comparison: content/LPD422FM.rst
content/LPD422FM.rst
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| 10 supply I bought on ebay a few weeks ago for something like 40€. | 10 supply I bought on ebay a few weeks ago for something like 40€. |
| 11 | 11 |
| 12 .. image:: {filename}/images/lambda/lpd422fm_overall.jpg | 12 .. image:: {filename}/images/lambda/lpd422fm_overall.jpg |
| 13 :alt: The Lambda LPD 422 FM dual regulated power supply. | 13 :alt: The Lambda LPD 422 FM dual regulated power supply. |
| 14 | 14 |
| 15 It's an old unit, not sure exactly it's exact age, but the components | 15 It's an old unit, not sure it's exact age, but the components inside |
| 16 inside the unit seem to hase date codes around 1971/1972. So my unit | 16 the unit seem to have date codes around 1971/1972. So my unit is |
| 17 is probably from the late 1972. (One of the available user manual on | 17 probably from the late 1972 (older than me!). This series of power |
| 18 the internet seems to be dated from 1987n but it's for the "A" | 18 supplies seem to have been built for a very long period, since one of |
| 19 version.) | 19 the available user manual on the internet seems to be dated from 1987 |
| 20 (but it's for the "A" version). | |
| 20 | 21 |
| 21 Overview | 22 Overview |
| 22 ======== | 23 ======== |
| 23 | 24 |
| 24 It's a dual regulated linear power supply which specifications are: | 25 It's a dual regulated linear power supply which specifications are: |
| 144 .. image:: {filename}/images/lambda/DS1Z_QuickPrint13.png | 145 .. image:: {filename}/images/lambda/DS1Z_QuickPrint13.png |
| 145 :alt: Ripple voltage of the LPD422FM connected to the ZPB30A1 - 20V/1A | 146 :alt: Ripple voltage of the LPD422FM connected to the ZPB30A1 - 20V/1A |
| 146 | 147 |
| 147 It's quite out of spec: ripple should be less than 500µVrms and | 148 It's quite out of spec: ripple should be less than 500µVrms and |
| 148 1.5mVpp, but it's not really a surprise considering the age (over 40 | 149 1.5mVpp, but it's not really a surprise considering the age (over 40 |
| 149 years old!) of the PSU. A future recap may improve its performances to | 150 years old!) of the PSU. A future recap may improve its performances |
| 150 its original specifictions. | 151 back to its original specifictions. |
| 151 | 152 |
| 153 I also plan to replace the banana jacks on the front panel (their | |
| 154 barrels are very short, less than 1cm: I cannot plug a standard banana | |
| 155 plug more than half its lenght). I may also try to bring the remote | |
| 156 sensor plugs on the front panel (with a pair of easy to set or remove | |
| 157 jumps): I like to have the sense terminals ready to use. | |
| 152 | 158 |
