CHECK OUT THE WIKI The purpose of the wiki is mainly to allow you to find information on instruments, either from either
- The model number
- The function(s) listed below. Some instruments have multiple functions - for example, the 4195A is a VNA, spectrum analyzer and an impedance analyzer. Therefore the 4195A is listed in multiple categories
Please also check out HPWiki available here:
- Accessory kits - various types
- AC power analyzers - PA2201A and PA2203A
- AC power supplies 6811C, 6812C, 6813C
- Airlines
- Arbitrary waveform generators M8194A
- Amplifiers?493A, 495A?
- Attenuators (optical) 8156A, 8157A, 8158B, 81566A, 81576A,?
- Attenuators (RF) 8494A
- Attenuator set (500 ¦¸) 350C
- Attenuator set (600 ¦¸) 350D
- Attenuator switch driver
- Audio analyzers? 8903A, 8903B, 8903E,? ?
- Base station test sets
- Bit error rate testers (BERTs)
- Cables
- Capacitance meters U1701A, U1701B, 4272A, 4278A, 4279A
- Capacitor Bridge 4270A,
- Capacitor standards 16380A, 16380C,?
- Carrier noise test setsi
- Cesium frequency standards
- Clamp ammeters
- Close field probes
- Crystal Impedance E4915A, E4916A
- Data Acquisition Systems (DAQs)
- DC power analyzers
- DC power supplies 6030A , 6031A , 6032A, 6033A, 6035A, 6131C, 6621A, 6622A, 6623A, 6624A, 6627A, 6255A, 6645A, 6671A, 6672A, 6673A, 6674A, 6675A, 62003A, 62003C, 62003E, 62004A, 62004B, 62004E, 62005A, 62005B, 62005E, 62006A, 62006B, 62006E, 62010A, 62010C, 62010E, 62012A, 62012C, 62012E, 62015A, 62015C, 62015E, 62018A, 62018C, 62018E, 62024A, 62024C, 62024E, 62028A, 62028C, 62028E, 62048A, 62048C, 62048E
- Delay lines
- Detectors
- Device current waveform analyzers
- Digital communications analyzers
- Directional couplers
- Distortion analyzers 330B, 330C, 330D, 331A, 332A, 333A, 334A, 339A, 8903A, 8903B, 8903E,???
- Dynamic measurement DC source
- Electrometers
- Fading simulators
- Femto ammeters
- Filters
- Frequency counters 522B, 5342A 5343A 5352B
- Frequency standards?
- Function Generators ? 3310A,? 8165A,
- GPIB controllers, extenders, cables etc.
- GPS frequency standards
- Harmonic mixers
- High resistance meters 4339B
- High resistance meter fixtures 16008B
- HEV EV Grid Emulators and Test Systems
- In-circuit test systems
- Impedance analyzers 4195A, 4291A, 4291B, 4395A, 4396A, 4396B, 4294A, E4990A, E4991A
- Impedance Analyzer Accessories
- Impedance / Gain Phase analyzer 4194A
- Impedance Meter 4193A,
- Isolators
- LCR meters? U1701A, U1701B, U1731A,? U1731B, U1731C, U1732A, U1732B, U1732C, U1733C, 4191A , 4192A, 4194A, 4195A, E4196A,? 4216A, 4260A, 4261A, 4262A? 4263A, 4263B, 4271B, 4274A, 4275A, 4276A , 4277A, 4284A, 4285A, 4286A, 4287A, 4291A, 4291B, 4294A, 4332A, 4342A, 4395A, 4396A, 4396B, E4980A and E4980AL
- LCR meter calibration devices? 16380A 42030A? 42090A, 42091A and 42100A
- LCR meter accessories
- 2-Terminal BNCs.
