Dr. David Kirkby from Kirkby Microwave Ltd
99.99999999999999% sure it will be LCR. My 8720D is, as is my 8753ES.
Dave
On Fri, 22 Mar 2019 at 10:01, Pete_G4GJL < g4gjl.uk@...> wrote: Can anyone tell me if the 8719ES VNA has a CRT or an LCD Display, please?
Peter Worrall
G4GJL
-- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
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Re: Looking to connect with other 4396B owners
Hello,
this is very valuable - sadly, I am in the middle of the tax war
at the moment. Do you mind if I post these to my Instagram to
preserve them?
Ta,
With best regards
Tam Hanna
---
Enjoy electronics? Join 13700 other followers by visiting the Crazy Electronics Lab at
On 22. 3. 2019 8:42, Tobias Pluess
wrote:
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I have opened the 41951A impedance test kit a while ago to see how
it was constructed. But there is really nothing fancy inside. Some
inductors, a few caps...
I uploaded the pictures if anyone is interested.
Of course these pictures are useless to draw a schematic from it.
If better pictures required, I will open the box again. Doing so
the first time was quite a hassle because the screws where glued
in and extremely hard to loosen.
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My initial awareness of the AD eval boards was through a QEX feature article about a 16 bit 100 MHz BW direct sampling SDR built using an AD eval board and a Zed board for ~$1K BoM.
I signed up to get ADs email PR releases and have been blown away by what they are making.
Someone on EEVblog did an extensive evaluation of a Chinese board with a very nice AD part. Unfortunately, I don't recall the part. But the conclusion was the board was crap. I am hoping someone will do some OSHW designs so one is not at the mercy of the Chinese. A set of Gerbers would be fantastic.
Take a look at this part:
Owon is using it in the XDS2102A which is available on Amazon for $400 delivered. The aesthetics and UI are terrible, but it will collect 20 Mpts of 12 bit data at 500 MSa/s. The part is $80 in 100+ and $111 in singles.
I'm working on developing a FOSS DSO FW stack for Zynq and Cyclone V parts. I have *no* FPGA experience and it is quite different from DSP on a general purpose CPU. So lots to learn before it's complete. I just started reading "VLSI DSP Systems" by K.K. Parhi. The EE lexicon is very different from the geophysical lexicon, but except for minor notational differences the math is familiar. My primary concern is word length effects. In seismic we just switch to double precision if word length is an issue.
Because memory BW is critical to seismic DSP you are forced to deal with the CPU at register transfer level to get good performance. So my main concern about doing the work is the quality of Vivado and Quartus. I have lots of scars from $100K/seat exploration software.
A bit off topic, but we are all T&M junkies around here.
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Can anyone tell me if the 8719ES VNA has a CRT or an LCD Display, please?
Peter Worrall
G4GJL
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Re: E8357A upgrade questions
Dr. David Kirkby from Kirkby Microwave Ltd
On Fri, 15 Mar 2019 at 05:15, Caesar Valenti < caesarv@...> wrote: I guess I should have also mentioned that I can provide the CPU and hard drive at no charge.?
If possible it would be useful if you could provide an image that people could use to create a disk. Ideally with some open-source software!?
I would rather see instruments being properly used rather than being dumped in a landfill.
Good news. I find it really sad when someone talks of dumping 8510 systems in the landfill rather than sell them at a lower price than he wants. Or on other occasions would rather scrap items to recover the gold, rather than sell them for more than he will get for the gold.?
You will need to purchase a #2335 lithium button battery ($5) since the existing one is probably dead. This is just for the real time clock.?
Don¡¯t get Keysight to replace the battery. I asked them to change a battery that I was told verbally would be free. Then I received a quote for over ?300 ($500) to replace the battery. After some discussions they agreed to do it for ?99, which still seemed a bit steep, but I accepted.
Dave.
-- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: Looking to connect with other 4396B owners
Of course, there is the HP Journal discussion of the design of the 4396B from YHP.
https://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1993-10.pdf
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Re: Looking to connect with other 4396B owners
I have opened the 41951A impedance test kit a while ago to see how it was constructed. But there is really nothing fancy inside. Some inductors, a few caps...
I uploaded the pictures if anyone is interested.
Of course these pictures are useless to draw a schematic from it. If better pictures required, I will open the box again. Doing so the first time was quite a hassle because the screws where glued in and extremely hard to loosen.
|
Re: Replacement battery for 8566A
The issue is the contacts as it is a drop in pack but I¡¯ve rebuilt them by resoldering those to the weld tab if you¡¯re quick nothing gets too hot at the battery! Adrian Sent from an I-thingy
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On 22 Mar 2019, at 06:28, Stephen Hanselman < kc4sw.io@...> wrote: Batteries plus may be able to weld you up a nicad pack. ?I would not use lithium and remember if you just use alkaline cells to put a diode in series with the batteries to prevent the charging system from damaging the battery Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117?office (775) 720-6020?mobile s.hanselman@...
a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments.
