Hello to all, After washing or cleaning old HP vinylized panels with soap/water, 409, Windex, Awesome, or stronger if required for label removal, I use a...
Rather than a plastic rod, use a length of plastic tube, you can keep far away from mains (and other voltages) and still hear odd noises, plus you can see...
Hi all. I have two 8558B plugins. The older one has BW filter issues above 100khz, the newer one has RBW Switch issues, other than that, they are both...
The 5345A has LEDs. Perhaps you're thinking of its predecessor, the 5245L. I'll open it up and see if I notice any additional shielding. The side panels have...
I have one of these, too.  (Actually I have three of these beasts).  Old, ancient, heavy, and needing a mess of plug-ins. (I have most of them.)  I...
Does anyone know what option H25 is on a 5345A counter? There's a tag that is partially unreadable on the filler plate that covers the hole for the Opt...
Hi Peter I think you will require both plugins to get any traces on screen on a 141T display unit. They do appear on eBay but I havent seen any come up in the...
Hi I have just got hold of an HP 171t spectrum analyser for my next project, but it is minus an IF section. Before I can even start to look at the display unit...
I have found that two (sometimes 1, sometimes 3) passes in the dish washer do the best job, scrubbing with various solvents have been mediocre to unsuccessful...
Impedance mismatch - as in power reflected from the secondary back into the primary? Hadn't thought of that as a source of transformer noise. Thanks for the...
It's probably the plasticizer. Try a non-polar solvent, like lighter fluid or mineral spirits or xylene. They are flamable, so do it outside. The solvents may...
I have found that the side and bottom panels of much of my older HP gear start to ooze a sticky layer. In the past I have cleaned that up with rubbing alcohol...
... Ed and Garyapple, my question arose from the following: 1 º) HP noted in his day to the HP-8444A opt59 TG as a compatible accessory for the HP-8590A SA. 2...
i have a 8487D sensor i received from customer, this sensor works ok up to 48GHz but failed VSWR above 48GHz, so its a great sensor for ham radio work but its...
normally those diodes are inside the YTF/Mixer , replacing them is theoretically possible but will require acess to bonding equipment! you will have to remove...
Experience with these units tells me that if you performance test the unit you will find something that does not meet specification (probably load regulation)....
Parker Take off the covers and then try the old "auto mechanics stethoscope" trick of placing a long screw driver on the engine in various places while...
The manual scan on the 8444 is simply a ten turn pot that delivers a 0 - 10V output from the Scan Output BNC. That voltage is then connected into the external...
Been reading about the 60/120 Hz noise. My triac-regulated 6274B makes plenty of audible line-frequency (and probably harmonics) sound. It doesn't have a...
Thanks to all for your experiences. I do of course realize that the firing of a triac in series with the primary of a power transformer is abrupt, and that...
The 8743/8745/8746 et.al. have their available APC-7 reference extensions. Is there any reason that one cannot simply use a pair of APC-7 adapters and whatever...
The manual scan capability should depend on the SA - the TG just reconstructs the center frequency from the signals provided from the SA. You have to be sure...
The question seems a bit silly since the TG 8444A opt 59 provides manual scan but I can not see it working with the 8590A SA. My intention is to go looking...