- 4-Terminal Pair (BNC connectors)
- Cable extension 16048A, 16048D, 16048E, 16048G, 16048H
- DC current bias accessories 42841A, 42842A, 42842B, 42842C, 42843A
- DC voltage bias accessories 16065A, 16065C,
- Kelvin clips 16089A, 16089B, 16089C,16089E
- Lead Components 16047A,16047B, 16047D, 16047E
- Material 16451B, 16452A
- Probes 42941A
- SMD 16034E, 16034G, 16034H
- 2-port 16096A
- 7 mm (APC7)
- 2-Terminal BNCs.
- LCZ meters? 4276A, 4277A,
- Lightwave clock / data receivers
- Lightwave converter
- Lightwave component analyzer
- Lightwave measurement system mainframes
- Lightwave polarization analyzers 8509B
- Logic analyzers
- Nemo wireless network solutions.
- Noise and interference test set
- Noise figure analyzers
- Noise sources 346A, 346B. 346C ,
- Matching pads (50 ohm to 75 ohm or similar)
- Materials test equipment
- Microwave repeaters
- Microwave downconverters 70427A
- Microwave / THz sources
- Milliammeter 428B
- Milliohm meter
- Mobile communications DC source
- Modular instruments
- AXIe
- Data acquisition (DAQ)
- USB
- PXIe
- Modulation analyzers
- Multimeters 427A, 970A
- Optical attenuators
- Optical heads
- Optical sources
- Optical spectrum analyzers
- Oscilloscopes 120A, 120AR, 120B, 122A, 130A, 130B, 130BR, 130C, 140A, 140B, 141A, 150A, 150AR, 160B, 180A, 180AR, 180CD, 181A, 181AR, 181T, 181TR, 182C, 182T, 183A, 183B, 184A, 184B, 185A, 185B, 1200A, 1200B, 1220A, 1221A, 1703A, 1707A, 1707B, 1710A, 1710B, 1715A, 1722A, 1725A, 1726A, 1740A, 1741A, 1742A, 1743A, 1744A, 1746A, 1980A, 1980B, 5403A, 6000A, 6000L, 16533A, 16534A, 54100A, 5410B, 54100C, 5100D, 54111D, 54120A, 54120B, 54200A, 54501A, 54502A, 54503A, 54504A, 54520A, 54520C, 54540A, 54540C, 54542A, 54542C, 54600B, 54601A, 54601B, 54602B, 54603B,? 54645A, 54654N, 54710A, 54720A, 54750A, 54825N, E1428,?
- Oven controlled crystal oscillators (OCXOs)
- Pattern generators
- PCM terminal test set
- Phase noise measurement
- Pico ammeters
- Printers 2225
- Plotters 7470A, 7475A?
- Probes
- Protocol analyzers and exercisers.
- Power booster test sets
- Power meters 431A, 431B, 431C, 432A, 435A, 435B, 437B, 438A
- Power splitters
- Power supplies
- Pulse generators
- Q-meters 4342A?
- Q-meter calibration inductors 16470A
- Reflection transmission test set
- Return loss module (optical)
- Relays / switches / switch matrices (optical)
- Relays / switches / switch matrices (RF)
- Resistor standards 42030A?and 42100A
- S-parameter test sets
- Scalar network analyzers
- SCSI bus preprocessor interface E2324A
- Selective level meters 3746A
- Semiconductors
- Semiconductor parameter analyzers 4145A, 4155B, 4156B,
- Signal analyzers
- Signal generators / sweep generators / signal sources / oscillators 200CD, 201B, 209A, 204D,? 608A,? 8165A
- Software
- Source measure units
- Spectrum analyzers 4195A,???
- Switch control units
- SWR meter 415E?
- Time interval? counters
- Time mark generator 226A
- Timing and data state modules
- Torque wrenches
- Transmitter testers
- Trigger modules
- Ultrasound transducers
- Universal bridge? 4260A, 4265A, 4265B?
