voltage regulators

[odysseybmx414]

ok thanks all

[mateo88]

Originally posted by AndrewT
Hi,
Mate88 in post8 gave some bad advice. No.

Connect the transformer centre tap to the smoothing capacitor common. connect a short wire from cap common to central star ground.

Do not connect anything else to the cap common.

Try to keep the routes from transformer to rectifier to cap to cap common to centre tap as ahort as practical. Also keep the area enclosed witin these loops as small as possible.

I'm not sure I follow what you are saying. I've always used the (+) from the negative rail regulator and the (-) from the positive rail regulator tied together for ground.

[AndrewT]

Hi mate,

The point where they connect you use as ground.

using the centre tap and cap common as ground.

the (+) from the negative rail regulator and the (-) from the positive rail regulator tied together for ground.

using the regulator common as ground.

I thought these were two different connection philosophies.

In my opinion it is OK to use the regulator common as part of the star ground. But you must not use the centre tap and cap common as a ground.

Have I misunderstood your first advice.

[mateo88]

I think I just wasn't clear in the first quote. I meant the same thing in both quotes (use regulator common for ground), but I didn't explain the first very well at all. Sorry for the confusion. Maybe I should stop using pronouns.