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List, FS - Three plug in’s used in 8660’s. 2)- 86603A one has phase modulation capability. These are the high frequency units that go to 2600 MHz. 1)- 86633B, Modulation plug in. These plug in’s were all in use and working about a year ago when the 8660;s were retired, maybe one has a bad attenuator step. Sold as is, but as pictured and complete, $150.00 for all three shipped to your door, US only, L48. Gary WA2OMY

HP list, with all the interest in 8660’s recently, I can offer this 11672A cable kit for sale. It is complete, but as expected the foam has deteriorated, everything will need to be cleaned. Hard to see but the cables and connectors are in very good condition, looks like it has not had much use. This is the kit to extend plug in’s, not mainframe board extenders. I used 8660’s for many years here, good piece of RF test equipment, but replaced with lighter weight/small size. $80.00 total shipped to your door, US only, L48. Gary WA2OMY

Hello Community, I got a 33522a Arb Signal Generator. I'm still looking for a file format description of the binary arb file format ( *.barb ). I found some information about this format and I still can create this files with the basic Parameters - Number of Channel - Numbers of Data Points - Vmax - Vmin - Checksum - Datapoints I found some information about the ASCII Version of the file format ( *.arb ) and there are some more parameter i can set. The problem ist for using the whole 16M space i do need the binary file structure. Finally there are several 32bit or 64bit int / float values which are unknown for me. IT seems to me this unknown values could set a lot of interesting Parameters. Is anyone in this group who has a full description of the *.barb file format for the 33522a series? Alternative could be someone who hast the keysight sw benchvue with Wave Form Option for creating such binary arb Files. He could create a Set of Files with different settings. This could analyzed by my sw. Thanks and best regards TomS

Hi, I repaired an 8591A for a friend, but the display on his screen isn't perfectly straight. I'm guessing there's an adjustment for that, but where is that adjustment? There are adjustments on the top for intensity, frequency, green gain, and horz. Coarse focus on the back, and focus on the side. I haven't attempted to remove the display yet. Yves

Hello, This is my first post here, thanks for allowing me in. I've had the chance to pick up an HP3403C True RMS voltmeter, serial 1452A03359, with options 0011 (Autoranging) and 006 (dB display). I bought it with its condition unknown. I know some of the parts inside are absolutely not replaceable but for the price it was a bet I wanted to make. So it came in the mail. It must have spent the last few years of its existence in a cellar as it had some slight facia corrosion damage, and absolute STINKS of mold. I have cleaned it thoroughly but it still smells a bit inside. The display is stuck on displaying +1V, blinking. If I set the speed to fast it blinks a bit faster. Sometimes it'll display rubbish until the next power off/on again. It seems to react to the switches as the comma moves with the ranges and the dB display also lights up. I have checked the power supply lines (following the procedure), they're good and I can't see much ripple on my oscillo. I'll replace the capacitors of the power supply but only when I know it works as to avoid unnecessary spending. I have removed all the boards in it (converter and options) only leaving the motherboard, PSU and the display unit and it is still stuck. I therefore believe the issue is not converter related but display related. The display is basically a 3.1/2 digit DVM built around a LD110 (digital processor), LD111 (analog processor) and an SN74LS47N decoder for the displays. Here's their datasheet, and Here's some additional info on the Tek wiki about the duo of LDs. I'm quite the beginner and lack some diagnostics knowledge. The display is also a rather convoluted assembly. Considering the high humidity storage it went through I suppose solder corrosion is not out of the question. I have already cleaned what I could (the boards were all perfect thought) and the gold plated connectors (also perfect) with isoprop. What would be your recommendations on what to try next? Thanks everyone, Arnaud.

Just wondering if anyone has experience loading a one-shot retriggerable waveform over Ethernet into a 33210A arbitrary waveform generator. I'd love to hear the Reader's Digest version of how I can do this. I need 10k points at a rate of 1 or 10 kHz. Peter

Does anybody have a 3D model of Agilent 5041-8820 Rear Strap Handle Cap? Mine has shattered and I'd like to replace it. I have the metal insert so only need plastic outside piece. Cheers Leo

I'm on (the other) HP 8673D repair project now. This one never worked in the time I have owned it, and I'd been storing it as a parts mule, but decided (now that I have some experience with disassembly and repair) that I'd like see if I can bring it back to life. Primary symptom: Very low output (rarely approaching 0 dBm, at some frequency ranges much less), unleveled indicator (as the available RF would never reach the setpoint of the ALC circuit), yet never an "unlocked" indication. Fault isolation so far: The service manual vol 2 08673-90022 (in section BD5) walks through several tests; it turns out RF level (so-called "baseband") 2.0-6.6 GHz out of YTO (then through a bias tee, modulator for pulse modulation, and a high pass filter) measures with adequate RF on all YTO frequencies (spec is >= 10 dBm; this is satisfied with about +18 dBm at bottom end of range and staying above +10 dB to the end of the range.) This signal is sent to the YTM assembly; output from YTM is very low and fluctuates widely across frequencies. The service manual details RF level tests at the high pass filter output (what goes to the power amplifier which is the start of the YTM system) and RF level tests at output of the YTM (this output is very low and uneven across frequencies, resembling output of the 8673D overall, so fault is in this area. Further attempt at fault isolation: The YTM assembly includes a power amplifier (A1A11, part number in my (preliminary) manual is 08673-67004. The popwer amplifier in this 8673D part number is 08673-67011. The manual provides zero detail (that I can find) detailing expected output of the power amplifier that feeds the YTM itself. As that connection was SMA, I connected A1A11 power amplifier output (via attenuation) to the power meter and found ~0 dBm output (varying widely across frequencies), and after a few minutes in this configuration, A1A11 amplifier output went to zero and never returned. Unsuccessful search for details in service manual: Attached are photos of the A1A11 amplifier and two associated PC boards, part numbers 08673-60140 (provides DC to the A1A11 power amplifier via pins E1 through E12) and 08673-60139. The DC test points on 08673-60140 (upper/larger board in photo) expect +5, -3.5, -6.5 and -9 VDC; I measured these (in system while running) at +5, -6.5, -6.5 and -9 (+/- some mV), so the -3.5V test point's voltage was incorrect. I'm not able find schematics of either board in the (large/heavy) service manual, hence my posting here - does this ring a bell with anyone that may have encountered these modules in another context, has worked on an 8673D in this area, or has seen these mentioned in the service manual volume 2 (document number 08673-90022)? In modern times, getting more gain and power at 2.0-6.6 GHz would not be at all difficult, however, the YTM is sensitive to the level of RF input, and it appears visually that the circuitry around the A1A11 amplifier is at least in part allowing the CPU to control output from A1A11 to keep drive within some (undocumented) acceptable level window. Thanks for any clues! Dave