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Where to Buy VTL5C9 LDR Optocouplers for my Mark IV

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  • Where to Buy VTL5C9 LDR Optocouplers for my Mark IV

    do you know Any place in The US ?
    Thanks

  • #2
    Try here; http://smallbear-electronics.mybigco...vactec-vtl5c9/
    Small Bear Electronics
    123 Seventh Avenue #156
    Brooklyn, NY 11215
    Support for Fender, Marshall, Mesa, VOX and many more. https://jonsnell.co.uk

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    • #3
      Thank Jon,!! I Cannot find the checkout button only a wish list.

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      • #4
        Original ones but not cheap:

        http://www.banzaimusic.com/Vactec-VTL5C9.html

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        • #5
          These should work, also.

          https://www.audiolabga.com/mal_cart/..._button=Search
          "Yeah, well, you know, that's just, like, your opinion, man."

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          • #6
            Originally posted by The Dude View Post
            No Stock Very good price thou

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            • #7
              When I click it says they have 3 in stock.

              Mouser has the same ones.

              https://www.mouser.com/Optoelectroni...OPI110&FS=True
              "Yeah, well, you know, that's just, like, your opinion, man."

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              • #8
                Careful, the ones at Mouser and the other place are not photoresistors, they have phototransistors as outputs.
                https://www.mouser.com/datasheet/2/4...64-1530631.pdf
                Education is what you're left with after you have forgotten what you have learned.

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                • #9
                  While we know in advance Mesa would tag a large handling fee and shpg fee on the parts, they no doubt DO have the part in their inventory. Have you contacted them, just for fun, to see what the damage is? I forget who I had last bought VacTec parts from. They were starting to become scarce in the early 2000's.

                  You could try contacting Stretch at Valley Sound Music Technologies in Burbank, CA on Cahuenga Blvd. Not sure what his status is due to the pandemic, but I'm sure he has a variety of VacTec's on hand, having been doing backline gear repairs for decades.
                  Logic is an organized way of going wrong with confidence

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                  • #10
                    Originally posted by nevetslab View Post
                    While we know in advance Mesa would tag a large handling fee and shpg fee on the parts, they no doubt DO have the part in their inventory. Have you contacted them, just for fun, to see what the damage is? I forget who I had last bought VacTec parts from. They were starting to become scarce in the early 2000's.

                    You could try contacting Stretch at Valley Sound Music Technologies in Burbank, CA on Cahuenga Blvd. Not sure what his status is due to the pandemic, but I'm sure he has a variety of VacTec's on hand, having been doing backline gear repairs for decades.
                    Well, I recently asked Mesa for it and got a message from Mesa Germany, that original Vactec VTL5C9s are no longer available from Mesa Intl./USA.
                    The Banzai, eekpray etc. VTL5C9 types seem to be all the same chinese copies with a great garden variety of specs, so you must buy 5 or 10 to select one that works properly. What’s the problem with your MK4? I‘m stuck with the repair of a MK4a, see https://music-electronics-forum.com/...ad.php?t=51016.
                    Zouto
                    Last edited by Zouto; 05-28-2020, 02:37 PM.

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                    • #11
                      Thanks guys!!
                      Zouto my amp did not switch between channel. My tech found both 10k uf leaking and many 39 ohms bad due to faulty Vactrols.

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                      • #12
                        I finally order from China.

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                        • #13
                          Note that the proposed subs like the OPTEK OPI110 have a transistor output, 30V max. Not tube-amp-friendly!

                          Not for the Mesa, but they are cheap. $2.36 for one at DigiKey.

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