Ordering latches from Parts Express

December 2nd, 2005

UPDATE: replacement latches for the Mark V can be found here: http://www.dblittle.com/catalog/product_info.php?cPath=29&products_id=108

I found a dealer of Penn Fabrication parts, who is willing to order the replacement latches for my Rhodes Mark V piano. This is great, because Penn Fabrication had a minimum order restriction of $75. Parts Express has been very responsive to my requests for these parts. Also, if you have a Rhodes Mark V that needs replacement latches for the case lid, this is the only source that I have found that can get adequate replacements.

Once I recieve the latches and get them installed, I’ll take some pictures and post them.

Regarding information in an entangled system

December 2nd, 2005

I was reading a bit more about quantum entanglement, while thinking about my previous post and came across a quantum entanglement webpage that had this to say:

Q: Can we use entanglement for instantaneous communications?
No. Current theories suggest that the information passed between particles in an entangled system must remain a secret. However, experiments involving the decay of radioactive particles may hold promise for detecting when one half of an entangled pair has changed

But….the author also claims:

Unlike the static nature of the web pages presented here, quantum physics is ever changing. Physicists are confronted with problems that will take many iterations, many years, to solve. Scores of theories will be presented, some of them merely tweaking, while others radically alter, our perceptions of quantum nature.

Quantum Entanglement Followup

November 30th, 2005

I caught news that some folks have figured out a way to measure the quantum state of a particle, without affecting the quantum state. As I understand it, when one measures the quantum state of a particle, the act of measuring (or interacting) with the particle can change its quantum state. This would lead to unreliable measurements of a particle’s quantum state.

If these researchers have done what I think they have done, communication technologies should dramatically benefit. Consider the following:

  1. Entangle two particles (A and B).
  2. Put particle A into a device (device A) that changes its quantum states with variable frequency.
  3. Allow the frequency to be controlled by a microphone, so that the rate of changing quantum states is controlled by someone’s voice.
  4. Put particle B into a device (device B) that measures the changes in its quantum state, and amplifies those changes through a speaker.

This is similar to how a phone works, but the frequency is transmitted over wires and communication towers. What I think would be neat is that device A and B would be able to communicate at the speed of light, regardless of location, and without the need for a traditional service provider….you see, device A and B would communicate directly with each other!

Someone could be 1 mile underground in a Pennsylvania coal mine, and have a crystal-clear conversation with their friend in Australia, if they had such devices. In the same way, future astronauts in lunar orbit would be able to maintain communications even on the far side of the moon. The Mars Exploration Rovers would be able to communicate directly with operators on Earth without line-of-sight restrictions (or the need for orbiting relays).

Even better, the power consumption for long distance communications would be miniscule compared to the traditional RF transmissions. Consider the Voyager 1 spacecraft, which at the time of writing is 9,067,000,000 miles from Earth. Sensitive equipment on Earth is still able to receive communication signals from Voyager 1, even though they get weaker as the spacecraft distances itself from Earth. At some point in the future the Voyager 1 signal’s noise-to-signal ratio may be such that equipment on Earth won’t be able to “hear” the spacecraft. If Voyager 1 wanted to be “heard” it would have to “shout” louder, but the transmitter it has can only “shout” so loud.

If Voyager 1 had a particle entangled with one on Earth, then it could apply very little effort to change the quantum state of its on-board particle, and then we could measure the changes in our particle on Earth with no signal loss. No matter the distance, this type of communication would provide perfect reception.

Think about it.

Replacement latches for my Rhodes Mark V case

November 28th, 2005

UPDATE: replacement latches for the Mark V can be found here: http://www.dblittle.com/catalog/product_info.php?cPath=29&products_id=108

When I bought my Rhodes Mark V, some of the case latches which secure the lid to the piano were bent, or missing. I want to replace them, and I only found one source for the specific type of latch I need. Penn Fabrication calls it a “Medium Extrusion Mount Twist Latch“. Here is a diagram of it. Unfortunately, they only sell in orders over $75. Their consumer supplier doesn’t carry the latches either. So, for now, I’m going to try checking at our local hardware stores. I’ll let you know what I find.

Esspaul coming to a kitchen near you

November 15th, 2005

Ric, guitarist for Scribblin’, is totally psyched about starting the filming for Esspaul. He has offered the use of his kitchen for the filming of the pilot, and is already thinking of some great dishes for Paul to prepare.

I’m hoping Mark will be able to help with scene composition and lighting. I will be handling editing and pre/post mastering, as well as performing as Chef Paul’s personal minstrel; following him about the kitchen singing and obnoxiously clapping coconuts. Actually, I’m just going to sing the intro/outro theme song. (BTW-Paul, we need to write an outro.) But for now, we’ll be working on a storyboard. With the final product, we’d like to post it on the internet, but may seek corporate sponsorship and an eventual television series contract.

Buzz from my Leslie Combo Preamp and Leslie 145 Speaker

October 27th, 2005

I’ve been trying to track down the source of a loud buzz when operating my Leslie 145 in Fast mode. Slow mode sounds fine.

