Saturday, 14 April 2012

Fender Blender

This layout was based on the original schematic, but here's the manufacturers info about the reissue:

There are few Fender products with as much "indie cred" as the Fender Blender. Once thought of as an overly harsh fuzz pedal, the Blender, thanks to players like Billy Corgan of Smashing Pumpkins and Kevin Shields of My Bloody Valentine, is now a coveted, and rare, vintage pedal. Like Fender have done with guitars & amps, they are reissuing this pedal to satisfy the demand that has surged past the supply on the vintage market.

The beauty of this pedal is that it does not sound like anything else on the market. It has a totally unique voice. This is a pedal made for players who want to create instead of copy. With a bit of experimentation, a player can get countless sounds out of this pedal, some that were intended and some that were not.

The Blender can be used for leads by metal players looking for an ultra-aggressive tone. This will replace other Octave/Fuzz pedals on pedalboards throughout the land








43 comments:

  1. Thanks buddy, need something to cheer me up a bit. Gutted. ;0(

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    1. Yeah me too mate, was rooting for ya

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  3. Can't seem to get this to work properly, it only has loads of gain from the transistors but no specific fuzzy sounds or octaves up. Any ideas?

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    1. I haven't built this one yet, anyone else had good or bad luck with it?

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  4. yeah, i've been back and forth on this one for some time now, and I can't get it working...

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    1. just plain no sound. I've checked the board inside and out, and all seems correct to the diagram. I'm rewiring all the pots once again. I've read other places that Sustain is Log, not lin. shouldn't matter though...

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    2. I've been over the layout again and can't see any errors. If you both take a high res front and back pic and post the links on here, I'll have a look and see if anything stands out.

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    3. yeah, i think I'll send you some pics. I'm no pro at this stuff, so I might be overlooking or doing something incorrectly, but I re-hooked up each pot and switch again, with no change, still no sound. I'll post pics in a few minutes...

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  5. Will get my probe out tomorrow and search for problem areas!

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    1. Thanks man, much appreciated

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    2. The sound disappears at the anode side of the first two diodes while everything before that gives sound! Hope this helps!

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    3. Thanks for that. Very strange though, they're definitely in the right orientation. What transistors did you use?

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    4. I used 2N5088 turned 180 degrees!

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  6. Idk how I missed this one. Must build! Hopefully I'll get a chance to build it before vacation. Now what kind of enclosure to put it in....

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  7. anyone resolve their issues with it yet?

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  8. Tag this as verified. There are so many different resistors that I am going colour blind.

    (Pseudo) tone bypass makes the tone bassy and muddy. I got better tones with the tone knobs switched on. Might remove the tone switch if I am to box this. More messing around with the strange tonestack might yield more interesting results.

    The blend knob is quite cool. Moves the fuzz to the background while retaining a meatier tone.

    I might have to try out higher gain transistors. I had some 300+ hfe transistors in there. Feels like the circuit is just borderline fuzzy enough.

    Some of the components I used did not fit in the layout complete (eg the diodes I used are at least 4-5 rows long, 47n cap needs 3 rows). I had a veroboard which has 2 more rows and that helped with the spacing.

    I also used 2 x 22k resistors + 10k trimmer instead of 2 x 27k resistors in the octave up section of the circuit. The trimmer might help tune in the ideal octave effect.

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  9. i just built this one tonight, and while it kinda works, mine doesn't sound or work like the original at all. i've tried multiple tansistor types and gone over my build a bunch of times to make sure that everything is built according to the vero, but it's basically a distorted mess so in the bin she goes.

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  10. okay, i fixed it and it now works properly. according to the original fender schematic, the emitter resistor to Q1 is supposed to be 1.5K and not 15K.

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    1. Cheers John, I'll update the layout but the schematic I did it from showed 15K, it was the one by Topopiccione Electronics. But if it sounds right at 1.5K that'll do for me, it could easily have been a mistake in their scheme.

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    2. yeah, i saw that schematic, but i also collected a whole bubch of other ones too, and think that the actual fender one is probably the most accurate. i get some auto oscillation in a couple of drastic control settings, but i'm not sure if the original or the RI does (and i can't remember if ther original one that i owned in the 70's did it), but overall, mine does sound exactly like the youtube videos that i've seen of them.

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  11. i wasn't too crazy about the sound of mine when i clicked it into the boost mode (it was all mids, no highs with less lows) so i replaced the 47k resitor with a 10k one and added a tiny midrange cut circuit to it for that setting. for me, i find the 'boost' setting ALOT more usuable this way.
    here's the tiny vero that i made for it:
    http://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/FenderBlender/Mid_Cut_Filter.png

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    1. got her all boxed up and labeled today. here's a couple of pics of it:

      http://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/FenderBlender/FenderBlender-01.jpg

      http://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/FenderBlender/FenderBlender-02.jpg

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    2. beautiful work!
      with what method are you printing the logos on it ?

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    3. thanks. I use a brother p-touch labeler for my pedals.

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    4. Where do the in and outs of the filter tie into? Also I didn't quite understand the calculator. Can you make a suggestion for the values on your daughter board. I'll take advise from anyone just I case John doesn't revisit this.

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  12. I had a request to build one of these and used your layout. It's a pretty crazy pedal. Thanks.
    https://www.youtube.com/watch?v=wvmVY7w91fA&feature=plcp

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    1. Great job Jeremy, thanks for the vid

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  13. Could somebody do an off board wiring diagram for the tone switch, please?

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  14. What's the difference between the 2N3391A and 2N3391? If I read the datasheet correctly, the A is low noise. Can I just use the A's cause I can find those dirt cheap at Tayda?

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  15. Built it, what a monster! How do I omit the tone switch (which is quite useless IMHO)?

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    1. Just remove the Tone pot, switch and wiring, and make a link between the Sw1 and Sw2 connections on the board.

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  16. Does anyone have an offboard wiring diagram for this? I've seen a few gut shots but I can't quite make it all out. Thanks in advance!

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    1. http://tagboardeffects.blogspot.gr/2012/02/offboard-wiring.html

      http://tagboardeffects.blogspot.gr/2012/04/vero-build-guide.html

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  17. i've made the circuit and works almost fine.... thank you!!!! that "almost" is because when i leave ringing some chord, the sound starts to choppy at the end of the sustain.... it is normal or could be something wrong in my circuit???? i think maybe could be a capacitor in bad shape or something like that.... i'll waiting for your answer.... and thank you again!!!!

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    1. in this circuit in particular i used silicon diodes 1n4148.... could be the reason of the choppy sound????

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    2. You need to use Germanium Diodes for this circuit, use some 1n34a and see how it works out. The original also used Germanium diodes

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    3. I used 1n34a and still hear that choppy sound. I get no fuzz out of this box anyway, just a rather clean signal with a choppy hiss. the blend knob, when turned down, doesn't give me a clean signal either. tripple checked on- and off-board. please help - i need to have this pedal!!!

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  18. so I've done an audio probe troubleshooting. turns out already at Q1 I don't get an output signal at Collector C, so, of course, almost all of the rest is dead. I have several transistors tested (2N3391A, BC549C and B).
    What could be the problem? Where's the bug? Please help!

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