Archive of the former Yahoo!Groups mailing list: MOTM

----- 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
>
>
>
>
>
>
>
>




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