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Markyboard

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Posts posted by Markyboard

    Looking at a Hammond A100 today

    in The Keyboard Corner

    Posted

    I have heard (maybe here) that techs usually have a scanner ready to go and swap it for one that's motorboating, and then clean the motorboating one at the shop later. Then that's ready for a swap when he needs one.

     

     

    You mean like this one sitting on my shelf for 3 years waiting to be cleaned?

    6ahtcXPl.jpg

    Looking at a Hammond A100 today

    in The Keyboard Corner

    Posted

    I have recently done a scanner. Here's my experience:

     

    A friend's '70 B-3 started motorboating. We did the battery zap and it fixed it for a day or two. We came back again with more batteries and zapped it with a higher voltage. No dice this time - only a scanner clean out would do.

     

    It went pretty smoothly. It was my first, but I followed the excellent directions Benton provides (which I'll link below.)

     

    I managed to remove the scanner from the motor and weasel it out to be disassembled, without removing manuals or disconnecting large harnesses. Read and heed the web page and see if something like that is worth tackling.

     

    https://bentonelectronics.com/servicing-the-hammond-vibrato-scanner/

     

     

    Great advice and info Moe! In addition you may want to glance at this thread.

    Who has a Moog Matriarch?

    in The Keyboard Corner

    Posted

    The idea of riding the Sustain fader on the Filter panel makes more sense to me now - it's yet another way of controlling dynamics while you play a chord or whatever with your other hand.

     

    Split the filters so that the amplitude ADSR controls filter 2. Use the filter separation control to differentiate filter 1/2 cutoffs. Then ride both sustains sliders in opposite directions This gives some really cool frequency dependent panning affects. :cool:

    ribbon/usb controller?

    in The Keyboard Corner

    Posted

    What´s the box, combining 2 3 of the ribbon controllers ?

    How does it work ?

    13721.jpg

     

    13722.jpg

    It's this box- about as simple as it gets. The ribbon uses a RJ-12 connector which is what old land-line telephones (remember those?) use - at least here in the US. I believe this box was intended for switching telephone lines.

     

    The knob select 1 of 4 inputs that appears at the output. Each of my 3 ribbons are connected to an input and the output goes to the Kurz. I first tried some simple 2 to 1 "T" connectors that short each of the 6 lines of 2 ribbons together. It works but with long cable lengths funny things start to happen. Even with this switching box there is a slight glitch crossing between the upper 2 zones on the longer cable runs. Not surprising and not a big deal at this point. I think its more a capacitance issue than resistance.

     

    This box is in serious need of a paint job. :sick:

    ribbon/usb controller?

    in The Keyboard Corner

    Posted

    This thread reminded me of a project I had on the back-burner. I wanted to convert this ribbon to work like a standard cv expression pedal substituting the RJ45 phone plug for a 1/4' TRS plug.

     

     

    PC2Rib.jpg

     

    Unfortunately some measuring revealed that it"s actually 3 independent touch sensitive resistors/potentiometers, 1 per zone. Each is 5 kOhms. Kurzweil uses some clever logic handled by the processor to combine these 3 zones into a single long zone if desired.

     

    There"s no easy way I can think of to do this in hardware. Changing the connections between zones would require cutting into the strip which I think would destroy the thing. I could use each zone for a different synth but as someone indicated on Theo"s 'abandonment' thread, some things just ain"t worth pursuing.

     

    While I was extremely busy doing nothing last Friday I was actually contemplating another Seinfeld inspired thread. This idea turned out to be pretty damn cool and a ton of fun if I do say so myself.

     

    [video:youtube]

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