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For instruments that use an HPIB plotter, a Prologix USB-HPIB adapter and John Miles' 7470 program. Once the plot is in your computer you can then print it on any printer your computer works with, or

Congratulations Dick! It might be helpful to the rest of us to know the details of how you injected the cleaner. Did you drill a hole into the case? Or??? Cheers! Greg

What do you use to record outputs from HP test equipment? I have two plotters (7045B single & 7046B dual pen) but I simply use my camera to photograph the screen. The thought of ink and paper is a

Found that a new Bourns 10 turn pot is rather expensive so took the risk of injecting a little jungle juice into it. Now the 8558B is back to normal. I love simple faults. Dick G4BBH

Bang on Greg. Slid the plug-in forward and measured the pot as it is very easy to access. Looks as if I will have to locate another. It looks like a standard Bourns 10 turn job but will consult the

Noisy / Intermittent / Bad tuning potentiometer? -Greg

I have an 8558B which becomes totally unstable if the centre frequency is set above about 1250MHz at any span setting. If the span is sufficiently wide it is clear that the SA it is covering perfectly

Hi Dickson, Yes, my attenuator board has the Rev C part number as you surmised below. However the exposed circuit traces appear to be gold plated. The serial number of my unit starts with 1748A13xxx,

You might try Tanner Electronics in Dallas. Jimmy Tanner used to carry many of the old logic families, and he might still have some around. I think he still has a website, but you will have to phone

ops, then the cross reference floating around on the internet isn't at all accurate. You can try the NTE8374 equivalent or try to adapt a CD4511 (which is BCD latch/decoder/driver, you'd need to make

And again ... they are available "over there" !! 73, Dick, W1KSZ

According to the 436 manual, 1820-1361 is a Fairchild 9374DC. From the schematic it looks like some BCD to 7 segment decoder. Quite a different beast then the 75491 which seems to be just 4 drivers.

There are two listings for the SN75491 over on the "evil empire". 73, Dick, W1KSZ

Hello, From the cross reference I have, it's reported as equivalent to SN75491 display driver. Best regards Frank

Only if the pulses are all similar time scale. Not enough info to say. If the second pulse is after enough time that all has gone back to steady state quiet, no more current flowing, then the 2nd

I guess no one is interested in these, as I've gotten no offers. If I don't sell them here for a small price, later in the week I'm going to list them on ebay. They seem to fetch a rather ridiculous

This is a new, unused current shunt with the following specs: DC - 1 kHz +/- 0.3 % 1 kHz - 5 kHz +/- 5.0 % 15 amp: Continuous 30 amp: 15 minutes Max Priced at $ 50 includes shipping within the U.S.

I have a set of cards 1 and 2 (missing card 3 of 3) of the HP 85672A Spurious Response Measurement Utility for use with the following spectrum analyzers: 8560A/E 8561A/B/E 8562A/B/E 8563A/E 8564E

Hi Group, I've got a HP436A with a defective LED display decoder IC (A1U1...U4 - all same type of chip). Only 1 IC is bad, the others are fine. I can't seem to find a replacement or substitute. Does

If you solve this riddle, I would like to get some as well. Joe