Has anyone built a replacement power supply for a Zenith Z-110/120?

[thevowel]

The requirements are unusual - five different voltages! I'd like to use a modern power supply (Mean Well or similar) for the +5/+12v, but it would need a circuit to generate the +8/+16/-16v. I'd love to find that someone's already done that work so I don't have to.

From the Z-100 Technical Manual:

+ 5 VDC ~ 3% at 12 amperes maximum.
Including ripple, 2 amperes minimum.
Ripple: 100 mV peak-to-peak maximum.

+ 12 VDC ~ 5% at 5.2 amperes maximum with
+ 5 VDC load at 6 amperes.
Including ripple, 0.4 amperes minimum.
Ripple: 120 mV peak-to-peak maximum.

+ 8 VDC, +10%, — 5% at 8 amperes maximum.
Including ripple, 150 mA minimum.
Ripple: 120 mV peak-to-peak maximum.

+16 VDC, + 20%, — 10% at 1 ampere maximum.
Including ripple, 5 mA minimum.
Ripply: 150 mV peak-to-peak maximum.

— 16 VDC, + 20%, — 10% at 1 ampere maximum
at 5 mA minimum.
Ripple 120 mV peak-to-peak maximum.

 

[pbirkel@gmail.com]

Take a look at http://s100computers.com/My System Pages/The Box/The Box.htm for ideas. The associated Google Group history includes various discussions on this point. You can at least get +-16Vdc (or close enough, +-15Vdc) as a single SMPS.

Multi-voltage SMPS tend to get pretty pricey. Play around in the Mouser search mechanism for possibilities & ideas.

 

[thevowel]

Take a look at http://s100computers.com/My System Pages/The Box/The Box.htm for ideas. The associated Google Group history includes various discussions on this point. You can at least get +-16Vdc (or close enough, +-15Vdc) as a single SMPS.

Multi-voltage SMPS tend to get pretty pricey. Play around in the Mouser search mechanism for possibilities & ideas.

That's a great resource - thanks!

 

[pbirkel@gmail.com]

Good luck. Interested in what you come up with :-}.

 

[robdaemon]

The requirements are unusual - five different voltages! I'd like to use a modern power supply (Mean Well or similar) for the +5/+12v, but it would need a circuit to generate the +8/+16/-16v. I'd love to find that someone's already done that work so I don't have to.

I'm curious what you come up with - my Z-100 has a bad PSU. It mostly works until you try to take too much load on the +12V line for a hard drive. It doesn't put out enough juice to spin up an ST-251 (but it can spin up an ST-225)

I'm going to look at this article from the Z100 LifeLine and see if I can fix it: https://z100lifeline.swvagts.com/articles/Z100PowerSupply.pdf