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Date
Re: 8970B learnings
The first unit with the defunct VTO is 3713U05470 and the second opt 020 unit is 3619U04475. I mentioned the control boards were coated with goo from the melted robber bumpers (side note, there are
By Peter Gottlieb · #91827 ·
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
Well, let's say I am willing to pay up to ?3000, and another volt-nut up to ?3200. He places the bid, and I don't bid against them. Had we both bid, the other volt-nut would have still won, but
By Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> · #91826 ·
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
Unfortunately for this forum, I will have to say time-nuts. The second is a fundamental unit of measurement and the volt is not. Now, if you consider amp-nuts, they would be on equal footing. Regards,
By Mark Goldberg · #91825 ·
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
Why? Begs the question then of who gets to play supreme deity and decide who is "more worthy" Dave manuals@... -- Dave Manuals@... www.ArtekManuals.com
By Dave / NR1DX · #91824 ·
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
It would be nice if volt-nuts and time-nuts could come up with a way so they don't bid against each other. >
By Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> · #91823 ·
HP 141T sn:1850A 16959, hp: 8556A sn: 1907A 04190 and hp 8552B sn:1841B sn:1841A15130
Just saved the 141T from the dumpster, powered unit up and got no initial signal on Scope, found 1/4 amp fuse open, put fuse in, brought unit up without modules in and fuse did not blow, inspected
By george.fridrich@... · #91822 ·
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
The trick on that one is not bidding against a fellow volt-nut. :)
By bownes · #91821 ·
Re: [RSGBTechnical] Some suspiciously cheap RF test kit on eBay UK
drkirkby@...> wrote:
By Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> · #91820 ·
Re: 8970B learnings
Roger¡­ if you can't I can send you the schematics¡­ nothing fancy (just a new mmic) . find out what plug in for the 8350 it is in¡­ I have several ones with issues. Pete
By Pete Manfre <pmanfre@...> · #91819 ·
Re: 8970B learnings
Well you are the amplifier guru. Let me see if I can first find a replacement now that I¡¯m interested in getting these things going. Peter
By Peter Gottlieb · #91818 ·
Re: 8970B learnings
Wheat range do you need¡­ I have some I made that are 30mhz to 8ghz Pete
By Pete Manfre <pmanfre@...> · #91817 ·
Re: 8970B learnings
Thanks for that background, just the kind of info I was curious about. If I can locate a proper replacement YTO for that first unit it would be great and now knowing where else it is used is a big
By Peter Gottlieb · #91816 ·
Re: 8970B learnings
Peter, There is a business reason the two meters have such different RF hardware. The original design was based on the 8558 spectrum analyzer plugin. That plugin was already quite old by the time the
By pianovt · #91815 ·
Re: 8970B learnings
Thank you I will definitely check that. The rubber feet inside on the bottom boards all dissolved into goo, which I¡¯m seeing more often. I fear many older plastic items will meet this fate over
By Peter Gottlieb · #91814 ·
Re: 8970B learnings
CHeck for a bad bleader resistor on the reset line.? I have seen that same thing before.? Once it charges it keeps the processor in reset. Pete
By Pete Manfre <pmanfre@...> · #91813 ·
Re: 8970B learnings
They are different. I will post this evening, you might have the manuals. Peter
By Peter Gottlieb · #91812 ·
Re: 8970B learnings
No I¡¯m happy enough just amazed! And I will end up learning a bunch more about these instruments as well as ending up with a better capability unit. Of course it would be even better to end up with
By Peter Gottlieb · #91811 ·
Re: 8970B learnings
BTW¡­ if not happy I can take it back. P
By Pete Manfre <pmanfre@...> · #91810 ·
Re: 8970B learnings
serial number prefixes for the two???
By Dave / NR1DX · #91809 ·
8970B learnings
A while ago I bought a 8970B noise figure meter but never got it running due to a bad YTO. Recently, thinking it would be interesting to play with, I bought another for parts, figuring I would make
By Peter Gottlieb · #91808 ·