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All information in these pages is copyright (c) 1989-2003 by Roger Nichols. All rights reserved. Permission for personal reference only, and may not be reproduced by any method without written permission.


Remembering The Good Ol' Days & Patching Things Up.

 

by Roger Nichols


When I was growing up, "There's a rumble down the street!" meant that there was a fight, usually between two rival car clubs. I was a member of the Quarter Kings of Ontario California and displayed my car club plaque in the back window of my blown, injected '57 Chevy. The rival car club at the time was the Forty Niners of Upland California. We never had any knock down drag out fights, but we used to drag race on back roads a lot.

Now days a rumble down the street means someone in a Honda Civic with the back seat full of subwoofers and the trunk full of amplifiers. A drag race probably refers to guys running in high heels and dresses. Times have changed.

Studios and studio equipment has changed, too. Dolby A noise reduction used to take up 7 rack spaces for each pair of channels, and now you can get 24 channels of Dolby that will fit inside the tape machine. Mitsubishi 32 track digital machines used to cost $160,000 and now used ones can be found for the same price as 32 channels of Tascam or ADAT. Many project studios have more tracks of digital audio than lots of commercial facilities.

In the category of outboard gear, I see two things happening. On one hand, we have more and more sophisticated outboard reverbs and signal processors getting ever more powerful. On the other hand we have a rising lust for old outboard gear that 10 or 15 years ago could be found in junk heaps and electronic salvage dealers. 15 or 20 years ago, Pultec, Langevin, API, UREI, Gotham, and similar marques branded the faceplates of outboard gear in most of the major studios. As newer gear came out, the old gear was replaced. It was not until the digital age that we realized what we really had in these junk heaps.

All of the early outboard gear was made with discrete components that were hand wired. Sometimes the components had to be hand selected to attain the desired performance. Many pieces of outboard gear utilized tubes instead of transistors. Tubes sounded different than transistors, and there were fans of both. Tube gear sounded warm, gave off plenty of heat in the winter and could always double as a boat anchor. Transistorized equipment ran much cooler, required less maintenance and took up less rack space. The war between tubes and ICs hasn't stopped yet.

Many pieces of vintage outboard gear added their own unique character to the sound. With digital recordings it was now easier to preserve this character on tape. Now it is easier to hear the difference between a $5000 tube mic preamp and a $500 tube mic preamp. It is also easier to hear the difference between a Pultec EQ and the "hot" EQ of the moment. When using tube compressors the operative word to describe the way it sounds is usually "nice".

The bottom line here is that as some people upgrade their studios to incorporate new whiz bang outboard gear, they may be throwing the baby out with the bath water. If they don't want the old UREI 1176 limiters or API EQ modules, maybe you can take them off their hands for a reasonable price. This doesn't happen all of the time, but I see it once in a while, usually when a friend of mine calls me up to brag about the Pultec he found in a pawn shop for $75, or the perfect U-87 for $40. Keep your eyes open. Check out out-of-the-way pawn shops and classified ads in those little weekly papers. Your studio full of quality used gear could be the envy of the neighborhood. If you run across something and you don't know what it is, e-mail me or ask on rec.audio.pro on the Internet. Somebody will know what it is. Don't tell them where it is, though, or it might not be there when you go back to get it.

Digital Patch Bay For Pennies, From Nichols.


How many of you wish you had a digital audio patch bay to route all those AES signals around? Raise your hand if you do. OK, now how many of you really raised your hand? YOU'RE READING A MAGAZINE! I CAN'T SEE YOU RAISE YOUR HAND.

I have a Z Systems 8.8 digital audio De-tangler. I have it hooked up to the eight most often switched pieces of digital gear. But there is always more gear than switch points. I could get the 16.16 or the 32.32, but then none of you would speak to me any more. So, I was rummaging around the used electronic junk house in Nashville and found a 10base-T Ethernet patch bay. It uses those connectors that are like the ones on the end of your telephone cord except they have eight pins (RJ-45) instead of four (RJ-11). This little patch bay had 24 connectors in it for $40. I could hook up 11 pieces of digital gear and have one connection to the Z Systems box.

At first I thought that digital audio through a telephone connector, but then I realized that this is the standard connector for connecting computers to Ethernet that has data rates of 10 megabits per second. If it is good enough for that, then it should be good enough for digital audio.

AES is actually a balanced signal. Pins 2 and 3 of the XLR carry the digital audio signal, so you really only need two pins worth of phone connector to do the job. I decided on the eight pins to thwart any potential bad patch connections. I connected pin 2 of the XLR to pins 1,2 and 3 of the RJ-45 jack, and pin 3 of the XLR to pins 6,7 and 8 of the RJ-45 jack. I now have three pins making the connection for each wire. Chances are a lot better of making a good connection. Half of the connectors are wired to male XLRs for output and the other half is wired to female XLRs for input.

For patch cords you can either buy Ethernet patch cords at places like Computer City or Comp USA, or you can make them yourself with some RJ-45 connectors, an RJ-45 crimper and some eight conductor Ethernet cable. I cut the wire into two foot lengths, crimped a connector on each end, and I was in business. Make sure the patch cords are wired straight thru, pin 1 to pin 1 etc.

I hooked the digital equipment that I do not use very often to the new patch bay and connected one of the jacks to the Z Systems box. It all works perfectly. Now I can connect anything to anything. The total cost of this little puppy was $125 including all of the XLRs. And what's even better is that now that I talked about it in my column, I can write it off. Cool, huh?

ED NOTE: If you want Roger to put more cool stuff on his Web page, you better check it out and leave him a note, or he will be really peeved! http://www.digital-atomics.com.




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