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Hi all, As rarely happens there is some HP equipment (an 8712 vna and a hp3586) for sale here in Australia. See the https://vkclassifieds.net.au/ website. Regards, Waz

As one of the memebers of the comittee on purchase strategies at the university where I worked, I was able to add a rule that: No instrument with other than perpetual licenses for the features

[email protected]> wrote: Have Keysight actually gone as far as disabling features you have paid for unless you pay an annual fee? I would never buy an instrument like that. I am somewhat more

Two approaches: 1. Keep your old VNA 2. If you absolutely *need* an upgrade for some real reason, obtain a used VNA that's new enough to have the capabilities that you need, but old enough to not have

I'm considering purchasing a new VNA, which is a pretty hefty outlay. However, i'm amazed also at the high annual costs of the node-locked perpetual licences. Apparently, these also cover software

That is possible, but as I don't have extender cards it is a slow process involving tack soldering on a wire or two to make the measurement.? Per my other recent post, I believe there is a single

Thanks for the ideas. I have checked all PS rails and they are all good and steady and well within spec.? I have measured them at the PCB card edge connectors on the motherboard and all look good. I

HP gear had best-in-class specs and stability.? As parts inevitably change characteristics with temperature, the high airflow made the best of it by minimizing hotspots.? If you are always going to

I have found that many "used" units have been run continuously in racks or labs and the fans are often very noisy. I recently got a Racal counter/times where the fan was deafening.? I found a near

Only the first one. After that the group was doomed by it's own products. Oddly enough, my desktop PC is an ex-business Hp because I've found them much quieter than Dell and the like.

HPs cooling engineers must all have shared the same hobby: deafening rock music. My bet is they were all working from the same, kinda horrible, environmental specs, e.g. 55 ambient temperature. That,

Having experienced that supply bypass components in modules and on PCB's such as inductors or resistors (Allen Bradley carbon resistors in particular) can go bad, I would recommend checking all supply

Hi Peter. Sounds a bit suspicious, multiple issues all at the same time. As you had (and fixed) one one PSU issue, unless you have already checked the other PSU output rails, I'd suggest you do that,

Hi Hendrix, I repaired one of those (actually the type with VFD display). Don't yours have a temperature controlled fan? HPs cooling engineers must all have shared the same hobby: deafening rock

The following items have been added to the Files area of the [email protected] group. * /All HP, Agilent and Keysight instruments in folders by part numbers/3000 to 3999/3478A

I purchased this HP6645A power supply from Radu Dicher about a month ago and have been a bit slow getting it set up for use due to my other obligations. It's exactly as advertised, appears to work

S/N of the signal generator is 3623A01683 circa late 90's, LCD display.? Options Rev Pwr.? Worked swell for a decade. S/N of attenuator is 06102 Original symptom was output dropping 40 dB (with an

The unlock is due to the A7 module.? The problem seems to be in the 300-500 MHz oscillator.? Using the W1 jumper to set it to the low and high frequencies is supposed to give a 300 MHz total range

Update: The +15 issue turned out to be a bad adjustment pot. Replaced and it looks good now. Beginning to lose faith in old HP gear. The oven oscillator first had no output. Dirty power connector to

?Thanks. I’m pretty confident two RAM chips are bad as when I move them the reported fault moves with them. I just discovered that I cannot adjust the +15 supply and it is at the high end of