Some more electronic questions

Discussion in 'Tele-Technical' started by SixStringSlinger, Jun 19, 2019.

  1. SixStringSlinger

    SixStringSlinger Friend of Leo's Silver Supporter

    Posts:
    2,563
    Joined:
    May 21, 2006
    Location:
    Space
    I just wired my first guitar, and while not an unqualified success, it was interesting and I'm eager to try some more. I do have a couple of guitars that could benefit from a treble bleed, so:

    1) Where do you get electronic parts? Specifically caps, resistors and such. Radio Shack ain't as easy to find as it used to be.

    2) Does the value of the cap and/or resistor on a treble bleed change depending on the value of the pots in the guitar? I know two people using the same guitar may prefer different values, but is there any general rule of thumb for 250k pots vs. 500k vs. 1meg?
     
  2. dan40

    dan40 Tele-Afflicted Silver Supporter

    Posts:
    1,184
    Joined:
    Aug 19, 2015
    Location:
    Richmond Va
    For a good selection try Antique Electronic supply (tubesandmore.com) and Tube Depot. 1/4-1/2 watt resistors will be fine but 1 watt will also work if it's easier to find. If you do a Google search for "guitar treble bleed" you will find a bunch of info on different styles and values for a treble bleed circuit.
     
  3. rigatele

    rigatele Tele-Afflicted

    Posts:
    1,287
    Joined:
    Apr 20, 2014
    Location:
    Canada
    You can order some very good cap and resistor assortment packs from China on AliExpress or Ebay. Then you have all the values on hand.
     
    SixStringSlinger likes this.
  4. kbold

    kbold Tele-Meister Silver Supporter

    Posts:
    461
    Joined:
    Jul 21, 2015
    Location:
    Australia
    Rule of thumb: use a resistor half the value of the pot.
    i.e. for 250K pot use 130K resistor, for 500k pot use 250K resistor
    Experiment with cap: typically 500 to 1000pF

    You forgot:
    3) Do I use parallel or series (Kinman) treble bleed??

    I use Kinman bleed (cap in series with the resistor), because it has less effect on the pots audio taper.
     
    SixStringSlinger likes this.
  5. SixStringSlinger

    SixStringSlinger Friend of Leo's Silver Supporter

    Posts:
    2,563
    Joined:
    May 21, 2006
    Location:
    Space
    Thanks, that's the sort of guideline I was looking for. And I haven't forgotten about the different sorts of treble bleed :lol: I just thought I'd experiment with that on my own. But thanks for the tip, I don't want to mess with this pot's taper.

    Have you (or anyone else) tried the treble bleed on the American Professional Series? Apparently this is how it's done:

    upload_2019-6-20_9-35-32.png

    I'm mostly curious because it's included on the Am. Pro. Jazzmaster, and my Jazzmaster is one of the guitars I want to put a treble bleed on (it can get unbearably trebly, but I'd rather tame that with the tone knob and have the volume leave that aspect of the tone alone).
     
  6. SixStringSlinger

    SixStringSlinger Friend of Leo's Silver Supporter

    Posts:
    2,563
    Joined:
    May 21, 2006
    Location:
    Space
    Oh, and any idea on how to improve the taper on a tone pot that seems to have the most effect between 0 and 2? Can anything be done, or do you just have to change the pot?
     
  7. BorderRadio

    BorderRadio Poster Extraordinaire Silver Supporter

    Posts:
    7,779
    Joined:
    Apr 2, 2014
    Location:
    Phoenix, AZ
    Instead of buying a bunch of caps and resistors, I bought a V-treb for things like gold foils and Dynasonics, where I'm not sure what values work best to my ears. Down side is I still don't know what values work best, but I don't care because I just dial in the best response with the V-treb and be thankful I saved myself a few hours :)
     
    SixStringSlinger likes this.
  8. SixStringSlinger

    SixStringSlinger Friend of Leo's Silver Supporter

    Posts:
    2,563
    Joined:
    May 21, 2006
    Location:
    Space
    I was looking at those. You basically install and turn the knob till you like it?
     
