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Date
How do I use these PSU output covers?
I have an HP 6674A PSU (normally 60 V 35 A), but mine with an option that increases the voltage to 70 V, but drops the current to 30 A. The output terminals should be covered by a cover, a photograph
By Dr. David Kirkby, Kirkby Microwave Ltd · #120241 ·
Re: 54615B Agilent Scope Amplitude Low When Measuring 120V AC
You don't necessarily need isolated probes, you just need to have isolation between you and the test setup. Please learn from my mistakes where I have fried probes and oscilloscopes. Here are some
By Neil Gruending · #120240 ·
Re: 54615B Agilent Scope Amplitude Low When Measuring 120V AC
As far as incorrect voltage, the 340V is pretty much spot on with the other oscilloscope, and the meter is a true RMS that is reading 120V AC. So you're thinking that this scope has an acceptable
By Bostonman <bostonman73@...> · #120239 ·
RF probe tip
So I was perusing the HPAK 6632B manuals and under performance testing it requires a "1:1 probe with an RF tip."? Elsewhere under PARD testing it says " Set the oscilloscope's bandwidth limit to 20
By MaxFrister · #120238 ·
Re: New member intro
Yes, there are some compatibility issues.? I have 1 pair of ears that won't work with the installed handles.? The cutout angle is too sharp.? These came extra in a bag with my 3456 meter and I was
By Chris Wilkson · #120237 ·
Re: Sample preparation for Impedance Analyzer
Thanks Vladan. That paper will be useful. I also found the manual for the modern Keysight 16196A (851422.pdf download) to be useful. Have you ever used the coaxial test fixture? It is coaxial as in 50
By peter bunge · #120236 ·
Re: [TekScopes] Removing the Adhesive From Hell
This discussion (which is also on another list) is helpful. I have an antique microphone which had masking tape on part of the outside. The finish is crinkle black. I could never get the adhesive off.
By Richard Knoppow · #120235 ·
Re: Sample preparation for Impedance Analyzer
Peter, Here (
By pianovt · #120234 ·
Re: [TekScopes] Removing the Adhesive From Hell
Hot water is simply amazing. Masking tape is a problem child. Its mastic starts out sticky, then progresses to gooey, and ends up dry and crumbly. I find that masking tape lets go if it is allowed to
By Chuck Harris · #120233 ·
Re: Sample preparation for Impedance Analyzer
Those donuts have two O/D sizes but a selection of I/D for the holes Are these actually sample holders for the two sizes: 7mm diam x 20mm length 10mm diam x 20mm length (Outer Diameter and Inner
By peter bunge · #120232 ·
Re: [TekScopes] Removing the Adhesive From Hell
Heat makes solvents (like water... the so called 'universal solvent') dissolve compounds more completely. Yes... it's obvious; but, IMO it's underutilised, as a cleaning method. Just hot water and
By Roy Thistle · #120231 ·
Re: Sample preparation for Impedance Analyzer
Thanks Dave; I found an Operation Note for the HP 16091A Cavity test fixture. It does not explain how to use it. There are a couple of vague paragraphs in the HP 4191A manual (page 3-50 in mine) but
By peter bunge · #120230 ·
Re: 54615B Agilent Scope Amplitude Low When Measuring 120V AC
Robert makes a good point. Totally isolated equipment is safer for line voltage measurements. [email protected]> wrote: Jeremy Nichols Sent from my iPad 6.
By Jeremy Nichols · #120229 ·
Re: 54615B Agilent Scope Amplitude Low When Measuring 120V AC
A suitable probe is https://uk.farnell.com/pico-technology/ta044/probe-active-differential-hi-volt/dp/1667349 A simple accidential reversionof line and neutral with a standard probe will result in any
By Robert G8RPI · #120228 ·
Re: Help diagnosing 8593E possible YTO failure
I purchased a YTO from them and worked ok. I recommend to check the rest of instrument prior to change the YTO. This instrument perform a pll lock each sweep. If for any reason it fails a residual fm
By Patricio A. Greco · #120227 ·
Re: Help diagnosing 8593E possible YTO failure
Hello Nick, I've good experiences with testcalinstruments on ebay, also another colleague in our institute. Both YTOs we've purchased are running without any further issues - both of them are rebuild
By Dr.-Ing. Stephan Massner · #120226 ·
Re: Help diagnosing 8593E possible YTO failure
Vladan, Thanks very much for the input. I've driven the coil with a bench supply in current-limiting mode, but my supply just isn't accurate enough to avoid significant drift and noise in the YTO
By Nick Foster · #120225 ·
Re: Help diagnosing 8593E possible YTO failure
Nick, I don't see enough evidence yet to agree that the YTO is defective. You say that the noise comes in bursts and that it's FM noise. This is not typically how a failed YTO behaves. It may be bad,
By pianovt · #120224 ·
Re: Help diagnosing 8593E possible YTO failure
<patricio_greco@...> wrote: Thanks Patricio. Given that the problem occurs well before the synthesizers in the signal chain I'm going to go ahead and chalk this one up to a bad YTO.
By Nick Foster · #120223 ·
Re: Replacing missing button cap(s) - HP 339A
If the offer for a button does not work out, the HP part number for the button is 5041-0117 and the HP description is "Key Cap, Filter switch." It's a long shot but I have had success in the past by
By Tom Phillips · #120222 ·