- Vacuum tube voltmeter 410C
- Vector Impedance Meter 4193A, 4800A, 4815A
- Vector Network Analyzers (VNAs) 4195A,? 8510A, 8510B, 8510C, 8753A, 8753B, 8753C, 8753D, 8753E, 8753ES, 8752ET, 8719A, 8719B, 8719C, 8719D, 8720A, 8720B, 8720C, 8720D, 8720ES, 8722A, 8722B, 8722C, 8722D, 8722ES,
- Vector Network Analyzers (VNA) calibration kits 85032B, 85032E, 85033C, 85033D, 85033E, 85050B, 85050C, 85050D, 85052B, 85052C, 85052D, 85054A, 85054B, 85054D, 85056A
- Vector Network Analyzer (VNA) verification kits
- Vector Signal Analyzer 89650S, 89600S
- Vector voltmeters 8405A, 8508A,
- VXI mainframes 70000B, 70000C
- Waveform and function generators
- Waveguide to waveguide and waveguide to coaxial transitions.
- Wireless 58 OTA chambers
- Wireless channel emulators
- Wireless network emulators
- Wireless communication test sets
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Reading calibration tape
I have the calibration constants for my 7mm (APC7) cal kit but the info is on an HP tape. The part no of the tape is 85050. Has anyone a means of reading the data onto a more modern format? Paul G8AQA
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Issues with HP 8902A Measuring Receiver
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To anyone with HP 8902A know-how, I just acquired a HP 8902A Measuring Receiver (SN 2834A) that was clearly dropped by FedEx during transport, most likely by the customs inspectors. The lower back bumpers are broken off (taking small pieces of the frame with them); there is no visible internal damage. Some quick initial experiments revealed the following. (i) On startup, there are no error messages, but after about 10 seconds the controller seems to be cycling through some subprogram causing continuous clicking of a relay. All voltages are "in the green" (LEDs on the regulator board). (ii) The 42.0 SPEC command (display software date) yields 61.1987. (iii) With a 7 MHz signal above -6 dBm, I obtain power readings about 1 dB off the mark, below -6 dBm the readings abruptly drop far lower. (iv) No frequency readings could be obtained. (v) On A23 (sampler), the NO HF VCO and OUT OF LOCK lights are on. The service manual files are at the copy center (the brain prefers paper). Questions: a. Any direct suggestions based on the above random tests? b. Is there a command for starting a fully-fledged test sequence? c. The "Basic Operation and Application Guide" seems to be a running ad for the HP 11722A Sensor Module. To what extent is this useful/indispensable? Can one calibrate the HP 8902A without the sensor? Any further suggestions would also be much appreciated. 73 Raymond ON4DBV
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HP Basic for Windows 6.33, printed documentation
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I have found the installation image for HP Basic for Windows 6.33 on the internet archive From the images in the archive it looks as though there were a number of printed manuals that were supplied with the package I am especially interested in the Installing and Using and User's manual Does anyone have access to these documents in .pdf from? Peter
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Does anybody have a knowledge of what the inside of the 8340B SYTM looks like or what components are around the PIN diode? Pictures would be helpful if anybody has taken theirs apart for fun. The block diagram shows 1000 Ohm resistor in series with the PIN diode bias shown in the figure below. My low band output power is attenuated some of the time, with lower frequencies attenuated more than higher. There appears to be running at least 1mA from PIN bias to the PIN diode which may be and indication to why my low band is sometimes attenuated. Do PIN diodes generally start to leak current when close to total failure?
