Mensaje originado el: 17/07/10 a las: 23:29 z

A LAB PSU




From: G8MNY@GB7CIP.#32.GBR.EU
To  : TECH@WW

Here is a circuit from Chrissi ZR6CPB.

  ZR6CPB PRECISION ADJUSTABLE LAB POWER SUPPLY Mark II  Low 3-15V 0-30A
                                                        Hi 15-33V 0-15A
                         +-----------------+----+----+----+----+----+
                         |                 |    |    |    |    |    | /
(Low Volatage)           |TIP3055 or 2N3055| x6 |    |    |    |    | /
(Hi Current)             |               | /c | /  | /  | /  | /  | / /
  |                      |             b |/   |/   |/   |/   |/   |/  /
                         |         +-----+----+----+----+----+----+   /
Low  Off  Hi-(Hi Voltage)|         |     |\   |\   |\   |\   |\   |\  /
  +-------+ (Low Current)|         |     | Ve | V  | V  | V  | V  | V
  |       |              | ------- |       |    |    |    |    |    | h
>-+-o o o-+              | |     | |       |    |    |    |    |    | e
Mains ^                  |  > O <  |       \    \    \    \    \    \ a
Live  |                  | |     | |       /    /    /    /    /    / t
      O  DP3T(Centre Off)| ------- |    0R2\ 0R2\ 0R2\ 0R2\ 0R2\ 0R2\ s
      |  Switch          | |     | |    5W / 5W /  5W/ 5W / 5W / 5W / i
<-----+                  | |L200 | |       \    \    \    \    \    \ n
Transformer Live         | |     | |       |    |    |    |    |    | k
                         | ------- |current|    |    |    |    |    |
                         | 1|||||5 |   1 K |    |    |    |    |    |
                         |  |||||  | /\/\/\+----+----+----+----+----+->
Transformer 12-0-12 15A  |  |||||  |   ^   |    |    |                +
+---------+-+  +---+-----+--+|+|+-++   |   |    |    |
\         | |  |   |     |   |||  |    |   |    |    |         3-33 V
/         | |  |   |     |   ||+  |    |   /    |    |
\ 12vRMS  - v  |   |     |   +|--------+   \    |    |         0-30 A
/         ^ _  |   |40v  |50v ||  |        /    |    |
\    Off  | |  |  +|4700u|0.1u||  | voltage\10K |   +| 4700uf
/ Low  Hi | |  | ----- -----  |+---------->/  ---- -----
+--o o o--+ +--+ /---\ -----  |   |        |  ---- /---\ 40v
/ct  ^    | |      |     |    |0.1|uf      |    | 0.1|uf  |
\    |    | | +<36v|     |    | -----      \    |50v |
/    O    v -      |     |    | -----      /1K  |    |
\12v |    _ ^      |     |    |   |50v     \    |    |
/RMS |    | |      |     |    |   |        /    |    |
\    |    | |   -  |     |    |   |        |    |    |                -
+---------+-+   +--+-----+----+---+--------+----+----+---------------->
     |          |
     +----------+
    ---  (ground)
     -
     .

DP3T switch with centre off - selects between LO, OFF & Hi.

Enjoy! From ZR6CPB@ZS0TFK.LIC.NWP.ZAF.AF

/QSL
73 De John, G8MNY @ GB7CIP