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Re: Lamps and Mains Lead for HP412A?
Thanks Bob.
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A very good range... 73, Mike ----- Original Message -----
From: n2cbh2000 To: hp_agilent_equipment@... Sent: Saturday, March 09, 2013 12:42 PM Subject: [hp_agilent_equipment] Re: Lamps and Mains Lead for HP412A? I have an HP411 which is an RF power meter with the same clock work motor and photo interrupter setup as I suspect the 412 has. I got replacement bulbs from a place on the Internet called Bulbtown. You might Google the name but they had all kinds of type 47 bulbs and the type that are used in the HP stuff. They even had the blue tinted bulbs used in my old Drake 4 line ham transciever. Bob N2CBH > > I've just acquired an HP412A & would like to find some replacement lamps for the choppers. > > > > They are a G4 base, 6.3v, 0.15A lamp. > > Digikey, Mouser, Farnell nor RS seem to have them. |
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Re: HP 8640B Troubleshooting help needed
Hi Bob,
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I'm glad you solved the problem. I'm about to fix my second HP-8640B that I had originally acquired as a parts unit and then I decided it was almost worth fixing it. These are great generators. Best 73 Frank IZ8DWF On Sat, Mar 9, 2013 at 2:59 AM, kn4hhptc <kn4hhptc@...> wrote:
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Re: Power on Time
Maybe some do, but I know the current PNA series of Network Analyzers do not....unless you count the hard drives. HDDs do keep track of the number of hours they are turned on; as well as number of power cycles. So I guess, you could say that most modern instruments do keep track. Of course, if you replace the HDD, that data is lost.
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I assume SSDs also keep track of the same info. --- In hp_agilent_equipment@..., "Susan" <susan@...> wrote:
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Re: Power on Time
laurens_db
I don't know about the OP's question, but the 856xE series definately had an elapsed hours count, possibly as the CRT has a finite life...
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--- In hp_agilent_equipment@..., "J. Forster" <jfor@...> wrote:
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Re: Power on Time
J. Forster
Hi Susan,
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HP only put timers in instruments that had things that were 'used up', like Cs beam standards, sweepers with BWO tubes, and so on. They used little Curtis (?) ETMs, composed of a capilliary filled w/ mercury and a drop of electrolyte. The position of the Hg gap was proportional to the A-H through the device. In newer stuff, there may be an ETM built into the software, but I don't know. FWIW, -John ============ Dear All, |
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Re: HP 8620C with 86222B-H69 rf plug in ( with a US serial number )
J. Forster
The number 6625-01-036 3730 is the NSN, National Stock Number, not serial.
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You should look for: The 86222B manual and the H29 Option -John =============== I have a old HP8620b with rf 86222B-H29 plug in probably made specially |
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Re: CRT Needed for HP 54520A Scope
Dan,
Once you get the cathode emitting again, you can "wash" away some of the burnt marks by equalising(actually wasting) away surrounding areas. This will help to lighten the burnt- areas but not removing them. Why don't you try rejuvenating first. Good luck. cslim On Sat, Mar 9, 2013 at 9:48 PM, danaz.chandler <djn@...> wrote:
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Re: CRT Needed for HP 54520A Scope
Mark Gulbrandsen
I meant to say 54520! Apparently that range of HP scopes all use the same CRT. I have a 54520 here that I use occasionally....
Mark On Mar 9, 2013, at 7:20 AM, Mark Gulbrandsen <cinerama84106@...> wrote: There is a CRT distributor on ebay called "newtubes" that has New 54502 crt's They show one listed that fits your scope and is $195.00.. Also looks to be a normally stocked tube for them. I hope this helps... [Non-text portions of this message have been removed] |
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Re: CRT Needed for HP 54520A Scope
Mark Gulbrandsen
There is a CRT distributor on ebay called "newtubes" that has New 54502 crt's They show one listed that fits your scope and is $195.00.. Also looks to be a normally stocked tube for them. I hope this helps...
Mark Gulbrandsen Salt Lake City On Mar 9, 2013, at 6:48 AM, "danaz.chandler" <djn@...> wrote: Thanks for the idea. I may try to rejuv the. However, my main complaint is the deep burn the glass shows.. [Non-text portions of this message have been removed] |
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Re: CRT Needed for HP 54520A Scope
Thanks for the idea. I may try to rejuv the. However, my main complaint is the deep burn the glass shows..
