| Electronics > Projects, Designs, and Technical Stuff |
| I see Two Circuits/What circuit is best? (linear bench PS and know how) |
| << < (4/6) > >> |
| 001:
--- Quote from: bd139 on November 11, 2018, 02:24:04 pm ---Fair point. I’d clone an E3620A myself. Schematic here: https://www.eevblog.com/forum/testgear/agilent-e3620a-power-supply-no-schematic-available-says-agilent-support/ --- End quote --- Thanx! Why You prefer "A" instead "B"? How looks Your clone (for mechanical and thermo reasons)? |
| bd139:
There is no E3620B (yet) I haven’t cloned it myself but that’s where I would start. It would take a lot of experimentation to get it built though and would likely cost more than buying one anyway. If faced with the task I would probably buy a mastech and some big Zener diodes and a bunch of fuses to protect my circuit from the power supply :-DD |
| rstofer:
Is that multi-winding transformer used in the HP design actually available? I can't read the parts list in the .pdf (oddball viewer, I guess) so I can't see a part number. It would seem to me to be just as difficult to get that transformer into Antarctica as an entire power supply. I suppose an alternative would be multiple transformers. One question re: the first design: Could I realistically recreate the PCB? For me, the answer is no. I have neither the time nor the patience to take on such a project. |
| 001:
--- Quote from: rstofer on November 11, 2018, 04:23:49 pm ---One question re: the first design: Could I realistically recreate the PCB? For me, the answer is no. I have neither the time nor the patience to take on such a project. --- End quote --- It is simplest and lazy part of work ;) |
| not1xor1:
--- Quote from: bd139 on November 11, 2018, 02:24:04 pm ---Fair point. I’d clone an E3620A myself. Schematic here: https://www.eevblog.com/forum/testgear/agilent-e3620a-power-supply-no-schematic-available-says-agilent-support/ --- End quote --- IMHO the triac preregulator is an overkill for such a limited amount of power. A two winding transformer with a mosfet as a switch would have been more than enough. A couple of months ago I tested (just in the LTSPICE virtual world, where burnt silicon doesn't smell >:D) a similar design with MOSFET switches rather than triacs. The main problem is that it is hard to find a 3 winding transformer. I wonder how difficult it would be to unwind the secondary of a toroidal transformer and then rewind it in 3 separate parts . Large transformers are probably more manageable as they have a larger hole and require less turns per volt. |
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