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Hello HP fans, I was tinkering with my HP 85024A and some unexpected measurements made me to question my setup. Short to the point : I use a HP11880A N Adapter to link my probe to a N socket, and the reading is around -5dB from what I expected. The measured levels are perfect without the adapter. It appears that my HP11880A N Adapter exhibit a 50¦¸ DC resistance to ground. In the 85024A Technical Overview 5968-2101E, page 4 told us 1M¦¸/0dB ; suggesting that the adapter should be a simple coax line without any DC resistance to ground. I checked the same adapter in the box of my HP 41800A probe and, guess what, the 11880A adapter also exhibits 50¦¸ to ground. I feel like missing something big... Might someone of you folks enlighten this debate ? Best Regards, Fran?ois / F4HTX
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HP 8713B does not start
After 5 years of non-use, the HP 8713B does not start and after switching on only the display and the LED on the CPU board flicker. In stand-by mode, the green and red LEDs light up, which is normal. When I remove the A3 board, the analyzer starts and error messages are displayed on the monitor. All 4 LEDs on the power supply are green. Has anyone experienced this? I have checked the electrolytic capacitors but all are ok. Does anyone have an idea what it could be? Thank you, Franz
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(OT) Affordable PCB fabrication (-> tariffs/US...)
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Hi all, This may of particular interest to US members, but I am wondering how others are handling the effect of tariffs (in particular with China) on your PCB fabrication needs. Though I should say, recommendations on reliable, good fabricators is likely information that everyone could use. I have two raiser cards I designed (for Fluke instrumentation/calibrating equipment), and maybe I should just wait for all this to blow over (assuming it settles somewhere different than where we are), but I'd rather plan for tough times. I used to use JLCPCB, but with the additional costs triggered by the tariffs, I may be looking at about two or three times the cost (rather closer to the latter than the former), and that just makes is unfeasible to offer this product. At what hobbyists are willing to pay for something like this (which, myself being one, I fully understand), I'd be losing money on each one I'd make. Are there some good options others have figured out where tariffs are not quite so onerous? I looked, for instance, at a place in India, which looks decent enough and not crazy expensive - though distinctly more expensive than JLCPCB - but they don't seem to have some of the capabilities I want, such as beveled card edge and so on. Their features seem to be about half as many as a place like JLCPCB offers. There are some places in the US - and OSH Park need not apply, as these are large and really need volume discounts - but they seem to be very low tech in terms of getting online quotes (=0 capabilities for such at what likely is the most affordable ones) and so it's very hard and time intensive to investigate. But if any of you knows a good, affordable and reliable place, I'd love to hear about it. From what I gather, at this point, offshoring this kind of thing is by far the most affordable and ultimately lucrative option. particularly at hobbyist level. With some places that can price me upon uploading my gerbers, I'm a bit antsy about giving them away. I heard stories where once uploaded, you essentially are giving away your IP and the design may pop up in mass production somewhere. Thank you, Radu.
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HP 35680A
4
I came across an HP manual marked 35680A on a well known auction site. A brief search does not seem to return any hits. Anyone in the group know what it is? Seems like it might be some sort of low frequency analyzer - 3562A, 35660A, 35665A, 35670A? Peter
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Hi all, I am trying to repair a 8591E spectrum analyser for a friend that is totally dead. The Power supply is at fault. Did some googling around and saw some details about a bunch of resistors that could go open. Seems all the ones mentioned look OK. Measuring around the NE??? chip on the daughter board looks like there is no DC to the chips supply pins. I am currently overseas so can't recall the exact chip number. Anyone have any schematics for this supply or any well known problems / hints to repair? I note there is a little grey object near the thermistor wires but don't know what it is and is unlabeled. It measures as a resistor but looks like one of those small RIFA caps with no epoxy on it. Any tips most appreciated. Cheers and TIA, Simon ZL1SWW
