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2004-10-16 by groovyshaman@snet.net
I wanted to confirm a few things: 1) pin 1 = +15 pin 2 = GND pin 3 = GND pin 4 = -15 pin 5 = digital GND pin 6 = +5V is the correct spec for the new MTA-156 power connector. 2) I have two supplies, a 5V and a +-15V. The grounds of the two supplies should be connected together as close to the supplies as possible. 3) 12AWG or 14AWG? 4) Once completed, crack open beer. ?? George
2004-10-16 by Paul Schreiber
Correct all down the line. Especially the beer part. Paul S. ----- Original Message -----
From: <groovyshaman@...> To: "motm group" <motm@yahoogroups.com> Sent: Saturday, October 16, 2004 10:05 AM Subject: [motm] adding 5V power to existing system > > I wanted to confirm a few things: > > 1) > pin 1 = +15 > pin 2 = GND > pin 3 = GND > pin 4 = -15 > pin 5 = digital GND > pin 6 = +5V > > is the correct spec for the new MTA-156 power connector. > > 2) I have two supplies, a 5V and a +-15V. The grounds of the two supplies > should be connected together as close to the supplies as possible. > > 3) 12AWG or 14AWG? > > 4) Once completed, crack open beer. > > ?? > > George > > > > > > Yahoo! Groups Links > > > > > > > >
2004-10-16 by J. Larry Hendry
----- Original Message -----
From: Paul Schreiber <synth1@...> Correct all down the line. Especially the beer part. Paul S. From: J. Larry Hendry <jlarryh@...> I'm going to add a couple of comments: There is little difference between 12 and 14 AWG. I used 12 where I could get what I wanted and 14 where I had to. In the 5 row cabinet shown at AHMW, one supply was used to feed all distribution boards. Voltage drop to the most distant distribution PCB = 0.01 volts. For triple voltage supplies run two ground wires from the PCB to the power supply common connection -- one from the already common on the PCB 15V grounds and a separate wire from the digital ground. I hate calling these grounds. To me they are neutrals (sometimes called common on the power supplies). Whatever you call the wire, you need 2 of them, connected together at the power supply end and NOT at the PCB end. If you have separate supplies, bond the cases, and connect both cases to earth ground only of the incoming AC cable. This is separate from any and all DC grounds. I will add power supply wiring to my "order of the universe" list. I learned these in life (mostly by screwing them up): Life planning rule: Correct order: 1. School 2. Marriage 3. Babies Incorrect order: all others House buying property rule: Correct order: 1. Road 2. House 3. Creek Incorrect order (my house): 1. Road 2. Creek (with bridge) 3. House Power supplies: Correct order: 1. wiring 2. testing 3. beer Incorrect order: beer first Larry, still just a Stooge who got his most recent college degree while his kids were already in college. ----- Original Message ----- From: <groovyshaman@...> To: "motm group" <motm@yahoogroups.com> Sent: Saturday, October 16, 2004 10:05 AM Subject: [motm] adding 5V power to existing system > > I wanted to confirm a few things: > > 1) > pin 1 = +15 > pin 2 = GND > pin 3 = GND > pin 4 = -15 > pin 5 = digital GND > pin 6 = +5V > > is the correct spec for the new MTA-156 power connector. > > 2) I have two supplies, a 5V and a +-15V. The grounds of the two supplies > should be connected together as close to the supplies as possible. > > 3) 12AWG or 14AWG? > > 4) Once completed, crack open beer. > > ?? > > George > > > > > > Yahoo! Groups Links > > > > > > > > Yahoo! Groups Links
2004-10-16 by groovyshaman@snet.net
