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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 Ω) 350C
- Attenuator set (600 Ω) 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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Re: 3457a on the way
Another important consideration will be the onboard battery BT501.
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See if you can determine its age. Also, according to my manual (dated Feb 1988 ed 3) on page 6-26, along with the list of the many updates applied to new revs, they list a new battery and new resistors to replace the old one. The original unit appears to have used a 2.9V model and has been replaced by a 3.4V battery. If you plan on sending it in for cal, you would probably want to put in a fresh battery. You probably don't want to pay Agilent to do it for you and you don't want to lose the new cal constants a week after calibration. Hopefully that mod has been done already and all you will have to do is source the replacement. You will probably need a second battery to keep the NVRAM powered while you replace the old one. Todd --- In hp_agilent_equipment@..., Jeff Machesky <jeff@...> wrote:
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Re: HP8558/9 Nylon Clutch
Which nylon clutch parts? The attenuator gears on mine, that slide to engage, are brass, with what appears to be a standard 45degree tooth face. The only nylon parts are the switch finger cam and the internal tooth gear (both of which are certainly HP custom parts). If you can't find replacements from a donor unit, there is a thread here by a member that did some great gear casting for the 8640 generator gears that suffer the same fate. I don't think HP anticipated these units still being in service 40-50 years later.
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--- In hp_agilent_equipment@..., "jonathan8013" <g4mdc@...> wrote:
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HP8558/9 Nylon Clutch
Hello All, my first post :-)
I have been searching the group history for any information about a possible source for the Nylon Clutch mechanism that is part of the input attenuator/reference level switch on the above analysers. I don't have the part number to hand but I could find it. No success so far. It seems a particular weakness of these otherwise excellent analysers. I have an 8558 with the Atten switch completely useless (has been in pieces for years for want of these parts) and an 8559 that is going the same way. Is robbing parts from another unit the only option? I don't suppose a 3D printer (a very good one!) might be any solution? Regards Jon |
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Re: 3457a on the way
Thanks Joe. Gives me a bit of piece of mind. I may have overlooked your details in the post. So I assume the self test OK message pretty much rules out failures I need to worry about ? My apologizes for being such a cynic.
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I finally found a source of 500V AC to try and get my Tek 2465BDM DMM calibrated within reason. Sadly it keeps changing the impedance on me when it goes in to to the actually cal. Very annoying. But that's a topic for another group. Thanks, Jeff On 12/29/2012 7:08 PM, J. L. Trantham wrote:
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Re: 3457a on the way
If the 'SELF TEST OK' message appears, there is no need to make any
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'adjustments'. Just do the 'front panel CAL' if needed. As I said, I would check it out, assume it is the best instrument in your collection, send it to Agilent for CAL and see what you get. I would appreciate knowing what 'REV?' and 'OPT?' says when you get a chance. 'CALNUM?' would be interesting as well. In the 3458A, the firmware is in an EPROM (6 EPROM's for the older units) and can be removed, a socket placed, and easily upgraded by purchasing the latest pre-programmed EPROM (or EPROM's for the older units) from Agilent. The only problem is they have a $50 minimum for this $18 part for the later units. My wife thinks I am going to appear on an episode of 'Hoarders'. Joe -----Original Message-----
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of Jeff Machesky Sent: Saturday, December 29, 2012 8:01 PM To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] 3457a on the way Wow, lots of replies all of a sudden. I'm already prepping the wife for the $200 + price tag of calibration. Funny how when I was single I would have about $800 in cash in my wallet at all times and now I beg for 20 bucks, Hmm. Sad part is I make about 4 times the money. In any event I've not received to much feedback on the "Self Test OK" message the seller had posted. Any comments? I'm too much of a skeptic when it comes to eBay purchases. It's just a convenient place to purchase such goods. Any feedback would be appreciated as to possible pitfalls regarding this device. I like to prep for issues rather then build myself up for failure. What do they say...it's better to be pleasantly surprised then let down. Thanks, Jeff On 12/29/2012 5:40 PM, J. L. Trantham wrote:
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Re: 3457a on the way
Wow, lots of replies all of a sudden. I'm already prepping the wife for the $200 + price tag of calibration. Funny how when I was single I would have about $800 in cash in my wallet at all times and now I beg for 20 bucks, Hmm. Sad part is I make about 4 times the money. In any event I've not received to much feedback on the "Self Test OK" message the seller had posted. Any comments? I'm too much of a skeptic when it comes to eBay purchases. It's just a convenient place to purchase such goods. Any feedback would be appreciated as to possible pitfalls regarding this device. I like to prep for issues rather then build myself up for failure. What do they say...it's better to be pleasantly surprised then let down.