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Dan in Chandler,AZ ============================= --- In hp_agilent_equipment@..., Chin Siang Lim <cslim388@...> wrote:
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HP 8620C with 86222B-H69 rf plug in ( with a US serial number )
I have a old HP8620b with rf 86222B-H29 plug in probably made specially for the defence at that time . The output that is not leveled i would like to find the service manual or a place where i could find it , unless somebody has experience with the unit.( It appear also that when you want to plug another rf plug in it is not compatible even with a adapter probably because it was made specially ??) the US serial is 6625-01-036 3730 )
thank you |
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Re: Lamps and Mains Lead for HP412A?
I have an HP411 which is an RF power meter with the same clock work motor and photo interrupter setup as I suspect the 412 has. I got replacement bulbs from a place on the Internet called Bulbtown. You might Google the name but they had all kinds of type 47 bulbs and the type that are used in the HP stuff. They even had the blue tinted bulbs used in my old Drake 4 line ham transciever.
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Bob N2CBH --- In hp_agilent_equipment@..., "Mike Millen" <mike.millen.uk@...> wrote:
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Re: CRT Needed for HP 54520A Scope
Hi Dan,
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If you are prepared to throw those CRTs away, why not try rejuvenating them? See www.ke5fx.com/crt.html www.thegleam.com/ke5fx/crt/sencore.pdf And use some ideas from here : cslim On Sat, Mar 9, 2013 at 6:12 AM, danaz.chandler <djn@...> wrote:
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Re: HP 1740A Parts wanted
I have two DOA 1740's to turn into one working unit, send me a note during the week if you strike out. Might have what you need.
Regards, Chris Sent from my outdated iPhone wireless thingy On Mar 8, 2013, at 6:29 PM, "raymonduk2000" <raymonduk2000@...> wrote: hello, [Non-text portions of this message have been removed] |
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Re: LIF File Conversion.
Jay:
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I have had success! This is what I learned: * Use Agilent LIFUTIL to pull the file off the HP LIF diskette ^ Drive has to be built in so the floppy controller chip is able to be directly instructed by the software. ^ Has to be a FAT or FAT32 machine or the software barfs. ^ Often the file on the HP LIF diskette is a tokenized basic. This means that one or more hex values have been saved instead of the ascii text. So "GOTO" will be a HEX value. # So far, the only way to convert an HP tokenized basic file to an ASCII file is to load it into a vintage HP series 300 computer and then re-save in the ascii format. The LIFUTIL has to be run to save the header information. A lot of steps, but it is possible with help from our HP cloud to get important software off of LIF disks.... Dan in Chandler, AZ ================================================ --- In hp_agilent_equipment@..., "jayw_comark" <jayw_comark@...> wrote:
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oscilloscope probe tips
Greetings,
I have several agilent 10:1 passive probes (N2862A) and need some retractable spring hook tips (PN#: 0960-2900). I searched the internet and distributors listed as Agilent dealers. Many had the REV. B version of the probe, but none that I found listed or stocked the tip. The Agilent website (on-line store) lists them in stock at $4.66 each. However, I have learned that the on-line store is user belligerent and apparently designed to get potential customers to go away. Can anyone point me in the direction of a source that has these probe tips in stock (in the USA) and actually wants to sell them? Thanks for your time and consideration. Regards, Ken |
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Re: making 50 ohm measurements with a 75-ohm s-parameter test set
bdunn246
Hi all-
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Thanks much for the feedback. In my original post, I neglected to mention I do plan to make 2-port measurements of amps, filters, etc. I guess it slipped my mind given how easy through calibration is! :-) For my planned antenna return loss measurements, I see your point, David, that 30 dB is probably excessive. Perhaps 25 dB +/- 3 dB is a more realistic goal. I wonder, at my target frequencies (up to 450 MHz), could i reach this goal if I built my own cal standards for open and short using N connectors? Thanks, Bryan --- In hp_agilent_equipment@..., Brooke Clarke <brooke@...> wrote:
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Re: HP 8640B Troubleshooting help needed
kn4hhptc
Frank, thank you for the suggestion. ?The -20volt regulator had failed. After replacement, the unit works very well.
Thanks again. 73, Bob, KN4HH Sent from Samsung tabletfrancesco messineo <francesco.messineo@...> wrote:As in almost all electronic troubleshooting, I'd start with checking all power supplies. good luck Frank? IZ8DWF On Wed, Feb 27, 2013 at 2:56 PM, kn4hhptc <kn4hhptc@...> wrote:
------------------------------------ Yahoo! Groups Links [Non-text portions of this message have been removed] |
Susan Parker
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