Footswitch A15Mk1

    Hi!
    I'm going to buy the A15Mk1Deluxe kit but i have some questions about the footswitch. Does a footswitch work with the output footswitch in the back pannel?
    What do i need? Just a footswitch 1PDT that i will put in a box? Or i need relays to buy too more of the kit?

    Re: Footswitch A15Mk1

    Indeed my question is: what components do i need to put inside the footswitch? Do i need only a 1PDT? Or others components? I just want a footswitch in order to change the canal (canal clean/overdrive). I want to order the A15Mk1 and the footswitch in the same time.

    Sorry for my english, i'm french! ;D

    Re: Footswitch A15Mk1

    Just to switch between clean and overdriven sound ju just need a monojack with a single DPDT-Relais.

    If you like to have a 3 channel footswitch (clean, overdrive, overdrive with boost) let me know ;)
    I´ve built one myself and still have the schematics.

    Crank it!

    Re: Footswitch A15Mk1

    Hi!
    Yes I would like to see your schematics please. I would like to have a 3 chanels footswitch.
    I'm going to build an another A15 (cool!) so i will order soon.
    Thanks!

    Re: Footswitch A15Mk1

    Hi mathieu2703

    Je ne parle france! Une petit english! ;D

    Your english is very well.

    Bierschinken designed one Footswitch, like this way: http://forum.musikding.de/yabbse/index.p…g68819#msg68819

    And I designed this footswitch with bistabil Relais:

    http://forum.musikding.de/yabbse/index.p…g47484#msg47484

    If you have any questions, you can send me a mail (private Mitteilung)

    Salut, Hatti

    Jeder ist etwas Besonderes! Auch DU! Lebe entsprechend; individuell!

    Re: Footswitch A15Mk1

    Danke schön für deine Antworte. Ich spreche Deutch nitch sehr gute. ;D

    Maybe I would make a three channels footswitch with only two switches (one for clean/high gain and the other fo high gain+/++), two relays from musikding and a stereo jack. Is it possible?

    I don't know if I need momentary footswitches or normal footswitches. Should I wire the relays in parallel with amp switches? Does only amp switches work if no footswitch is connected, and only footswitch works if the footswitch is connected?

    I writed my first idea but I'm not sure about it.
    http://img206.imageshack.us/img206/2640/footswitchbn8.png

    Hello Everybody !

    A long time ago, i followed this schematic to do the power supply 12Vdc for the Finder Relays 12V that I putted in my A15 amplifier: http://forum.musikding.de/cpg/displayima…rch&cat=0&pos=4
    It worked until a short time ago (sorry for my bad english ! :) )

    So, the power supply is plugged in parallel with the circuit that generates the -19Vdc bias voltage of the power stage. And it doesn't work anymore. I read somewhere on this forum that I could'nt do that, because it was forbidden. But on my software simulation, it works.

    If I can't generate a -19Vdc bias voltage and a +12Vdc power supply for the relays on the same transformer ( 21Vac I think), how could I do? I have only a 6.3Vac voltage except 21Vac...

    Thanks a lot.

    EDIT : I think I have a solution, but I need to go to a shop. I need to buy a 7912, negative regulator voltage, and put it after the bias pot. Is it not bad to put a very big capacitive load on the pot (2200µf), or it will be better for noise filtering of the bias point?
    thanks,

    Hi,

    BR1 is a simple Bridge Rectifier (e.g. 40 V /0.5...1 A)

    The function of the additional components isn't easy to explain (for me).

    It's a kind of voltage doubler, which doubles "down" from the positive voltage and so you get a negative voltage at the output with respect to ground...

    Bernd

    Jaichweiß (Andy Pipkin)

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