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Thanks, Jeff On 12/29/2012 5:40 PM, J. L. Trantham wrote:
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Re: Agilent 33120A Option 001 P/N 33120-80001
I'm looking for the Option 001 Phase-Lock Assembly for an Agilent 33120A Arbitrary Waveform/Function Generator.
This is a module that allows 10 Mhz Reference in and out of the unit. It's also a 10 Mhz TCXO. I,ve seen some on Ebay before. Anyone have a link or a source for one? Thanks |
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Re: 3457a on the way
I had a Solartron 7081 that I had sent to AMETEK for repair and calibration.
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I used it as a ‘transfer’ standard. My AC source was a 3326A fed via Coax to a 50 ohm terminator read first by the Solartron then fed to the 3458A and the ‘Solartron value’ entered into the 3458A. The 10 VDC was a 731B and the 10K resistor was a Leeds and Northrup 10 K resistor, both read by the 7081, and then feeding those measurements into the 3458A. I was amazed at how well it worked. Now I have a Fluke 5100B that should be much better at the AC stuff and not bad at the rest of it as well. Although the Fluke 5100B is only 5 ? digits, it is fairly stable and should be a good ‘source’ to be read by the 3458A or the 7081, as long as everything is ‘warmed up’ and you are quick, giving it little time to change. Joe -----Original Message-----
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of David Kirkby Sent: Saturday, December 29, 2012 7:04 PM To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] 3457a on the way On 30 December 2012 00:40, J. L. Trantham <jltran@... <mailto:jltran%40att.net> > wrote: When getting an Agilent calibration of the 3458A, you get 'As Received'and 'As Completed' data. Very helpful to me in that the only two points myWhat do you use as a "House CAL" that is almost good enough for the 8.5 digit 3458A? That's a seriously accurate (and seriously expensive), multi-meter. Dave. [Non-text portions of this message have been removed] |
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Re: 3457a on the way
David Kirkby
On 30 December 2012 00:40, J. L. Trantham <jltran@...> wrote:
When getting an Agilent calibration of the 3458A, you get 'As Received' andWhat do you use as a "House CAL" that is almost good enough for the 8.5 digit 3458A? That's a seriously accurate (and seriously expensive), multi-meter. Dave. |
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Re: What is a good shortwave radio to use with HP 8568B SA?
Thank you for all your responses. I think I'm going to pursue the SDR
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option, although I'll keep an eye out for an inexpensive shortwave radio if I see one. On Sat, Dec 29, 2012 at 3:11 PM, Jeff Machesky <jeff@...> wrote:
Bryce, I actually use a Softrock Ensemble II SDR for shortwave. It has |
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Re: 3457a on the way
According to the manual, there are only two 'adjustments' that can be made
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on a 3457A, Input Offset Amplifier adjustment and AC Converter Frequency Response, both needed only if there is a 'HARDWARE ERR' failure message after 'TEST' is selected and then only if it is a specific 'AUXERR' or 16 or 256 is seen. Otherwise, all the calibrations are done from the front panel with specific inputs from the front panel. The CALNUM? is incremented by 'several digits' with a 'complete calibration', one for each calibration point entered, per the manual. Interestingly, when I sent my two 3458A's to Agilent for calibration, the CALNUM incremented by only 1. However, when I calibrated one of them before sending it to Agilent, (since I lost the data in the DALLAS CALRAM chip that I was removing) the CALNUM went from 1 to something like 34 or something. I don't recall. It seems that if you have the appropriate software to run the complete calibration protocol, it only increments by '1' instead of by all the data points entered. Such software exists for the 3457A but I have never seen it available 'on theBay'. I suspect Agilent would have that software and equipment to do that calibration and, thus, an Agilent calibration may only increment the CALNUM? by 1. When getting an Agilent calibration of the 3458A, you get 'As Received' and 'As Completed' data. Very helpful to me in that the only two points my 'House CAL' of the one 3458A failed were the two 'midrange' AC Voltage values. All else 'PASSED'. I agree with Dave. If it's HP/Agilent, I prefer Agilent to do the CAL. If it's Solartron, I prefer AMETEK (Solartron), etc. I believe that having some 'basic' professionally calibrated instruments (DMM's, Noise Sources, Power Sensors, Frequency Standards (unless you have a GPSDO, CS Standard, etc.) etc.), that you can then use as 'transfer standards' to do your own 'in house' calibration of other instruments, is very important if you want to set up a reliable workshop. Of course, you will also need a 'stable' source of the various signals that you will use to be 'measured' by the various 'DUT's', such as resistance, voltage, current, frequency, etc. The 3458A is relatively easy to calibrate, requiring only 10.000000 VDC, 10000.000 ohms, and some AC voltage at various frequencies, IIRC. I have never CAL'd a 3457A but the 3478A is a multi-step process. This whole thing can become very 'addictive'. Be careful. Joe -----Original Message-----
