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Rifa caps are not happy with high voltages.? Could you adjust your solar panel inverter to only 240 volts? Harvey

I've been using these (from Amazon) for years. They work pretty well: AC Infinity Vented Cantilever 2U Universal Rack Shelf, 16" Deep, for 19” equipment racks. Heavy-Duty 2.4mm Cold Rolled Steel,

This is a better solution than mounting ears. It is probable that the ears alone will not properly support the weight of the gear. Glenn

Thanks Henning re *delta marker*. Been a while since I operated this SA. I just confirmed thats the level issue. Re *the cap across the mains* , that's what i suspected initially as I had it happen on

Forgot to mention, most gear should not be mounted only by the front ears or flanges - only the very lightest and shortest (front to back) items are safe this way. Sides and back support is needed for

I have a bunch of fairly heavy aluminum 90 degree angle-iron pieces scrounged up long ago. They are about 2" by 3/16" flats by 30" long, and easy to drill holes anywhere and attach with the usual

I have some of the front mount shelves but the cheap ones won't support the nice HP iron. They deflect too much. That picture was for the Mainframe SRS-4-F. I can get them at my local supplier in

I use equipment shelves that only mount from the front, but the one you show is better mechanically.? Where do you get them?? Do you have a part number? Pter

I have run out of floor and bench space and it's time start filling up the racks I have stored away. :-( Unfortunately most of the equipment does not have mounting ears. Last time I looked at them

It's a later one with the Rev B A2 board 00427-66512, connection pin 5 is also gone, the diode relabelled as CR2 (was CR1) goes directly from pin 8 to pin 11. Original A2 board is 00427-66502. David

Hello I am trying to get a 8720ES working. It has a CPU board fault. The CPU board start some but not fully. I get an error saying: Please stand by- Error INST This error I cannot find info on

Glenn, You have activated the delta marker function, so what is shown if the "normal marker" function is activated? My first idea on the big bang was an exploding RIFA cap on the AC mains input. Did

Probably so Paul. ?I do wonder if the lack of manuals for this particular version of the 427A is because it was a military/govt. version that is just now being phased out. ?Agree on the beat up

Leon I did look at the other site great pix and thats a nice looking meter. Normally gov stuff is pretty beat up. Suggestion. If the meter is off as little as you say does it make sense to simply use

If you are in 230V country sure I would bet on explosion of RIFA caps in the power supply. Not difficult to repair it, just power supply board needs to be removed from SA. Whe you are in, check also

Don't know that exact model, but could it be mains power I/P filter / Rifa line filter caps?

New member here. I have an HP 8560A? SA which had been in storage for some years. On powering it up recently it worked ok for about 10 minutes, then a loud bang and smoke came out........ not good.

I have the contents of the version 4.04 installation diskette. LINK HERE ( https://cloud.fastshare.cz/share/get/HVbmApM7mWv9ri4ObDxunrISeRtYyNX0W8bTymipUMzkXfP5iBzJPIBCwzB8mBIb )

I’d like to think so Paul. It sure would be nice to have a copy of the appropriate manual though to remove doubt. I also posed this question over on antique radios.com with some photos of the A2

The 1821A is very similar for the reset lamp circuit, the voltages are negative on the base, picture below is from the repair of my 1821A, the lamp had failed in that one. David