Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- HP-Agilent-Keysight-Equipment
- Messages
Search
|
Old Nixie counters
Michael Dunn
Hi group. I have a couple of old Nixie display counters. A 5214L, and a 5201L. It did take me a while to figure out the '14, but now understand what it does in all its modes. The '01 is similar, but with the addition of a PHA (Pulse Height Analyzer). Can y'all explain this? Perhaps it's just a fancy name for a calibrated trigger circuit?
Michael |
|
Re: Need 3325A component ID
Don Black
These TO220 packaged schottky diodes seem fairly common in switch mode
power supplies used in photo copiers and such now. I don't think you should
have much trouble finding a replacement. Perhaps you can find a junked
copier to get one from. The schottky diodes are fast acting and have less
voltage drop than silicon.
toggle quoted message
Show quoted text
Don Black. Miroslav Pokorni wrote: ?Hello Tom, |
|
Re: Need 3325A component ID
Hello Tom,
toggle quoted message
Show quoted text
Motorola did a lot of Schottky and ultrafast recovery diodes in TO-220 packages. Those were diodes for currents higher than 5 A and to best of my knowledge, none of them were JEDEC registered, so most likely single source. I have seen some other manufacturers putting out diodes in TO-220, but very few of them, not an industry wide practice. Some of those diodes were pairs, and others had tab connected to one of end leads. What you have is either a pair with one leg shorted or it is a bona fide single diode. As Schottky diodes, TO-220 was used up to 30 A and for higher current they used TO-218 (a bigger package). In ultrafast recovery the line was drawn at 16 A. Hope, this helps somewhat. Regards Miroslav Pokorni ----- Original Message -----
From: "Thomas P. Gootee" <tomg@...> To: <hp_agilent_equipment@...> Sent: Tuesday, September 16, 2003 11:41 AM Subject: [hp_agilent_equipment] Need 3325A component ID Hi, all. |
|
Need 3325A component ID
Hi, all.
I need help identifying a part on the power supply board of an HP 3325A. It is CR10. But it resembles a TO-220 transistor. There are three separate part numbers on it: 1) 84-0266 (top of front of device), 2) 8515, preceded by what looks like the Motorola "M", inside a circle (bottom of front of device), and 3) 136725, printed on the top of the device. Terminals 2 and 3 (left to right, from front) appear to be shorted. And if anyone has schematics, or a service manual, that's already scanned or photocopied, I would be very interested. Thanks! Tom Gootee tomg(at)fullnet.com |
|
FS manuals
Joseph Orgnero
Vintage manuals for sale: (originals except as noted)
HP 522B counter $ 5.00 HP A4-C decade counter $ 5.00 HP 5352B freq, conv. (p.o. 5245L counter) $ 15.00 HP 3440 DC voltmeter $ 15.00 HP 403B AC voltmeter (copy) $ 7.00 HP 5245L counter (copy from microfiche) $ 5.00 All prices U$S plus S&H. Thanks Joe Orgnero VE7LBI |
|
Re: HP 3469B multimeter
dyna_dan2
--- In hp_agilent_equipment@..., "higglyblue"
<higglyblue@y...> wrote: Hi all,the display is behaving sensibly, but the values bear littlerelationship to the electrical signals applied.Hi, Yes there is a manual. My copy is bearely readable. Came from HP microfiche... Check the solid tantalum capacitors on the second board from the top, after removing the top cover, with power off. The same capacitor was shorted on both my 3469A with weird results. There are no labels on my PWB. Regards Daniel Dufresne |
|
Re: Schematic for HP 4328A Milliohmmeter
dyna_dan2
--- In hp_agilent_equipment@..., "Tom Leedy"
<leedyt@a...> wrote: Hi Tom, Contact me by email below. I have a working 4328A and a manual. I can scan it for you. If it whent full scale it could be the batteries or the probe wires. Regards Daniel, ddufresne@... |
|
Program to control and print waveforms from HP54200A
tbfowler100
I recently wrote a program to allow PCs to control and print
waveforms from the HP54200A. The program also allows waveforms to be averaged to reduce noise and improve resolution, and it does FFTs. It is written in Delphi 7, but can probably be modified in recompiled in earlier versions. It has been uploaded to the files section for anyone to use. However, you must have a National Instruments GPIB board in your computer, with the correct drivers, and a cable, of course. I'm working on a new version for the HP54542A, but I'm going to try to keep it compatible with the older version. Please report any bugs to me. |
|
New file uploaded to hp_agilent_equipment
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the hp_agilent_equipment group. File : /HP54200A programs.zip Uploaded by : tbfowler100 <tfowler@...> Description : Program to control and print waveforms from HP54200A You can access this file at the URL To learn more about file sharing for your group, please visit Regards, tbfowler100 <tfowler@...> |
|
Re: FS: HP, Tek, and other test equip. manuals
NR1DX
Bob
I'll take the Boonton 93AD and the Wavetek 157 quote me shipping USPS media mail/Book rate Dave At 08:40 AM 9/11/2003 -0500, you wrote: Test Equipment Manuals for Sale (within USA only).Dave NR1DX nr1dx@... "A man who picks a cat up by the tail learns a lesson he can learn no other way" .... Mark Twain |
|
wanted: page from HP3320A/B manual
Hi,
I need a copy of pages 7-3 and 7-4 from the HP3320A/B op/service manual. Page 7-3 is the block diagram, and I don't know what is on the back (maybe it's blank). A scan would be fine also, or if you could part with the page for a few days, I could copy & return it. I'd be happy to pay expenses or whatever seems fair, trade another manual or parts, etc. etc. Any help would be appreciated! Thanks, David DiGiacomo |
|
FS: HP, Tek, and other test equip. manuals
Bob Parnass, AJ9S
Test Equipment Manuals for Sale (within USA only).