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of David Kirkby Sent: Saturday, December 29, 2012 5:53 PM To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] 3457a on the way On 29 December 2012 20:01, Jeff Machesky <jeff@... <mailto:jeff%40codebest.com> > wrote: Thanks Dave, I actually have watched those videos. Bit drawn out likeI thought the bit showing the noise on the DVM was a bit silly when it was connected to a DC power supply. As for the 3457A, if it works I plan on getting it calibrated by AgilentI think the calibration service you chose might dictate whether you get data about the condition when sent. When I send mine in for cal, I'd like to know what was out and by how much. But I'm not going to pay extra for a calibration service that provides that. As far as I'm concerned, if Agilent calibrate it, then it is OK. For me personally, it makes no difference whatsoever if it has ISO, NIST or whatever calibration. But I'd prefer Agilent to someone else. I have calibration certificate here for an Agilent VNA calibration kit. It was done by a calibration house in the USA. But from what I can gather from reading the documentation, the equipment to calibrate them is not available commerically. So it makes me wonder how a lab can calibrate a cal kit, when the equipment to do it can't be bought. I suspect there is a fairly cosy realationship between some test equipment dealers and calibration facilities. I plan on purchasing someI don't know if there are pots in there you can adjust with a trimmer, or if it is all done electronically. You might find it is impossible to calibrate yourself. I never had any reason to look inside mine. Dave |
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Re: 3457a on the way
David Kirkby
On 29 December 2012 20:01, Jeff Machesky <jeff@...> wrote:
Thanks Dave, I actually have watched those videos. Bit drawn out likeI thought the bit showing the noise on the DVM was a bit silly when it was connected to a DC power supply. As for the 3457A, if it works I plan on getting it calibrated by AgilentI think the calibration service you chose might dictate whether you get data about the condition when sent. When I send mine in for cal, I'd like to know what was out and by how much. But I'm not going to pay extra for a calibration service that provides that. As far as I'm concerned, if Agilent calibrate it, then it is OK. For me personally, it makes no difference whatsoever if it has ISO, NIST or whatever calibration. But I'd prefer Agilent to someone else. I have calibration certificate here for an Agilent VNA calibration kit. It was done by a calibration house in the USA. But from what I can gather from reading the documentation, the equipment to calibrate them is not available commerically. So it makes me wonder how a lab can calibrate a cal kit, when the equipment to do it can't be bought. I suspect there is a fairly cosy realationship between some test equipment dealers and calibration facilities. I plan on purchasing someI don't know if there are pots in there you can adjust with a trimmer, or if it is all done electronically. You might find it is impossible to calibrate yourself. I never had any reason to look inside mine. Dave |
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Re: 3457a on the way
Watching these videos has sparked my interest in my 3457A and raised some
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questions. As for calibration, the Agilent website lists a per incident calibration at $204.22 and an End of Support date of 4/1/2003. It would be interesting to send it directly to Agilent and see what the data is 'As Received' versus 'As Completed'. If it has a total failure of the back up battery and you loose the calibration constants, then do your on 'House CAL', send it in, and see how well you did. When I hit CALNUM? and hit Enter, I get '98'. Now for the questions: What is the latest firmware for the 3457A? When I hit REV? and Enter, I get '6,0'. Also, what options were available for the 3457A? I could not find anything in the manual other than some mounting brackets and such, no internal 'electronic' options, although there is a box on the back of the DMM to check for 'STD' or 'OPT 700', what ever that is. When I hit OPT? and Enter, I get '0' Thanks in advance. Joe -----Original Message-----
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of Jeff Machesky Sent: Saturday, December 29, 2012 2:01 PM To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] 3457a on the way Thanks Dave, I actually have watched those videos. Bit drawn out like most of his videos..but still good. Too much detail is not always a bad thing. As for the 3457A, if it works I plan on getting it calibrated by Agilent within the year. From what I understand it's about a $200 US investment. The meter was last calibrated in '98, so I'll be curious to see how accurate it is when I get it. Crossing my fingers that it works. The Fluke 8050A that I purchased for $25 and repaired is working a treat. Well within it's rated spec even after having the front end blown out of it. The best part about it is that the case is in excellent condition with hardly any signs of aging. I should know on Thursday if all went well. I plan on purchasing some voltage references from the well known site as a basic test of the 3457A. I may even calibrate it based on those references if it's way out and later getting it NIST traceable calibrated. Thanks, Jeff On 12/29/2012 10:01 AM, David Kirkby wrote:
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Re: Foam conductor problems
Philip Souza
I have used a product from Anders Products called Wire Glue. Not an inspiring name, but works very well. It is non conductive until it cures. Very low resistance and dries to a dark neutral grey color. Interesting to watch the conductivity change during last part of cure process. Price around $10 US.