Heh - thanks guys. Beer is on ice until job is complete. One other thing.. any good links to cheap 12/14AWG wire? This crap is expensive! George PS: Larry, your Life Planning Rule is so 80s! :) ----- Original Message ----- From: "J. Larry Hendry" <jlarryh@...> To: "motm group" <motm@yahoogroups.com> Sent: Saturday, October 16, 2004 11:42 AM Subject: Re: [motm] adding 5V power to existing system > > ----- Original Message ----- > From: Paul Schreiber <synth1@...> > Correct all down the line. Especially the beer part. > Paul S. > > From: J. Larry Hendry <jlarryh@...> > I'm going to add a couple of comments: > > There is little difference between 12 and 14 AWG. I used 12 where I could > get what I wanted and 14 where I had to. In the 5 row cabinet shown at > AHMW, one supply was used to feed all distribution boards. Voltage drop to > the most distant distribution PCB = 0.01 volts. > > For triple voltage supplies run two ground wires from the PCB to the power > supply common connection -- one from the already common on the PCB 15V > grounds and a separate wire from the digital ground. I hate calling these > grounds. To me they are neutrals (sometimes called common on the power > supplies). Whatever you call the wire, you need 2 of them, connected > together at the power supply end and NOT at the PCB end. > > If you have separate supplies, bond the cases, and connect both cases to > earth ground only of the incoming AC cable. This is separate from any and > all DC grounds. > > I will add power supply wiring to my "order of the universe" list. I > learned these in life (mostly by screwing them up): > > Life planning rule: > Correct order: > 1. School > 2. Marriage > 3. Babies > Incorrect order: > all others > > House buying property rule: > Correct order: > 1. Road > 2. House > 3. Creek > Incorrect order (my house): > 1. Road > 2. Creek (with bridge) > 3. House > > Power supplies: > Correct order: > 1. wiring > 2. testing > 3. beer > Incorrect order: > beer first > > Larry, still just a Stooge who got his most recent college degree while his > kids were already in college. > > ----- Original Message ----- > From: <groovyshaman@...> > To: "motm group" <motm@yahoogroups.com> > Sent: Saturday, October 16, 2004 10:05 AM > Subject: [motm] adding 5V power to existing system > > > > > I wanted to confirm a few things: > > > > 1) > > pin 1 = +15 > > pin 2 = GND > > pin 3 = GND > > pin 4 = -15 > > pin 5 = digital GND > > pin 6 = +5V > > > > is the correct spec for the new MTA-156 power connector. > > > > 2) I have two supplies, a 5V and a +-15V. The grounds of the two supplies
> > should be connected together as close to the supplies as possible. > > > > 3) 12AWG or 14AWG? > > > > 4) Once completed, crack open beer. > > > > ?? > > > > George
2004-10-16 by John Loffink
The quickest and cheapest source for 12/14 AWG wire is your local auto parts store. You can also find most of the FAST-ON type connectors there. John Loffink The Microtonal Synthesis Web Site http://www.microtonal-synthesis.com The Wavemakers Synthesizer Web Site http://www.wavemakers-synth.com
> -----Original Message----- > From: groovyshaman@... [mailto:groovyshaman@...] > Sent: Saturday, October 16, 2004 3:04 PM > To: motm group > Subject: Re: [motm] adding 5V power to existing system > > > Heh - thanks guys. Beer is on ice until job is complete. One other > thing.. any good links to cheap 12/14AWG wire? This crap is expensive! > > George > > PS: Larry, your Life Planning Rule is so 80s! :) >
2004-10-17 by Richard Brewster
Yup. Got my power supply distribution wire at Advance Auto Parts. Maybe I'm just paranoid, but I don't trust hand-crimped spade lugs. I crimp by hand and then solder 'em. If I had an industrial quality crimp tool I might have a different outlook. All I have is the "squeeze hard and hope for a good connection" kind. -Richard Brewster John Loffink wrote:
>The quickest and cheapest source for 12/14 AWG wire is your local auto parts >store. You can also find most of the FAST-ON type connectors there. > >John Loffink >The Microtonal Synthesis Web Site >http://www.microtonal-synthesis.com >The Wavemakers Synthesizer Web Site >http://www.wavemakers-synth.com > > > > >>-----Original Message----- >>From: groovyshaman@... [mailto:groovyshaman@...] >>Sent: Saturday, October 16, 2004 3:04 PM >>To: motm group >>Subject: Re: [motm] adding 5V power to existing system >> >> >>Heh - thanks guys. Beer is on ice until job is complete. One other >>thing.. any good links to cheap 12/14AWG wire? This crap is expensive! >> >>George >> >>PS: Larry, your Life Planning Rule is so 80s! :) >> >> >> > > > > >