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Mike, Unless I'm badly informed (again), the characteristic impedance of free space simply reflects the physical constants for permeability & permittivity of free space & nothing more glorious than

Hi, I am looking for the Controller Assembly, A60, for this instrument; a Hewlett-Packard 3586C Selective Level Meter, serial number 2511A019xx. It is in the second slot from the right hand side of

Greetings, I spent 46 years as an electronic technician without knowing free space had an impedance of 376.7 ohms. How did that happen? Jerry Mike <erazmus@...> wrote: Hi Guys, Apologies for

Agilent have a document, "Choosing the Right Power Meter and Sensor". Part of this document is called: "Understanding sensor technologies" You can download this from:

Hi Jerry, I (also) wish I understood fully but, based on equations of primitivity/permeability of free space and has been used practically (afaik) in design of some rather high gain antennas, have to

Hi Guys, Apologies for the hugely off topic question but as you guys are so into RF (and its been a little quiet in last few hours ;) I was hoping someone might be able to answer a simple question,

Very new to power sensors and was wondering if someone had the time to explain a few things with me. 1)When and why would you select one type of sensor over the other? 2)Do both sensors work with the

Hi all, has anybody some service information, schematic of a HP117A VLF comparator ? Any help appreciated. Regards Antoon

Tks John You're quite right , of course.- I actually want info on the 2650A for making up a 'modern equivalent' for phaselocking an older klystron generator- the 620B, which covers 10 GHz OK. But in

i have found some very cheap sources of 30 pin and 36 pin genuine cinch solder eyelet connectors "some ever are genuine card extender types with terminals bent for card extender applications. i also

Hmmm, I might have one of those in the basement. What model number is it? I'll look & email you later. complained for then, Sadly, HP lost sight of the HP way. I know that many of us who were very

My reminiscing, I used to have two of these in my house, saved on the heating bill!

Dave, my boy. I never realised you needed a handbook for a 2650A, I have the very thing, right here in front of me. It is 1964 printing with the modification data to use various other mixers. The 934A

zebra strips go bad

Hey! hey! 'Nuff 'disparagement' for 8690s- still have and use one often! With a set of PIs from 100 KHz to 18GHz as well... But it surely IS heavy..... DaveB, NZ (Still after a 2650A synchroniser

It`s a Rohde & Schwarz VHF - UHF MESSEMPFANGER Test Receiver Model ESU 2, Number 252.0010.52 [further numbers are obliterated] Serial Number : 40.00138. [whew!] I have posted a photo of THE

My gosh! I wouldn't want one of those nowadays! But I suppose that was what I used before the two rack 8620/9845 based versions. I do recall an automated spectrum analysis system based on 141T's that

Which model? Or give us a photo of the unit so we can see which one! John

My gosh! I wouldn't want one of those nowadays! But I suppose that was what I used before the two rack 8620/9845 based versions. I do recall an automated spectrum analysis system based on 141T's that

Thanks to all who have replied. It seems that the "junction block" I mentioned may be worth concentrating on. The item in question consists of HP part numbers 00181-04101 COVER: HV CONNECTOR,