Prices do not include shipping and insurance from the Oswego, Illinois area. Money order or check. Fluke 8040A DMM maintenance (op/service) manual. $15. Boonton 93AD true RMS voltmeter instruction/service manual. $19. HP 107AR/107BR quartz crystal oscillator operator/service manual. $19. HP 3468A/B multimeter operator manual. $19. HP 3468A/B multimeter service manual. $19. HP 5326B/5327B timer counter DVM operating/service manual. $25. HP 5328A universal counter operating/service manual. $29. HP 5328A universal counter user manual. $19. HP 5335 universal frequency counter operating/service manual. $29. HP 8116A programmable pulse/function generator 50 MHz operating/service manual. $29. HP 8601A generator/sweeper operating/service manual. $25. Tektronix 454/R454 scope operator/service manual. $29. Tektronix 475 scope service manual. $29. Tektronix 7603/R7603 scope service manual. $25. Tektronix 7603/R7603 scope operator manual. $15. Tektronix 7623A/R7603A scope service manual. $29. Wavetek 157 programmable waveform synthesizer instruction manual (includes schematics, etc.). $19. All sales final. See other radio and test equipment sale items at: -- ========================================================================= Bob Parnass, AJ9S GNU/Linux User |
|
Re: 456A current probe
can it
be that my rubber has just spun around hiding the hole? Yes it did spin around.........at first try it would not budge......second try after posting the original query found that more might was needed in the effort and lo and behold it did move and turning it 355 degrees still showed no hole, the last few degrees, and lo and behole.....there she be! |
|
456A current probe
Was thinking of cutting the double banana plug off, and replacing it
with Bnc (with the shunt capacitor also). Was also thinking of putting BNC on the amp for both probe and another for the output. This also means putting BNC on the probe too. The cable is .195" dia and heard that it is 75 ohm but don't remember where. Which leads me to figure on 50 or 75 ohm connectors (how can you tell by looking at BNC?) There also is a 100/1 divider available for this probe that connects to the probe end microdot connector, any facts on what in this little divider? The probe goround lead in the manual shows what appears to be the end screwing into the rubber of the cable strain relief, surely the rubber does not get used for the threads does it!!! I have another probe which at least has a threaded hole beneath in the metal, can it be that my rubber has just spun around hiding the hole? With a BNC on the end of the probe does it become a 1110a probe? Any other ideas to spiff up this probe a tad? Maybe bells or whistles!! Maybe its just getting late!!!!!!!! Thanks guys Dave |
|
Re: hp 83522a 2.4 ghz rf plug for 8350b
开云体育Thanks for the helpful suggestions,? I will
check the voltage potential on my DVM.
?
Regards
?
Richard Murray |
|
Re: hp 83522a 2.4 ghz rf plug for 8350b
开云体育jm
?
I checked the manual on my protek 506 dvm & it
said that the test current for diode testing is 1 ma.? The diode in
question is acting as a switch which is controlled by a bias voltage based on
frequency which is controlled by a MUX24FQ 4 channel analog ic.? If the mux
has failed then the bias will not be correct.? When I meter the circuit in
question I get -.34 v. relative to ground which would keep the diode off.?
In any event I just tested the main osc. on the unit and it has stopped working
& I had it up & running last week after resoldering the osc. control
board.? Frustrating.
?
Thanks
?
Richard
?
? |
|
Re: hp 83522a 2.4 ghz rf plug for 8350b
I do not think that it is current that would kill schottky diode, it is
toggle quoted message
Show quoted text
reverse voltage that might do it in. Some of very old meters were putting 100 mA on low ohm range, but I do not think that there are any of those left functional. Most digital meters use 1 mA current source and then measure voltage. I understand that some of those DVMs have output voltage that reaches level of its supply buttery and that is where you can damage a schottky. Oops, I went to check my Fluke and that is one of those 'schottky diode damaging meters' that applies 8 V plus to output terminals at no load; I was under impression that Fluke used a voltage clamp for all Ohm ranges, but, I guess, I was fooled. It is funny that my 'Harbor Freight Special', $3.99 meter is using 0.85 mA and output voltage does not exceed 2.6 V, what would be satisfactory for schottky diodes used in sampling bridges. Regards Miroslav Pokorni ----- Original Message -----
From: "John Miles" <jmiles@...> To: <hp_agilent_equipment@...> Sent: Friday, September 05, 2003 7:56 AM Subject: RE: [hp_agilent_equipment] Re: hp 83522a 2.4 ghz rf plug for 8350b Couple of ways:your VOM doesn't exceed it. Possibly need to disable autoranging on the meterto make sure. |
to navigate to use esc to dismiss