Re: My $25 "In Poor Shape" 3468A has arrived
Hi George, I thought it would just make sense to preemptively replace the old original backup battery, as replacing it now would eliminate the burden of having to check up on the voltage in the
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Alex
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#94724
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REVISED LIST MORE ADDED....FS: HP-Agilent & Motorola Data Books & Annual Catalogs
My sincere apologies for having to send out a revised list but I missed adding these 10 Motorola data books ($7/ea like the other Motorola books): Small Signal Transistors, FET's & Diodes, Rev 5 Power
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Gedas
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#94723
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Re: My $25 "In Poor Shape" 3468A has arrived
Glen, You message jogged my memory.? The units were originally shipped with the Eternacell battery from Power Conversion inc. -- thanks for that. Again, the battery is? ? NOT? critical.? 3.0v
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[email protected]
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#94722
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Re: My $25 "In Poor Shape" 3468A has arrived
My early unit has an Eternacell SDX type G32/13 from Power Conversion, Inc. 3.0v on the nameplate. I found an old listing on AliExpress that says these were 1400mAh cells. The chemistry is lithium
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Glen Hoag
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#94721
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FS: HP-Agilent & Motorola Data Books & Annual Catalogs
I am original owner but time to clean some shelves. All of the HP annual catalogs are in mint condition, $15/ea and include: 1991, 1994, 1995, (2) 1996, 1997, 1998, 1999, 2001, 2008/2009, HP RF uW &
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Gedas
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#94720
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Re: My $25 "In Poor Shape" 3468A has arrived
Alex, I can help you and others with these matters but not until later in the year.? ?Most of my inventory for the 3468/3478 is back in Colorado and I have moved to Minnesota.? I will be making it
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[email protected]
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#94719
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Re: HP6632A power supply: 2mV output even when output is disabled!
This sounds like a thermal, galvanic or earth loop issue. what voltage do you get with both DMM leads on different parts of the same?output terminal?e.g. one on positive out, one on positive sense?
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Robert G8RPI
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#94718
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Re: HP6632A power supply: 2mV output even when output is disabled!
As per my first post: "The power supply is configured for local sensing.", meaning the straps are installed. I also tried to replace them with pure copper wires to see if something would change, ..but
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Emanuele Girlando
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#94717
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Re: HP6632A power supply: 2mV output even when output is disabled!
Hi, Do you have the strapping on between the output and the sense terminals in the back? If not, they are still connected via some resistors, so as to still have regulation, but those introduce errors
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Szabolcs Szigeti
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#94716
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Re: HP 1854-0071 Transistor Sub. Roem Corp CP4071
Replaced by 1854-1293 or 2N3391. --- This email has been checked for viruses by AVG. https://www.avg.com
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Merchison Burke
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#94715
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Re: My $25 "In Poor Shape" 3468A has arrived
Thanks for the tip, yes I will send a request in that group as well for the needed/wanted 3468A parts. There is one 3468A front panel on ebay which I was going to buy due to the ominous dark shades my
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Alex
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#94714
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Re: My $25 "In Poor Shape" 3468A has arrived
Just posted some before/after pictures in a photo album, which will be update as further progress is made. /g/HP-Agilent-Keysight-equipment/album?id=85973
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Alex
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#94713
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Re: HP6632A power supply: 2mV output even when output is disabled!
ok, I am going to give that a try tomorrow night.
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Emanuele Girlando
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#94712
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Re: HP6632A power supply: 2mV output even when output is disabled!
Reading the specs says (I think) that the 0 volt setting should be within +/- 10 mV of 0. In any event, all the adjustments are done with the GPIB and a computer. The calibration program is included
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tmillermdems <tmiller11147@...>
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#94711
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Re: HP6632A power supply: 2mV output even when output is disabled!
Hi you say the Power supply + ve and - ve are floating How about using a 2 core screened cable with the screen connected at both ends _____ From: [email protected]
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Paul Bicknell
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#94710
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Re: HP6632A power supply: 2mV output even when output is disabled!
Thank you for your suggestions.. I am using normal DMM leads well twisted together. The negative output is isolated from earth (the PS is floating). The PS and the DMM are connected to the same earth
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Emanuele Girlando
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#94709
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Re: HP 3478A - working
ROFL!! Buy the latest TV from the competition, chop out components until it stops working, put that one back, and go to production! Complete insanity. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Dave McGuire
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#94708
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Re: HP 3478A - working
That company had the wrong focus. Better use their engineers for new designs. G?ran Den m?n 25 feb. 2019 21:22Dick <w1ksz@...> skrev:
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G?ran Krusell
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#94707
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Re: HP6632A power supply: 2mV output even when output is disabled!
Hi is the dvm at the same earth point /socket as the power supply and are you using a balanced screened cable for the DVM ? _____ From: [email protected]
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Paul Bicknell
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#94706
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Re: HP83732A .010 - 20 GHz signal generator calibration results
Hello, Forgot in the first message: credits and thanks to Richard Parrish who gave me some very valuable info on the 83732A to start with! Regards, ? Staffan
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Staffan
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#94705
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