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I thought the video explained things very well.? From what I can see, the amplifiers provide fixed gain and adjustments are made after the amplifiers.? The video shows the "B" model, but the circuit

Yes, fourgt. One of my favorite sellers. I buy lots of stuff from them, they are normally great. Have bought other items from them since. But *somehow* they say they have 'lost' their entire stock of

That's weird. That's Global Test, they are a pretty large and reputable company. I've purchased many items

Ironic. See this? https://www.ebay.com/itm/361453769613 Agilent/HP/Keysight 5954-1504 HP5344S Product Note No, 8756-3 $20 I knew that sounded familiar, that I'd seen it lately. Wouldn't you

Thanks Mark. That explains the absence of data! The video link provided by Tom earlier in this thread has pointed me in the direction of likely suitable replacements, so looks like a Mouser order

Thanks Morris. I will check all your suggestions. I should point out I have not replaced C12 at this stage. Its hard to access but it appears to measure ok.

R30 is in series with the negative supply to the 6CW5s so if its getting too hot there's too much current being drawn through them. Check the voltages on the grids (pin 2) and cathodes (pin 3) of the

Thanks all, By some stroke of incredibly luck I've connected with Paul who happens to have the calibration disk to my specific serial number. As I sift through the repair now I've noticed that when

Looking for a pdf copy of the above. Its title is -" How to use the HP 5344S Source Synchronizer with the HP 8350B Sweep Oscillator and the HP 8756A Scalar Analyser" DaveB, NZ

OK, some progress for those who may still be interested after such a long thread :) I replaced both 6CW5 tubes and I now have some output that responds to frequency and amplitude dials, albeit a bit

Hi, Sorry for slow reply, but I'm really busy at work. I put some pictures in the photo album: /g/HP-Agilent-Keysight-equipment/album?id=269596 I can't see any way to disassemble it

I have a good working probe and two 4815As that need some work. First I would like to get one working and see if I can get some value from it in my lab. I would like to get a second probe and

I was trying to repair an HP/Agilent E5071B (VNA) a while back and ran into a similar situation... failed HP MMIC with a similar part number. Had no luck finding any info. Called Keysight and they

Hi Tom. Yes, the amp type is used before and after the modulator. Thank you for the link.

Is this one of the amps just before and after the modulator? Also, this video is very helpful. https://www.youtube.com/watch?v=RSCGAY5z_44 Tom Bryan

The 4815A is a vector Impedance meter. Are you thinking of making the probe, or do you have one? I would not recommend trying to make a probe for it.

That's PIC17C42A 33MHz PLCC in Industrial or Extended Temperature range Must be unused as they are OTP parts. Thanks David

Hello everyone. My ESG 3000A became faulty (unlevel indicated) some 20 (!) years ago but I finally now have time to repair it. Relatively fixed frequency output noise (broadband peaks at circa 200

Hi, The part number referenced in the 8563-SG service guide (replaceable parts Table 4.4 page 243 attached) is 5062-7089 mfr code 28480. There is also a part number 08562-60040 referenced in a

I am gathering the test equipment needed and looking for information to make up the Special Test Cables. I should be able to make them and test the characteristics but don't know how long they are. I