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I've noticed so far three 436A power meters on ebay with light blue front faces, though everything else about the instrument seems to be in normal HP colors. I've seen a couple times a Fluke 8060A (or was it a 8062A?) in a light blue plastic case (although again, other bits like the Lexan front label are normal colors) and it was associated with IBM. Was the 'blue' 436A a custom configuration for IBM also? Why would IBM go to such lengths? A deterrent of some kind? [Quite frankly, the 'blue gear' is rather ugly to me as nothing else about the instrument's appearance is changed to be compatible with the color. I've got to believe that Fluke's and HP's industrial designers had fits over the idea.] Anyway, I'd love to hear the story.... Don Beaverton, OR

I have made some progress since my initial post on my defunct 8662A. One of the 2N5397 JFETs in one of the oscillators was defective and now both oscillators need to be aligned as they only operate in certain band segments. There are 3 miniature pots on each VCO, two of which adjust the IDS for each FET and the other for the VS of the FETS. Has anyone repaired these VCOs in the past that may be able to share their experience. I feel I am real close to getting it to play. Thanks – Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-901-9193

I just picked up an HP-8654B signal generator with the HP-8655A synchronizer but I am having a problem with the combination. When I try to lock the sig gen with the synchronizer the synchronizer immediately drops out of lock. I checked the synchronizer and noted that an increase in input frequency causes the phase-lock voltage to increase in the positive direction and a decrease in frequency causes the phase-lock output voltage to drop in the negative direction. Similarly, an increase of the voltage into the sig gen phase-lock input causes the output frequency to increase and visa-versa. Needless to say, I have a positive feedback situation, which explains why the combination immediately drops out of lock when I try to synchronize the sig gen. I suspect there must be a switch to change the polarity of either the synchronizer output or the sign gen phase lock input but I don't have any manuals and I tried looking for something obvious, but to no avail. Does anyone know of any such switch or jumper that would change the polarity of the synchronizer output of the sig gen phase lock input? Thanks for any help.

Hi, Does anyone have the part number for the woven cable that goes between a HP 1650B series logic analyser and the pods? Even better - does anyone have any spares? The cables consist of a pair of 2x20 0.1-inch pitch connectors (they look like IDC40s) with grey casing and a woven cable connecting the two connectors together. I also need some grabber probes (and maybe some replacement data wires with the compensation network built in) to fit the pods. Anyone got some spares or know of a source for them? Thanks. -- Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB, philpem@... | ViewFinder, 10BaseT Ethernet, 2-slice, http://www.philpem.dsl.pipex.com/ | 48xCD, ARCINv6c IDE, SCSI ... Free Holiday in Holland for Girls send e-mail to address above for info.

Dave, Interesting that you have that problem. I have an 8552B that exhibits the same symptoms! Or at least I think it does. My display (in log mode - linear mode is not often useful in a spectrum analyzer) shows about 20dB down from the intended calibrated level. You are to be congratulated on narrowing it down to the final amplifier - that's good troubleshooting. Remember that if an amplifier fails, it does not block all signals. Instead, a single-stage amplifier may change from a 15dB gain block (if that's what it was intended to be) to a 15dB LOSS block - in my case, that would explain the 30dB down symptom. In a solid state amplifier, the first suspect is the amplifying device itself - the transistor. If the amplifier is common-emitter, it may have a resistor from emitter to ground, bypassed by a capacitor. If that capacitor fails open circuit, then the amplifier's gain will be seriously degraded. Particularly suspect would be any electrolytic capacitors, at the age of these instruments. How were you able to operate the IF section outside of the mainframe? Or did you plug the module into a mainframe without an RF section and able to troubleshoot from the little bit of topside access that would get you? As far as the vertical positioning question, remember that a spectrum analyzer is not intended to be zero-centered like a scope. Instead, the bottom line or the top line of the graticule is the reference. In linear mode, that means zero volts at the bottom of the screen. The analyzer uses a diode detector in linear mode, so there's never negative voltage - just RF envelope voltage. In log mode, the top line is the reference. If you set the gain controls so that zero dBm (one milliwatt into 50 ohms) is at the top of the screen, then each division down from that is 2dB or 10dB depending on the setting of the log/lin switch. With an oscilloscope, we move the vertical position control around to get the signal on screen, and take note of where zero landed. The signal goes up and down from zero. On a spectrum analyzer, the absolute position of the signal on screen is a part of the measurement, so the zero volt line is at the bottom, always, and the dB reference line is at the top, always. Good troubleshooting! Dave Date: Tue, 3 Aug 2004 15:06:34 -0700 From: "Dave Faria" <dave_faria@...> Subject: HP 8552b Problem Good afternoon list. I have an HP141T with the Hp 8553b and Hp 8552b plug ins. I am new to solid state test equipment and need some help. I have down loaded all the manuals from the BAMA list. The situation of my unit is it appears to work in all aspects except it does not have sufficient vertical gain. It will show its calibration signal in all modes 2db log, 10db log, and linear but, the display will not show the peaks at the levels that it should(7.1mv, -30db). The signals are abt 2/3 of what they should be on the .1uv and -60db scale. I have done the test indicated in the 8552b manual to test the final amp. I injected a 3mhz signal at pin 14 of card XA4 with that card pulled. The test indicated the amp was not working. Where do I go from here?? The down loaded Hp manual is not that easy to use or read. Another thing that I don't understand is why would all functions continue to work with a failed amp. One thing that may help someone who understands this unit is when I change the gain(db or mv) the entire trace will shift either up or down on the screen, sometimes out of the range of the vertical position control. This problem would be corrected by a balance control adjustment on an old tube type scope. Thanks for any help or comments Dave Faria WA5TEZ __________________________________ Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! http://promotions.yahoo.com/new_mail

