New uses for old things…

Hey everyone!

It’s been a while since my last update. My school and the work schedule has kept me away from my gear for too long…

The other day, I was jamming on the Dallas-Arbiter Fuzz Face clone that I built, and I noticed something funny – I could have sworn I heard an octave poking out… Turns out the battery was dying. On the neck pickup, this particular fuzz acts like an octave fuzz when the voltage is starved.

As my pedal died, I replaced the battery and lost the octave… Well, I built this pedal with 3 controls: standard Fuzz and Volume, as well as a Voltage control. If you back the voltage down a bit (ya gotta play with it), you can dial in that octave! Like and Octavia/Octavio, keeping the fuzz level lower and boosting output should help it come through. Also, playing on the neck pickup around the 12th fret also helps, as the harmonic overtones are strongest there (basic physics, yea?)…

Try modding a fuzz this way, and let me know how it turns out! It may simply be an artifact of the American Germanium transistors I used to build it… I’d be keen to hear your thoughts!

Enjoy the winter – play often!

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Summer begins; projects come in! (cont.)

I happened to be chatting with a friend about “this old delay pedal” that wasn’t working anymore. I decided to see what was wrong…

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Hmmm… looks like I found the problem!

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Replaced it, and we’re good to go! Edward, sorry I had to void the 20 year old warranty when I removed the screws to open it… Get spacious, my friend.

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I’ve been making quite a few 1/4″ cables lately, both for speaker cab applications and instruments.

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Here is a look at how I attach the cables to the plug. There is decent strain relief – nothing special, but definitely not the worst. I habitually bend the Tip connection down so that the cables’ connectors can approach the solder points (essentially) parallel.

I first bend the Tip lug, then fill the ground tab with a small pool of solder.  After stripping insulation on the cable, I tin the leads and trim them back.  After locking down the strain relief tabs, I then solder all the leads, then apply some heat shrink for additional strain relief, making sure not to cover the solder joints. Then I screw on the outer barrel, and that’s it.  Quality work takes time and good technique.

Summer begins; projects come in!

I just finished a commission for a friend. Here are the five 20′ XLR cables. Good luck with your new recording setup, Burke!

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I use Neutrik XLR connectors for their superior strain relief.  I use Audio-Technica AT-8300 cable for its superior flexibility, excellent shielding, and its ability to be adapted for many different cable types.
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A friend recently brought me a powered monitor that was dropped onto concrete. In addition to parts of the circuit board being cracked, the volume pot, XLR, and 1/4″ TRS jacks were busted. The volume pot spun indefinitely, and the shaft separated from the body… the XLR jack basically fell off of the board – its leads actually shattered… Additionally, the power amplifier chips had broken pins from the board shifting upon contact with the concrete…

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Here are the bad power amps and the old pot casing.

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Here is the crack in the board.

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Here, the new power amps are installed and ready to be soldered. Note the massive heat sink on these puppies…

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Here, the new potentiometer has been soldered in.

That 1/4″ jack posed more of a problem than I thought it could. I forgot to take pics of it because I was happy to see this one off of my workbench.  Hope it works well for you Nick!
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I’ll finish up with another update later tonight.

Welcome to Rossman Electronics!

Hello everyone,

     I’m not so great with this kind of thing, so I’m branching out into the way of the future.  Thius blog will be used as a portfolio of all of the work that I do with electronics.  I focus on analog affects with discrete transistors and ICs, guitar and bass amps (specifically Tube/Valve), and fixing/re-wiring of guitar/bass.  I CAN do setups and the like, but that’s not my specialty. (if that’s what you’re after, I recommend Evan at Bloomington Guitar & Amp – I’m a great businessman, aren’t I?)

     You wanna know what it is that I do? Keep your eyes – or at least some vanishingly small portion in the back corner of your brain – trained onto this place, and you may yet see something. 

     This summer (2013), I will be plunging into my work headlong.  My current projects include:

  • assembling a 600ms analog delay for guitar (tap tempo? modulation for repeats?)
  • repairing my 70’s “portable” (~40lb), studio 8-channel analog mixer
  • maintaining and fixing numerous guitars and amps for myself and my friends (more on that later (with pics!)

If you have any questions or requests, do not hesitate to shoot me an email, or leave a comment!