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Barry, Finally getting back to you on the Chop circuit. Using my 140B’s internal calibrator as a source for both channels of the 1402A, I don’t see any difference in beam width or intensity

Even though the 2N3704 and 2N3391 transistors are apparently ECB, the 1854-0071, at least the one that was at Q484, is CBE (l-r looking at it from the flat side). I checked it a bit further and it

One of the key tenets of "right to repair" is that those proprietary alignment / calibration tools must be made available at a reasonable cost... The catch is there's usually no stipulation about

Right to Repair can easily be gotten around by the manufacturers. I have a R&S transceiver which came from a surplus lot.? It had a problem with one module and I swapped in another module from a

Yeah, the PXAs we have at work take a long time to come up, and they always seem to be doing realignments right when you want to make a measurement! Another irritating thing is that if I don't power

The phase noise of the E4406A is quite good but there's a lot of high performance options for measuring phase noise these days...? it's hard to keep up with it all. For many years I've wanted an

HI Brian, I found this zip file in my stash. To generate the diskettes you'll need a PC that can run LIFUTIL.exe. I hope this is what you need! Regards, Stan

According to the HEWLETT PACKARD TRANSISTORS & DIODES. COMMERCIAL CROSS-REFERENCE , an 1854-0071 crosses to a 2N3704 or a 2N3391. Both of those are ECB (apologies to David if those were ones you'd

No worries. We can still be friends! LOL! Jim

I'm sorry Jim, I didn't mean to sound disagreeable. I typed and sent that too fast. Rifa problems are caused by moisture absorption, not line voltage or lightning. This is a very well-known and

Yes, I will keep it on the wishlist! Thanks for sharing the plots. I've heard with it's relatively low phase noise it can be used to measure PN as well. Jim

When used within its limits, the 14 bit E4406A is a really nice analyser. I typically use mine to measure the accuracy of various attenuators and it can also be used to test the accuracy of the 1dB

Pittsburgh, not much lightning here. Nearly every Rifa capacitor I see is swollen and crazed, and when you see that, detonation isn't far behind. -Dave

It isn’t too much to ask for that you be able to replace commodity components that fail with identical replacements. It’s also not unreasonable to want to replace a board with a functional

I suspect you live in lightning country, Dave. Southern California where I live is just about the least likely place on the planet for lightning strikes. After damaging at least 2 instruments in the

Ah, the E4406A is the one with the hole around 321.4 MHz, isn't it? That could be really annoying if you were working with say, 225-450 MHz, as I was a few years back. I do have it on my wishlist,

I've been cross-checking the board against the schematic. I thought I had the dot convention correct (emitter) but then the differences between a few of the transistors on the board made me realize

If it helps promote how good these MXA analysers are, there is a nice hardware feature in the IF section of the PSA and the PXA and MXA analysers that helps when making critical dynamic range

! :) -- Prof. Thomas H. Lee Faculty Co-Director, SystemX Alliance Director, Stanford-Samsung Research Initiative Allen Ctr., Rm. 205 420 Via Palou Mall Stanford University Stanford, CA 94305-4070

That's known as improving your image!