be someone at the venue qualified or willing to tie in your bare copper lines to the breaker, so learning how to do this safe and properly will be useful. You will be tying your lines on the opposite side of a breaker, so it is relatively safe, but live wires will...
  6. J

    Where do I plug this sucker in?

    The typical power provided in bigger venues besides 20A 120V, is going to be three phase power at a main breaker somewhere. More than likely you will have to own or rent your feeder cable lines. We are talking big heavy 2/0 gauge cable here, and a set of all five(three hots, ground and neutral)...
  7. J

    Ampeg V4B Cab - Folded horn enclosure

    could you elaborate, and name a few
  8. J

    Official Ampeg Portaflex Club

    count me in. I'm guessing it is a '66 or '67
  9. J

    Which Vintage Bass spk. is best, Altec 421A or JBL D140F?

    What do you mean Acoustic forum? Do you have a link? It is nice to know some of these guys are still around and willing to take the time to offer up some insight. I talked to Jess Oliver once on the phone to ask him some questions and he was real nice. He didn't seem to mind spending a few...
  10. J

    Which Vintage Bass spk. is best, Altec 421A or JBL D140F?

    The Altec magnet is ceramic. where the JBL's are alnico. I would think it would have an effect on the tone. As far as power handling. The Altecs are rated 100w, where the JBLs are rated at 50w or 60w I believe.
  11. J

    Power Tube Replacement

    Just wanted some input from all you vintage tube amp lovers out there. When and how often do you replace your power tubes? (I know this depends on usage) How can you tell if a power tube is in need of replacing? I have a late 70's V4B with the orginal tubes in it. I was thinking of taking it...
  12. J

    Altec Lansing 421

    I'm looking at getting a 2X15 cab that is loaded with some of these speakers. I've never heard any personally and was wondering what your guy's thoughts were on these. How do they compare to say a JBL D140f? Are they efficient? Thanks for any input.
  13. J

    10 inch speaker suggestions

    I think the original SVT 810 had CTS speakers with alnico magnets. They are probably hard to come by/too expensive for my needs. I also think their power rating isn't high enough for my purposes either. I believe the 1st generation cabs were only rated at 200watts total for all 8 10s. Not sure...
  14. J

    10 inch speaker suggestions

    Okay since it seems like I'm getting more questions than answers. I will try to be more specific. I haven't got the cab yet. So, I'm starting from scratch. I'm looking at getting a 4X10 cabinet from fliptops.net. It is a sealed cabinet with the speakers sealed off in pairs like an SVT cab. So...
  15. J

    How important is power cable lenght ?

    The thickness of the the cord doesn't really matter, it is the gauge of the cable and hence the size of the copper conductors inside that does. You can have a lot of insulation on a cable with high gauge wire inside. The gauge should be listed on the outside of the cable. Probably 14AWG or...