  9. BorderRadio

    BorderRadio Poster Extraordinaire Silver Supporter

    Posts:
    7,779
    Joined:
    Apr 2, 2014
    Location:
    Phoenix, AZ
    Yep, pretty much. You can stick it on the back of the pot, it comes with the double sided tape already mounted. But then I can't adjust it, so I attach it with a decent lead of wire, so I can play the guitar for a few days, leaving the V-treb PCB hanging out. When I find the adjustment I like, I tuck it back in under the pickguard. Goop it with silicone if you don't want it to accidentally move on you.
     
    SixStringSlinger likes this.
  10. SixStringSlinger

    SixStringSlinger Friend of Leo's Silver Supporter

    Posts:
    2,563
    Joined:
    May 21, 2006
    Location:
    Space
    Ah, the website says it's made for 250k and 500k pots. Have you tried it on a 1meg pot?
     
  11. moosie

    moosie Doctor of Teleocity Silver Supporter

    Posts:
    14,769
    Joined:
    Jul 18, 2010
    Location:
    on the roof
    The V-Treb is a nice idea, but be aware that it only varies the resistor value. The cap is fixed. To that end, it should be simple enough to measure both resistance and capacitance with a meter. I assume the cap value is not printed on the component...
     
  12. BorderRadio

    BorderRadio Poster Extraordinaire Silver Supporter

    Posts:
    7,779
    Joined:
    Apr 2, 2014
    Location:
    Phoenix, AZ
    Nah, I never use treble bleeds on 1megs because I only use 1megs on Jazzmasters. I like the high-end roll off when I pull back the volume. The only 'standard' treble bleed that I use is a 150k resistor and a 0.001uF cap both in parallel for use with Filtertrons, and only on the master volume, which is a 500k pot.
     
  13. radiocaster

    radiocaster Poster Extraordinaire

    Posts:
    5,124
    Joined:
    Aug 18, 2015
    Location:
    europe
    Back in the day I'd find all kinds of cool local places that sell electronic parts or instruments or records in the phone book.
     
  14. kbold

    kbold Tele-Meister Silver Supporter

    Posts:
    461
    Joined:
    Jul 21, 2015
    Location:
    Australia
    Sounds like you have a linear pot fitted there.
    Replace with an audio taper pot.
     
    SixStringSlinger likes this.
  15. magicfingers99

    magicfingers99 Tele-Afflicted

    Posts:
    1,661
    Joined:
    May 7, 2015
    Location:
    atlanta
    try mouser.com
    or digikey.com

    mouser has cheaper shipping and a great selection.

    also ebay for small qtys - most comes from china
    since american industry was gutted to destroy -- well you figure it out....
     
    Blue Bill and SixStringSlinger like this.
  16. magicfingers99

    magicfingers99 Tele-Afflicted

    Posts:
    1,661
    Joined:
    May 7, 2015
    Location:
    atlanta
    amazon has some good electronic sampler kits as well, sometimes priced quite nicely.
     
    SixStringSlinger likes this.
  17. SixStringSlinger

    SixStringSlinger Friend of Leo's Silver Supporter

    Posts:
    2,563
    Joined:
    May 21, 2006
    Location:
    Space
    Hmm. It's part of a kit, so I'll check the website to see if it specifies. Any way to tell otherwise?
     
  18. Mark the Moose

    Mark the Moose Tele-Meister

    Age:
    44
    Posts:
    356
    Joined:
    Sep 4, 2018
    Location:
    Erie, CO
    Well, I see you live with in space...shipping might be a problem.

    Tayda Electroncs, Mouser, mojotone, even Amazon.
     
  19. jvin248

    jvin248 Poster Extraordinaire

    Posts:
    7,270
    Joined:
    Apr 18, 2014
    Location:
    Lions & Tigers oh Mi !
    .

    Google 'guitarnutz2 treble bleed' and you'll find probably the best description of all the treble bleeds and effects of sizing the caps and resistors.

    .
     
    SixStringSlinger likes this.
  20. kbold

    kbold Tele-Meister Silver Supporter

    Posts:
    461
    Joined:
    Jul 21, 2015
    Location:
    Australia
    Multimeter.
    Set the pot to 50% travel and measure resistance middle lug to upper lug, then middle to lower lug. If these values are the same its a linear pot.
     
    SixStringSlinger likes this.
IMPORTANT: Treat everyone here with respect, no matter how difficult!
No sex, drug, political, religion or hate discussion permitted here.


  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.