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HP34401 Multimeter - 4 wire mode wont zero
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Hi all, I hadn't used my HP33401 on 4 wire mode in years and I suddenly needed it to measure some current shunts when I noticed an issue. On 4 wire mode, with the leads shorted, on 6 digit mode, it wont zero. The last 3 digits fluctuate about. Its a little more stable on the rear terminals which has me thinking its the front/rear switch rather than something else. A search of the net seems to suggest that the switch might be the issue but I thought I'd ask here first before I go disassembling anything and poking about :) So... is this a common error for 4 wire low ohms mode ? Is it the switch ? Is the switch sealed or open enough to squirt some contact cleaner in there ? If the switch needs to be replaced, are they commonly available ? If its not the switch, is it some other common fault ? The meter is fine on all ranges and within spec when tested against other meters and my little transfer standard. Any help appreciated. thanks Tim
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HI, I have a HP8595E with a problem of power supply. The power supply doesn't start when the line switch is on, all the power-supply LEDs remain off. I check the shematic diagram and i find a diode failed (short circuit) CR306 (HSMS-2800) on the PSU control board. I don't understand the function of the AOP U303D on the shematic diagram, so i unsoldered this diode CR306 and i don't replace it immediatly because i didn't have any. I then tried without this diode and the power supply was running well. VSTBY is 15V, the voltage on the pin 10 U303D (KS_EN) is about 6V (VRAIL is about 320V and the resistor divider 632K and R311 12K1 provide this voltage). The voltage on pin 11 U303D is 7,5V by the divider resistor R309/R310 100K/100K. So the output pin 13 of U303D is Hi arround 13 V. When the switch line is on, the PWRON_L is connected to the FB_GND and so the there is no signal on TR301-7 and on the anode of CR302, voltage on pin 6 of U303B is 0V the power supply is on. With these diode CR3036 on short circuit it was impossible to start the power suply because event if there is no signal at the output of T301-7 and the anode of CR302, the output of U303D maintains a voltage on pin 6 of U303B and pin 8 U303C. So what is the function of this U303D ? in my opinion the output of U303D never gone 0V and even if this output is at 0V (it would be possible if the +VRAIL failed) what would be the desired function knowing that the shutdown of the power supply is conditioned by a hight level on the anode of CR306. If anyone understand the interest of this part of the diagram U303D I would apreciate the answer. Thanks to the person who put this diagrams online.
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HP8756A possible CRT subs?
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I fired up this 8756A I've had for many years and never used because it didn't seem to work. The CRT is very dim and with poor focus. I tried to tweak it up a bit by guessing at various pots in the display module, with little improvement. I think the CRT is at its EOL. I can't find any (free) service manuals or info to work on it or even ID the CRT, and I don't think it's worth buying any since I'm very near to getting rid of it anyway, unless I see some potential goodness. Does anyone happen to know if the CRT is the same as in the 8566's IF/display unit (85665 I think)? I have some of these so it might be any easy swap if so, then I could see if it can be fixed. The faces appear to be the same size, and both are electrostatic deflection with drawn graticules, and similar application, so it would make sense to use the same CRT. I know that the over the years the 8566 displays had two different possible CRTs (and support HV circuitry) used - I'm hoping for either one to be a possible sub. Ed
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It¡¯s amazing what great job just some Clorox Wipes & Magic Erasers will do on a marketplace find!!! ¡now on to the hard part¡ figuring why the needles are pegging right!!! ???