After a good cleaning of both the Leslie 147 amp and the Leslie Combo Preamp pedal, the noise was still there. I replaced the tubes in the Leslie and the noise still persisted.

I switched the AC plugs for the Fast and Slow motors, and found that the noise followed the circuit, and not the motors. After switching the AC plugs, the Leslie was noisy in Slow mode. With that knowledge, I switched the AC plugs back…and the Leslie was noisy in Fast mode again. So far so good. I figured it wasn’t the motors.

The relay and circuit for switching between Fast and Slow modes seemed to work fine. It was just very strange to me that the Speed circuit was affecting my Signal circuit.

I checked the connections on my 6-pin cable. During this, I had the leslie on and making noise in Fast mode, when I jiggled the 6-pin cable on the leslie. The noise went away! This is very strange. I investigate and find that the noise went away when pin 3 or 4 were not connected. This essentially was leaving the Speed circuit open, without having the Leslie Combo Preamp handle keeping the circuit open.

I thought something must be wrong with the Leslie Combo Preamp…at least the part that keeps the circuit open. But the wiring was so simple and everything looked fine. When the Speed circuit was closed, no noise. When it was open, there was noise.

In the open position, a small indicator light on that circuit lights up. In the closed position, it was not on. It was working properly, as far as indicating whether or not the Leslie was in Fast mode.

But I wondered, just out of curiosity, how it could be lighting up /and/ not completing the circuit. Lights, as far as I knew acted as a resistor in the circuit. I found that the light was a pilot light. I did some more research for “pilot light” on the web and found that, in some electronics, if a pilot light is not grounded, it can generate a 120Hz buzz.

A 120Hz buzz. That sounds like what I’m hearing. It is definately not a 60Hz hum! I removed the pilot light and the noise went away! Without the pilot light, the circuit was truly open. I will try grounding the pilot light at some point, but for now I can live without my speed indicator on the Leslie Combo Preamp.

Nice! Now I can cart this thing to the Scribblin’ gig this weekend! Yeeee Hawwwww!

Sweater Weather

September 21st, 2005

I heard some really good music the other day at UNC. Three members of Sweater Weather were playing in The Pit. They had a great sound. The vocals were schweeeeet!

Maybe they want to try singing and playing with a full band? Need a drummer, bassist, or keyboardist guys? :)

Change artist or album for multiple songs at one time in iTunes

September 14th, 2005

Well, well, well….
I’ve wasted countless hours renaming the Artist or Album name for CDs that weren’t in something like CDDB or Gracenote. Turns out iTunes allows you to edit fields for multiple tracks at one time. Here’s how:

  1. Select the multiple tracks (either Command+Click or Shift+Click) you want to edit.
  2. Click File->Get Info…
  3. This will bring up a window where you can mass edit those records.

Designing sets for playing in large venues

September 14th, 2005

I had some cool ideas for playing on stage. These are just the artistic renderings of those thoughts. You can click on all the images for a slightly larger image.

In this one, the lunch box will roll on stage and then open to reveal the band as they start to play. Note that the drummer is wearing a giant foam pickle. The other players might be a thermos and sandwich. I’m not sure yet. And yes, that is my sad attempt at duplicating a Lazer Tag lunchbox from the mid 1980’s. I should know. I owned one.
Lunch box closed
Lunch box open

Here, I thought it would be fun to have a medieval theme because I love D&D-like games and stories. I really like this one and it would require some sort of control surface from the back, where a tech could activate any one of the following “states” to go along with the music:

  • Night – brings up blue and purple lights, turns on the christmas lights in the rear, lights the moon, plays cricket sounds, and other things…
  • Day – brings up bright lights, and…. um….plays daytime sounds? wind? gulls? hahahahaha! that’s hilarious. I have no idea….
  • Siege – (during day or night) turn on fans behind tall grass to blow red/yellow/orange streamers up with backlighting and sound for a fire effect.

castle

This marionette one is a favorite. I had a fun time thinking about it. Basically, all the lights are on the puppets in front with the band playing music in the background. A system for the players to control the puppets would be crazy….right? So I think you would need puppeteers to do that work for you. Cool.
puppets

If you like these, and by some chance use these ideas, please take some photos and let me see it! That would be awesome. Or, if I ever build one of these I’ll post pictures here. Deal?

Vacuum Tubes for a vintage (1960’s) Ampeg Jet J12-T

September 14th, 2005

I’ve been searching the web for replacement tubes for my vintage Ampeg Jet J12-T. I was suprised to find that the recommended tubes on the web did not match what was printed on the inside of my Ampeg amp. Some folks on the web were saying that the amp only had 4 tubes (it really has 5) and they were saying that one would need (2) 12AX7 and (2) 7591 tubes.

So for anyone out there wondering, the documentation inside of the amp says this:

Tubes (from left to right):
6BK11 or 6C10
6C10
7591
7591
5Y3