Hello guys, some time ago I have purchased for a small sum, an HP 8620C and a HP 86290B plug-in. Generator seems to work OK, but I have found a problem with...
I have a collection of HP extender cards, mainly for older kit I guess. There are probably about a dozen in all. If anyone is interested please contact me...
I hav2 a 8116a Pulse/Function generator that has no error messages, but the output fluctuates in offset, i.e., it produces a signal that does not change in...
Howard, What unexpected frequencies are you seeing on the SA, or is it just wideband noise? Pete Rawson [Non-text portions of this message have been removed]...
Hello Pietro, in case you will not be succesfull, some years ago we solved here a similar problem, I remember that our mechanic made a brass replicas of the...
Here is the list of cards I have. All are for really old equipment as far as I can tell. All are untested but look OK. 2* HP 88809F Rev A 03582-66532 1*HP...
... Hello Wojtech, your is a good help, very much appreciated ! If you can send me the pdf images of scales needed, would be great ! Yes, I can print them upon...
Hi to everyone in this group! I've just purchased a used HP8566B S/A without interconnecting cables HP p/n 85662-60093(coax) and 85662-60094. I have access to...
Hi Constantino, Check http://www.ko4bb.com/dokuwiki/doku.php?id=bus_cable_wiring_for_hp_8566_8568 This is a Wiki, so if the information is unclear or...
Hi Piero My 8620C does not have the correct scales although I do have a .jpg of the scales on my PC in France which I can send you when I get back. My...
Do you know guys, why are all the 8924C technical related things so hidden, like a ghost at midnight. As perhaps do you know, I have a week looking for the PS...
Just FYI, the 400,000th site visit to Sphere was: http://www.sphere.bc.ca/test/index.html Stephen Smith of Brisbane, Australia, and his goodie pack is on the ...
Pete, If you view a square wave output in a wide span, you see the fundamental with n level orders diminishing in amplitude as one would expect. These appear...
This may be normal behavior. The nth harmonic will have 20*log(n) dB more phase noise at any given offset. Put another way, the harm done by a given amount...
John - OK, I know I am getting old and forgetful, but, the Fourier transform of a square wave in the time domain is indeed a series of sine waves, inherently. ...
... As far as I'm aware -- being nobody's mathematician, to be sure -- the phase noise on any carrier still comes down to the ratio of the jitter period versus...
I'll have to think about this for a while. The problem of using the higher order harmonics from a square wave is that they diminish fairly rapidly as SinX/X....
Sure, but we're talking phase noise in dBc, which is independent of how strong each harmonic is. The absolute noise power would indeed decrease as the...
What I meant was that since their amplitude is too low, they would not be like a free multiplier. - Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 ...
The new/old-stock CRT for 141T's that I had offered earlier this week has been claimed. It will be delivered to its new home in Canada this weekend. My thanks...
Howard, I have two 8116A's and they don't do that (offset noise). The phase noise is not great, but when looked on the scope, the outputs are quite stable. The...
Last spring, there was a discussion of people still making vacuum tubes. A few years ago, Norm Krim, the pre-WW II developer of the Raytheon line of sub...
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