Re: Introduction
As for magnetic influence: keep your Rb reference oscillators away from magnetic fields. It probably does not show in everyday use but the Rb units are susceptible to magnetic fields. Wilko
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Wilko Bulte
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#147276
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Re: HP 141T Power Supply Help Needed
I think the 141T had a storage CRT and that looks like flooding. Thats when the storage gain typically on the front panel is too high. Not good to leave it that way for long. Paul WB8TSL
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paulswed
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#147275
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Re: Introduction
Took me a while to work out why a 16500C LA display wobbled when I pushed it further back on the bench. Eventually realised it was a metcal soldering iron supply, which still has a magnetic field even
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Adrian Godwin
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#147274
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Probing deep and/or narrow into a given unit for troubleshooting
Hi all, I was wondering of asking for thoughts and ideas on probing deep into some units, or maybe just through a narrow clearance. What I'm thinking of is primarily for use with a DMM (vanilla
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Radu Bogdan Dicher
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#147273
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Re: Introduction
Add in SystemVerilog if one is contemplating FPGA/ASIC work. DaveD KC0WJN Thanks for all the fish. ============================== All spelling mistakes are the responsibilty of the reader (Rick Renz,
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Dave Daniel
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#147272
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Re: Introduction
Thanks for the feedback Roy. I really appreciate it. So I have a solid foundation of math/physics through my chemistry degree. Calc III, dif equations, quantum chemistry. The math I'm not worried
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Frank Mashockie
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#147271
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Re: HP 141T Power Supply Help Needed
Replaced q15 and the crt is at least trying to do something. Ordered a hv probe but wondering if maybe this is related to deflection amps. Doesn't seem good so shut it down after the Pic. Focus
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Bill Berzinskas
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#147270
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Re: Probe Cables for 16801A Logic Analyser
What Card do you have in it? I am pretty sure any of the later grey cables will work. Such as: https://www.ebay.com/itm/315689218821 168xAx, 169xAx,?1691xA ( which are used in various 198XX Units )
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William Stillwell - KI4SWY
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#147269
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Re: Introduction
If your boss is not paying for it... It's expensive. 2 to 3 years to complete, on average. Say 50,000USD total cost, on average... and up... for many good US schools. Georgia Tech is... about the
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Roy Thistle
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#147268
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Re: Introduction
Thanks! I can remember back at Marconi I once thought I had trashed an expensive (and brand new!) Mi 6500 amplitude analyser because I had set it down quite firmly on top of an old microwave sweep
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jmr
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#147267
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Re: Free to good home, HP 5423A system + manuals and spares
Dave, Some info: I have working copies of the firmware tapes and can duplicate them to 3M QIC80 tapes. With some minor modification you can let the 5423/5420 system work with QIC80 tapes. The systems
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Rik Bos
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#147266
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Re: Introduction
I agree, I found out the hard way when I was in my late teens with a scope and a PSU and couldn¡¯t figure out why I had fluctuation measurements/traces.... Never do it now. ? Regards Nigel Sent
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nigel adams
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#147265
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Re: Introduction
The arrangement of equipment can be important in several ways; heat is one of them. Another is the radiation of magnetic fields from power transformers which can induce hum in stacked equipment.
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Richard Knoppow
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#147264
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Re: Introduction
In case this is of any interest, in my first job (at Marconi many years ago) I was taught how to arrange RF test equipment on a workbench and anyone who didn't follow the official guidelines was soon
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jmr
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#147263
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Re: Introduction
Yes, that's how I've set up my workroom. I don't really have much choice though as my workroom is quite small. If I put it all in this main workroom I doubt I'd be able to get into the room let alone
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jmr
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#147261
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Re: Transferring waveforms from 54542a through GPIB
I do: :WAV:SOUR CHAN# or :WAV:SOUR WMEM# :WAV:POIN? :WAV:XINC? :WAV:XOR? :WAV:XREF? :WAV:YINC? :WAV:YOR? :WAV:YREF? :WAV:DATA? I loop through all channels and memory and if the channel or memory is
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Steven Maddy
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#147260
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Probe Cables for 16801A Logic Analyser
Does anyone know the part numbers for the cables and probes for this analyser. I have some of the manuals but they dont say what cables to use, and no cables came with the unit when I purchased it
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richard@...
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#147259
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Re: HPIB disk drive as a substitute for SRAM cards
Hi Jim, You are probably missing a driver. Finding one may not be easy. Also did you format the card as DOS or LIF? See
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Robert G8RPI
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#147258
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Re: HPIB disk drive as a substitute for SRAM cards
SUCCESS!! I used this free editor https://freehexeditorneo.com/ to edit the PRC (procedure) file This (picture) highlighted in yellow was the critical spot to change from Card to Disk. I made sure to
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Jim
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#147257
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Re: Introduction
Hi Burt, The tables do not touch the wall directly, I put a space of 8 inches (20cm), and this space contains a shelf with holes to let the wires pass through. Two 6-inch (15cm) side fans adjustable
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Yves Tardif
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#147256
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