Phil From: Gary Sent: Saturday, December 29, 2012 12:33 PM To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] Re: Foam conductor problems Here's another product --> <> but a bit more pricy! Gary --- In hp_agilent_equipment@..., Daniel Koller wrote: know how it works, and how it dries, for a totally different use. ? good absorptive coating for calorimeter-based optical power detection. related to the original post off-line. ? Thx. ; 5 properly before I get crazy with fixes. All the LEDs and keypads go throughthe conductive foam which is the weak link in the design.wrote: problem with my SA. All the electronics check out after replacing some partsconductive foam seems to be the culprit. I've repaired LCD displays by cleaningworking but some of the key pads quit working. I cleaned it a second time andhow to fix the rubber key problem. I have some conductive paint but thesuccess repairing this kind of problem?[Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
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Re: Foam conductor problems
Here's another product -->
<> but a bit more pricy! Gary --- In hp_agilent_equipment@..., Daniel Koller wrote: know how it works, and how it dries, for a totally different use. ? good absorptive coating for calorimeter-based optical power detection. related to the original post off-line. ? Thx. ; 5 properly before I get crazy with fixes. All the LEDs and keypads go throughthe conductive foam which is the weak link in the design.wrote: problem with my SA. All the electronics check out after replacing some partsconductive foam seems to be the culprit. I've repaired LCD displays by cleaningworking but some of the key pads quit working. I cleaned it a second time andhow to fix the rubber key problem. I have some conductive paint but thesuccess repairing this kind of problem?[Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
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Re: What is a good shortwave radio to use with HP 8568B SA?
Bryce, I actually use a Softrock Ensemble II SDR for shortwave. It has the added advantage of being able to precisely lock on to the WWV stations and check the accuracy of my frequency counter. It also is just truly amazing to use the SDR software such as SDR-Radio or HD-SDR. You can calibrate it down to the sub Hz level and the sensitivity is really good. It can be build for LF or HF ranges. I could go on and on about the coolness of the device.
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Just food for thought, Jeff On 12/29/2012 9:24 AM, disklog wrote:
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Re: 3457a on the way
Thanks Dave, I actually have watched those videos. Bit drawn out like most of his videos..but still good. Too much detail is not always a bad thing.
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As for the 3457A, if it works I plan on getting it calibrated by Agilent within the year. From what I understand it's about a $200 US investment. The meter was last calibrated in '98, so I'll be curious to see how accurate it is when I get it. Crossing my fingers that it works. The Fluke 8050A that I purchased for $25 and repaired is working a treat. Well within it's rated spec even after having the front end blown out of it. The best part about it is that the case is in excellent condition with hardly any signs of aging. I should know on Thursday if all went well. I plan on purchasing some voltage references from the well known site as a basic test of the 3457A. I may even calibrate it based on those references if it's way out and later getting it NIST traceable calibrated. Thanks, Jeff On 12/29/2012 10:01 AM, David Kirkby wrote:
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Re: HP 8551 Spectrum Analyzer FS or trade?
Based on warranty statements of other HP BWO gear, it looks like filament failure is the primary cause, maybe preceded by instability of some type. The Stewart BWOs had a warranted filament life of 18 months or 500 hours, which ever came first. The warranty was not honored if the returned tube was broken.