Is there a converter of some sort to allow me to use a more common video monitor like my Panasonic TR990c on my HP8920B? Below are examples from the manual of monitors to use. CRT VIDEO OUTPUT A multi-sync monitor must be used to match the video sync rate of 19.2 kHz. Examples of this type of monitor include - Mitsubishi Diamond Scan, NEC 3D, Leading Edge CMC-141M, and Sony CPD-1302. Thanks, Rick T

Im looking for an attenuator for a HP8590A Spectrum Analyzer. Its identified as follows; Wavetek 34280 Programmable Attenuator Agilent part number 0955-0453 As usual it costs crazy money from Agilent. Anyone got one for cash? Thanks Gearoid Loughnane Dublin Ireland

Hello group, I am located near to Herr Singer , near is in the global internet view , it is 2 hours driving by car but nevertheless i do visit Herr Singer often , I have seen the HP signal sources for the scrapyard, they are in good shape and there is a fifty fifty chance that they will work . I myself bought a HP8616A 1.8-4.5 Ghz generator ready for scrapyard for 35 euro , it is in perfect shape and still performs within specs ! However I do agree that if you have bad luck , so the other fifty of the fifty-fifty then you will have to scrap the unit ... Regards, Erik

Hello... Is there any out there that can give me some help in setting up a HP E1405A to talk via RS232 to my PC. I don't have the manual. I acquired the box on eBay, and don't have the info to set the various switches... Does the Hp E1405A support the Resource Manager that the HP E1406A has? Etc... Cheers Peter -- Peter T. Lyman SpaceSoft Associates mailto: lyman@...

For those of you that are familiar with the HP power meters and sensors, I just received a clean surplus 8482H sensor. It has me a a little worried though as it shows a bit of jitter at 0dBm (using the reference outputs) on either a 435B or 436A power meter that I have. The reference outputs and meters are ok with a couple other 8482A sensors I have, and it's the same situation regardless of which sensor cable I use (I have two). Therefore, it definitely is localized to the sensor. The jitter is a few needle widths in either direction and is somewhat erratic. It calms down on the higher ranges when using higher power into the sensor. Feels like it is intermittent somehow, though a tap here or slight bump there doesn't seem to make a difference in how it behaves. Do I have a defective sensor, or is this not unusual? If this is not good, is there some amount of very careful disassembly and reassembly of some part of the sensor that might cure it? The sensor is prefix MY41 if that helps. Seems too new for trouble, though perhaps that is why it was surplussed! Thanks in advance for any insight. Don C Beaverton, OR

I am looking for an HP xxxx - 60195 10 mhz High Stability Oscillator which is for the HP-8657A Sig Gen.