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Hello Folks, sorry to annoy you with a problem - in an act of stupidity, I bought like half of a 8510C VNA. In particular, I got the display and the test set, which means I miss the compute unit and the waveform generator. A friend of mine would now have a 2602 serial number of the 8340A unit which he would want to offload onto me for a nice price. For me, the key question is whether this - it is quite an old version of the generator - will be compatible with the 8510C? I looked around the internet a bit, and so far did not find any binding answer... Tam -- With best regards Tam HANNA Enjoy electronics? Join 21k4 other followers by visiting the Crazy Electronics Lab at https://www.instagram.com/tam.hanna/
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HP-8903A Audio analyzer - Un-stable output below 0.5865V (3-relay OSC Board)
Hello All, Need help on HP-8903A, it took more than 2 years fighting, 1.it came with an ERR=18 after checked, -15V rail had bad regulator A11U2 and shorted filter cap C02, an easy fix. 2 after few days playing, system suddenly did not respond to keyboard. found A8 CPU board , the most CPU pins were black and rusted, easily crashed when touch, by soldering IC directly to another CPU socket with fly wires. then seat back to original socket, it run perfectly again. 3. another few days running testing with GPIB program, thank you very much for great work from Mr. Pete Millett. Software did control the measurement and actions, however the voltage reading something wrong, (not taking notes clearly for this issue) through the block diagram, the RMS voltage measurement related with A4 board, follow troubleshooting sheet A4 1-3, confirmed no DC checked on A4TP1, A4U5 was suspicious. Replaced with a new LM301AH, it run good again. 4.few days later, the THD reading getting high just after power On, after 20mins warm up, the THD reading back to normal. after long chasing/measurement on board, and took one lead out to measure film caps. finally found out C45 3uf/100V reading is good, but leaking. New film cap was replaced, it read quick again. Rainy day always after sunny days.. 5.One more issue recognized, when OSC. output lower then 0.5865V, the voltage reading and THD was not stable, up/down slowly. it took long time verify this issue, Since not every time encountered, but says > 70% happened. I can't locate the issue either from Osc. board A6 nor Atten. Board A5, Until I got second unit in very reasonable low price, luckily, A6 Atten. board was confirmed defective board, after several swapping tests. 6. issue is my A6 board is "3 relay" version, can't find matched schematics/troubleshooting yet. the A6 board marked "08903-60105 / A-2242-10", Would someone could instruct where to have it. A6 board from second unit is "2 relay" version matched the service manual. almost last mile to go, any hints would be super appreciated! Chen-shen
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Hi all Regarding 1 mw lab calibration I am looking for comparisons between the old and trusted HP 432A the replacement N 432A and the Tegam 1830A and I was wondering if anyone hear Can give any feedback on the Tegam 1830A compared to the new N 432A Also is there a report comparing the 3 meters Regards Paul
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Hi all, I've had limited success (hand) writing, and sometimes printing, labels to stick on DIY project boxes for miscellaneous labeling needs. There was some chatter here on materials and printing means and solutions, but I'm really only looking for some recommendations for DIY projects. What types of sticky labels are better for these specific applications? What stays put and doesn't peel off the minute finger pressure gets lifted, or there's some variation in temperature and/or humidity? Or just the passage of... minutes. I've this far used "office supplies" types, but they'd always peel off in short order, and there must be affordable, easily accessible other options I'm not aware of. Apologies if this is far off topic - hopefully others will find it useful for their own needs. Thank you, Radu.
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In going through my bookshelf recently I discovered several HP8753 A/B & C manuals as well as 8702 and even what appears to be R&D documentation created during the transition to color probably for the C. These include a variety of things including some schematics. If anyone wants these enough to pay for shipping from Colorado, US, I'd be willing to send them. Otherwise they will be scrapped. One way or another I expect them to be gone by June 2025. 8 May 2025 Glenn n6gn
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Group, I was always interested in what kind or type of paint the professional products are using - no chipping, slick, solid and just great. Very long lasting! What is the type of this paint, how is it transferred to the metal housing (is it spray or dipping or plain brush?) Any insight will be more than welcome! :) As an example, this is what I'm talking about (please disregard the Narda part numbers):
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HP 8566B repair
5
Hello everyone. Suddenly my spectrum analyzer (HP 8566B) has the following problems: the low band signal is about 40 dB lower than it should be. The high band has stopped working: the various bands no longer appear on the screen, but a single band similar to the low band and the signal is completely absent! I strongly suspect that the YTX oscillator is dead or almost dead! Does anyone have any ideas about this? Thanks. Images: HP8566B and output at first LO connector. IMG_20250504_121626.jpg (89.93 kB, 1000x750 - viewed 13 times.) IMG_20250504_121605.jpg (122 kB, 1000x750 - viewed 16 times.)
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Image Name
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