Dobro wiring, with a twist question...

Discussion in 'Tele Home Depot' started by HockeyPop98, Apr 9, 2018.

  1. HockeyPop98

    HockeyPop98 Tele-Holic

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    Ohio
    It's been quite a while since I've been able to work on guitars due to complications that sprang up from an auto crash 2 decades ago, but an awesome surgeon and modern medicine has gotten me back to a point where I can start restoring and making guitars. My focus for a little while will be on repairs and upgrades to family and friends' guitars, but a summer project has gotten my mind racing trying to figure out it's wiring so I can plan just what electronics to go with.

    I came across this beat up, roughly tele-shaped bare bones Dobro-style guitar body, no neck, that currently has 3 pot holes and the output jack hole, with little room to add more without enlarging the compartment. It's already routed for a humbucker above the cone, and has a fake soundhole (which I will port after I strip the body down to bare wood).

    What I'm wanting to do is strip it down, veneer it, make or adapt a neck, and install a piezo mic on the spider, and either a hb-sized gold foil or a dynasonic pickup. I'm figuring a volume/blend/tone setup for the controls. The problem is, my Achilles heel is drawing up original wiring. I can solder anything I see on paper/PC screen, but issues when mixing a magnetic and piezo pickup in the same line seems to me is a little more complicated than just soldering them together with the differences in impedance.

    The only wiring diagrams agrams I have come across that are even close all use 2 volume, 1 tone, and a 3-way switch. Can I ditch the switch and do what I want to do without it sounding like crap? Has anyone seen a vol/blend/tone diagram for piezo & magnetic pickups? If so, I'd appreciate being pointed in the right direction.

    I'm still in healing mode, but will start a thread once I get to working on this project.

    Thanks!
     
  2. R. Stratenstein

    R. Stratenstein Doctor of Teleocity Ad Free Member

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    Hey, Pop, good to hear from you, sorry to hear about the health problem, but glad you’re on the mend.

    I can’t claim any expertise at all with these things, but everything I read says you need blend circuitry in addition to the piezo preamp, so the output can be optimized for amplification. This diagram seems to fit your specs, for a blend pot, and also offers a “quick switch” that allows quick switching between the piezo and magnetic pickup.

    Diagram:

    http://www.graphtech.com/docs/default-document-library/blend-pot.pdf?sfvrsn=2

    Link to the cheapest seller of the blend amp I could find:
    https://www.amazon.com/dp/B001RF48N2/?tag=tdpri-20
     
  3. HockeyPop98

    HockeyPop98 Tele-Holic

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    Ohio
    Thanks Rick, I knew it wouldn't be long before someone would have the info I needed!

    I'm glad I looked into this early. I knew I'd be throwing some cash at this sucker, but it's going to take even more than I expected. That'll give me plenty of time to butter up Momma before I hit her with the news!
     
  4. Davecam48

    Davecam48 Friend of Leo's Ad Free Member

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    Joe ..........Mate! So glad you have surfaced after such a long time. I often wondered if you ever found your pick!!! :lol:

    Glad to hear you are on the improve, now don't go overdoing it and relapse. Look after yourself and take small steps.

    Regards Dave
     
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