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-Dave ----- Original Message -----
From: "Daniel Koller" <kaboomdk@...> To: "hp agilent equipment" <hp_agilent_equipment@...> Sent: Saturday, December 29, 2012 6:23:00 AM Subject: Re: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade? Howdy. In my brief poking around inside he RF unit, I did not notice anything that looked like a YIG, but I wasn't looking for it. I doubt it's got the mod though. What is the failure mode of the BWOs? Do they simply stop working, or drift, or have reduced sweep span? I noticed the warnings in the manual to keep the span at less than 100 MC/cm whenever possible. Anyway, it still works for now! Dan ________________________________ From: " d.seiter@... " < d.seiter@... > To: hp agilent equipment < hp_agilent_equipment@... > Sent: Saturday, December 29, 2012 12:11 AM Subject: Re: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade? In theory, but I have yet to find one with the YIG mod. Or, to be more accurate, most people selling them only have the main unit, or it and a display, but none of the cables or filter- they don't even know if it works, let alone what it's internal config is. I honestly don't have the room for another set. -Dave ----- Original Message ----- From: "Dave Brown" < tractorb@... > To: "hp agilent equipment" < hp_agilent_equipment@... > Sent: Friday, December 28, 2012 1:18:20 PM Subject: Re: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade? Once the BWO has been replaced with the YIG upgrade kit thats no longer an issue- does this one have that upgrade applied? 73 Dave, ZL3FJ Christchurch, NZ ----- Original Message ----- From: < d.seiter@... > To: "hp agilent equipment" < hp_agilent_equipment@... > Sent: Saturday, December 29, 2012 8:13 AM Subject: Re: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade? Another problem with the 8551 (besides its' weight and therefore very high [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
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Re: Foam conductor problems
Interesting stuff. ?I have not used it but I too would like to know how it works, and how it dries, for a totally different use. ?
How black is it when it is dry? ?I am curious if it would make a good absorptive coating for calorimeter-based optical power detection. Dan p.s. realize my interest is Off-Topic so happy to take any replies not related to the original post off-line. ?Thx. ________________________________ From: Gary <GEMCCLUNG@...> To: hp_agilent_equipment@... Sent: Saturday, December 29, 2012 2:26 PM Subject: [hp_agilent_equipment] Re: Foam conductor problems ? I found this doing a search --> <> Has anyone ever used this stuff? I'm still not sure if my pads are defective. I want to make sure the conductive foam is working properly before I get crazy with fixes. All the LEDs and keypads go through the conductive foam which is the weak link in the design. Gary --- In hp_agilent_equipment@..., "William" wrote: types of keyboard switches. Bill HIgdonwith my SA. All the electronics check out after replacing some parts but some of the buttons and most of the LEDs were not working on the front panel. After opening the front panel I found that this conductive foam seems to be the culprit. I've repaired LCD displays by cleaning conductive foam but the conductors in this foam seem very small. I cleaned it up with some ISO-alcohol and some of the LEDs started working but some of the key pads quit working. I cleaned it a second time and the same results. Some other buttons are working but some still not. The LED problem is solely the problem of the conductive foam but the keys could also be the conductive pads on the rubber keys. I've measured the resistance on most of the pads and they are about 50 ohms except for some that are 200 ohms and greater (up to about 480 ohms). I'm not sure what the max resistance can be and still make the key function. My solution first is to just solder the two boards with a connection harness to eliminate the conductive foam but I'm not sure how to fix the rubber key problem. I have some conductive paint but the resistance is still high, around 150 ohms. Does anyone have any success repairing this kind of problem? [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
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Re: Foam conductor problems
I found this doing a search -->
; 5 <; 15> Has anyone ever used this stuff? I'm still not sure if my pads are defective. I want to make sure the conductive foam is working properly before I get crazy with fixes. All the LEDs and keypads go through the conductive foam which is the weak link in the design. Gary --- In hp_agilent_equipment@..., "William" wrote: types of keyboard switches. Bill HIgdonwith my SA. All the electronics check out after replacing some parts but some of the buttons and most of the LEDs were not working on the front panel. After opening the front panel I found that this conductive foam seems to be the culprit. I've repaired LCD displays by cleaning conductive foam but the conductors in this foam seem very small. I cleaned it up with some ISO-alcohol and some of the LEDs started working but some of the key pads quit working. I cleaned it a second time and the same results. Some other buttons are working but some still not. The LED problem is solely the problem of the conductive foam but the keys could also be the conductive pads on the rubber keys. I've measured the resistance on most of the pads and they are about 50 ohms except for some that are 200 ohms and greater (up to about 480 ohms). I'm not sure what the max resistance can be and still make the key function. My solution first is to just solder the two boards with a connection harness to eliminate the conductive foam but I'm not sure how to fix the rubber key problem. I have some conductive paint but the resistance is still high, around 150 ohms. Does anyone have any success repairing this kind of problem?
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