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Scope Tube Rejuvenation...
Hello all... I have been a member here for awhile, but haven't had anything to say constructive to any of the topics discussed, even though I use a large number of HP instruments in my work. As such
By Mark · #8893 ·
Circular Polarisation in Waveguide
Lothar There are number of ways of doing this, but at 36GHz there's a rather more limited number of choices. Techniques such as the use of coax hybrids are definitely not usable, and the septum
By Chris Bartram <yahoo@...> · #8892 ·
Re: Circular polarization antenna question
Septum feed is going to require some smart machining at 36GHz - the diameter of the waveguide is around 0.71 lambda - haven't done the sums for 36G, but at 10G thats just about 20mm. You'll also have
By dave powis <g4hup@...> · #8891 ·
Re: 419A Chopper Replacement
deane kidd who has tektronix parts might have the neon bulbs you need
By arthurok · #8890 ·
Re: Circular polarization antenna question
I take it you`ve tried "The ARRL Antenna Book"? Cheers!,........................................................Don C.
By Don Collie <donmer@...> · #8889 ·
Re: Circular polarization antenna question
I know how it's done at 150 MHz. Maybe you can adapt it to 36 GHz. It's done with a hybrid ring made out of coax. Three sides are 1/4 wave and the fourth side is 3/4 wave. Feed the two antennas to
By MAX · #8888 ·
Re: Circular polarization antenna question
Another lead from a local ham: For the guy looking for the circular pol horn info Try the W1GHZ on line microwave antenna book http://www.w1ghz.org/antbook/contents.htm His best bet is the
By J Forster <jfor@...> · #8885 ·
Re: 419A Chopper Replacement
I remember NE2-D and NE2-J as well as the NE2; different wattages, IIRC. Harvey
By Harvey White <madyn@...> · #8887 ·
Need cross for HP 1901-1096 PIN diode
Can someone help me with a cross for this please; HP 1901-1096 PIN diode. It is not listed in th ereferences I found on line. Thanks! David.
By David Woodhead · #8886 ·
Re: Circular polarization antenna question
i dont have any of those books on hand, i never had much interest in antennas so i got a bunch of other books and periodicals but nothing on antenna stuff J Forster <jfor@...> wrote:
By lothar baier <microwaveengineer1968@...> · #8884 ·
Re: Circular polarization antenna question
Have you looked at some of the old standard books like Kraus or the Rad Lab series? I'd at least start there. Then perhaps the IEEE Antenna & Propagation (or whatever it is actually called) The web is
By J Forster <jfor@...> · #8882 ·
Re: Circular polarization antenna question
Have you tried Paul Wade's W1GHZ on-line antenna handbook? I am afraid I dont have a clickable link. Amateur EMEers use circular polarization I believe. Alan G3NYK
By Alan Melia · #8883 ·
Circular polarization antenna question
Ok guys this is not directly related to agilent t+m but im banging my head on the wall with this ! Im looking for material on how to design and build a turnstile polarization converter, i googled up
By microwaveengineer1968 <microwaveengineer1968@...> · #8881 ·
11792 and 11722A repair !
If you have a 11722 or 11792 thats bad, you can use the cartridge out of a 8482A to fix a 11722A or a 8485A cartridge will work for the 11792A !
By microwaveengineer1968 <microwaveengineer1968@...> · #8880 ·
DIY Build yourself a 8487A !
8487A are still quite expensive on ebay, usually the go for $1200-1700 money i didnt wanted to spend so i was looking for a alternative. Taking some sensors apart while working in the lab of a T+M
By microwaveengineer1968 <microwaveengineer1968@...> · #8879 ·
DIY: Repair of HP Step Attenuators
Since Agilent continiously ups the spare part prices and discontinues parts it has become more and more important to go past normal repair practices. Step Attenuators for example can be repaired
By microwaveengineer1968 <microwaveengineer1968@...> · #8878 ·
Re: 419A Chopper Replacement
Or ask on the NEON-NIXIE Yahoo group, a lot of expertise and experience there too. John
By John Day <johnday@...> · #8877 ·
Re: 419A Chopper Replacement
I don't know about the alignment. My experience was with the opto-chopper in the 410C. Mine was replaced as a unit by the company cal lab. There are only a very few wire pigtail Ne's made. I think
By J Forster <jfor@...> · #8876 ·
Re: 419A Chopper Replacement
That was my first impulse; however, the manual (paragraph 5-27) states that "physical alignment and selection of the neon bulbs are critical" and that replacement of the entire assy is the only thing
By tertiary_42 · #8875 ·
Re: 419A Chopper Replacement
Many Ne bulbs have minute amounts of radioactive material in them to stabilize the firing point. As the radioactive emission rate decays, the bulbs become erratic. Put in new bulbs, if you
By J Forster <jfor@...> · #8874 ·