While dismantling a old, dead HP voltmeter for parts to resurrect (I hope) it's sibling, I came across a part I hadn't seen before. It was a glass tube about 2-1/2" long and 3/8 inch diameter, with a wire out each end. Inside the glass was a cylindrical object with a spiral cut on it. The glass tube was marked "Victoreen", "RX-3", 89 M, "1%" and "U.S.A.". What is it? Sincrely, __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new_mail

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

Dear Colleagues, I am in need of a handle for an HP 8683B Signal Generator. It is a universal handle that fits all the HP series of equipment of this same size. This is not one of handles which is die cast as part of the side of an instrument. It is a handle which is meant to be removed in order to attach rack ears and can be easily spotted because it protrudes both forward and outward, away from the front instrument panel. The flange of the handle I need must mate into a recess which is approximately 1/2" by just a bit over 4 1/2" I am in dire need of ONE but would gladly purchase up to 3 of them. I also need the 2 bottom rear feet for this generator. The are not the black feet but instead are the greenish ones with 3 prongs for attachment. All replies are appreciated, including suggestions of where I may purchase these items. Best regards, Mike DiGirolamo, W4XN Charlottesville, VA 22901

My 5370A has never completely worked. It will measure time interval, especially from stop to start, but frequency and period are way off (10MHz ref measures as about -97kHz, or about -10.299us). A friend loaned me a book, but it's a little out of date to my serial number (2044A010XX). Anyway, I've been going though some of the fault trees, and I think I've got a problem with the stop channel arming circuit (I suspect it's stuck in the armed state). For instance, I can power the sucker up with the inputs set to sep, X1, 50 ohm, positive slope, and no input signals. +TI mode, 1 sample, mean, etc. If I toggle the *stop* slope, then the start slope, the display will update and show the interval between stop and start. From what I can tell, this is wrong in +TI mode. Can anyone check against a known good 5370? If anyone is following along in the book, I'm working through the A22 fault tree: 2: Connect BNC cable from rear panel 10MHz output jack to front panel START input. Set both LEVEL controls to PRESET. Also set switches to 50 ohm, X1, DC, START COM, SLOPE switches to rising, SAMPLE RATE out of HOLD, and FREQ STD switch (rear panel) to INT. Turn instrument power on. Counter should power up to TI, MEAN, SS of 1, and +TI only. -> 3 3: Does counter display ~100ns? No -> 4 4: Remove input signal and push RESET. Does the ARM light come on? Yes -> 6 6: Is U21(12) an EECL low (-0.6V)? Yes -> 8 8: Are P1(/6) and P1(12) at EECL lows (-0.6V)? Yes -> 10 [I think they mean P1(/12)...] 10: Does level at P1(/6) change to EECL high (0V) when position of start channel SLOPE switch is changed? (Return to rising when done.) Yes -> 22 22: Push RESET. Is TP10 an EECL high (0V)? No -> 23 23: Flip flop U24A and U25B is not being reset. U25 pins 14 and 15 should be EECL low (-0.6V). [End of the line, no further direction. U25-14 and U25-15 are both low, as they should be.] thanks! newell N5TNL

Hi, I've just found a pair of dead probe cables (the cables that go from the 01650-61608 probe pod to the grabber) on my analyser. These are listed in my service manual as HP/Agilent part number 5959-9333. Has anyone got a spare pack (or two) of these cables? Failing that, does anyone know of a supplier who has a few in stock (preferably at less than $90)? Thanks. -- Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB, philpem@... | ViewFinder, 10BaseT Ethernet, 2-slice, http://www.philpem.dsl.pipex.com/ | 48xCD, ARCINv6c IDE, SCSI ... You are only young once, but you can be immature forever.

Hi, I recently acquired a broken HP3312A function generation. The unit has a burned resistor near a power transistor which I believe is a voltage regulator. The unit also has the amplitude vernier damaged. The vernier control shaft is completely gone. Other than that the entire unit is still in good shape. I want to repair it. Does anyone has HP3312A service manual & schematic? Where can I get used HP equipment parts at a reasonable price? Thanks, Tommy

Hi all Repairing a 5245L and need some of the decimal point indicator lamps. I have looked on Ebay and at sphere.bc.ca and found nothing. Does anyone know of a source for these or an equivalent part. Thanks BL

Hi: I have an HP 5065A on the way and am looking for an original manual. Thanks for any help, Brooke Clarke, N6GCE -- http://www.PRC68.com http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com

Neat. I wonder how long this has been up... surprised I haven't seen it yet. http://www.findarticles.com/p/articles/mi_m0HPJ/di -- jm