On Mar 21, 2019, at 23:19, Adrian < Adrian@...> wrote: It¡¯s a standard HP calculator nicd pack as used in the HP45 type calculators. There are people selling rebuilt ones in the USA on Ebay. Not as easy in the UK!AdrianSent from an I-thingyOn 22 Mar 2019, at 05:12, Don Bitters via Groups.Io <donbitters@...> wrote:
The original battery pack was a 3 cell battery Ni-Cad @ 4.5v. ?Years ago I could purchase similar sized 1.5v Ni-Cad cells and rebuild the battery pack. ?At this point in time I would simply find a battery pack 5V and under, and wire it in to the to the same placement as the original. ?I have seen multiple 3 cell wireless phone battery packs that would fill the bill as a replacement. The original battery pack and holder is screwed down to the front sub-panel and attached to the RF motherboard via 2 pins. ?If you replace the jacks on the replacement with the ones from the the original case, then zip tie the new battery pack into the old position, and you are done. ?Do check the polarity.
Don Bitters
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Re: Signal Generator Comparison Chart ?
Just a note on the Gigatronics 1026 generators, when working they are pretty good generators - 0.05 mto 26GHz. Harmonics and spurs are almost nonexistent in these units. Flatness is on the order of 1 or 2dB across the entire range on a good unit, all bands are detector leveled. I probably have an e-copy of the service manuals somewhere. There are at least 3 versions of the service manuals over the decades that they were made. There are also some variations that go to 40GHz, I think they were model 1040. Gigatronics really doesn¡¯t want to support them anymore and has dumped much of the documentation.
The RF chain encompasses 3 to 5 YIG oscillators and mixers for up/down conversions to get all of the band coverage. There are 7 modular RF assemblies screwed down to the chassis and connected with non-rigid coax, but all are preformed for fit. There are also at least 7 multi-pole coax switches. The coax plumbing is a real challenge. The power supplies are compact and not real easy to repair as the main supply is directly in front of the fan mounted in heat sinks. There are secondary supplies on circuit cards. The electrolytic caps are problems for leakage with age. There are 14 smallish circuit cards across the back of the unit that are the YIG drive circuitry for each of the YIGs, 2 or 3 are the modulation circuitry. Depending on options you can have AM, FM, and Pulse modulation. Expect to see these as US military surplus. Replacement YIGs can be purchased from MicroTek for about $2-4K each. I have probably repaired 30 or more of these units.
Repairs to the hybrid microcircuits can be done by someone that is knowledgeable in SMT repairs, or National Test Equipment has done some hybrid microcircuit repairs for me in these units.
If you go after this unit and plan to service it yourself then plan to purchase 1 working unit and 1 or 2 parts units. About 60% of the repairs I did were power supply or YIG drive circuitry, the remainder involved the hybrid circuits and SMT repairs mostly pin diode switch replacement due to opens or leakage. I would estimate there are more than 60 SMT RF/uWave pin diode switches in the hybrid circuits. If you have to start replacing hybrids, YIGs, coax switches, and attenuators (Gigatronics, HP, or Wilton branded - all were used at different times and are all of similar construction 0-90dB, 10dB step and 0-12dB, 1dB step), then repairs will get expensive fast. Full alignment is only 2-3 hrs. I checked on eBay(USA), ¡°working¡± units seem to be about $2-4KUSD each. Non working parts units are about $500USD. There are also service manuals available. If you need more info about the Gig 1026 or GT9000 contact me.
Don Bitters
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On Thu, Mar 21, 2019 at 11:21 PM, jafinch78 . wrote:
even more exiting is if a decent board
Entry error typo due to excitement: "...even more exciting is if a decent board..."??
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I have a couple of HP and several avantek units. ?I¡¯ll check the on in the morning Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117?office (775) 720-6020?mobile s.hanselman@...
a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments.
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On Mar 21, 2019, at 20:33, rpoz28cam via Groups.Io < rpoz28cam@...> wrote: Hello group,
I am in need of a HP 5086-7592 Yig oscillator.? I have found many on Ebay but figure with the nature of these things I could end up with a part no better than what I have.? Any advice would be greatly appreciated.
Thank you,
Jon
|
Re: Replacement battery for 8566A
Batteries plus may be able to weld you up a nicad pack. ?I would not use lithium and remember if you just use alkaline cells to put a diode in series with the batteries to prevent the charging system from damaging the battery Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117?office (775) 720-6020?mobile s.hanselman@...
a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments.
toggle quoted message
Show quoted text
On Mar 21, 2019, at 23:19, Adrian < Adrian@...> wrote: It¡¯s a standard HP calculator nicd pack as used in the HP45 type calculators. There are people selling rebuilt ones in the USA on Ebay. Not as easy in the UK!AdrianSent from an I-thingyOn 22 Mar 2019, at 05:12, Don Bitters via Groups.Io <donbitters@...> wrote:
The original battery pack was a 3 cell battery Ni-Cad @ 4.5v. ?Years ago I could purchase similar sized 1.5v Ni-Cad cells and rebuild the battery pack. ?At this point in time I would simply find a battery pack 5V and under, and wire it in to the to the same placement as the original. ?I have seen multiple 3 cell wireless phone battery packs that would fill the bill as a replacement. The original battery pack and holder is screwed down to the front sub-panel and attached to the RF motherboard via 2 pins. ?If you replace the jacks on the replacement with the ones from the the original case, then zip tie the new battery pack into the old position, and you are done. ?Do check the polarity.
Don Bitters
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On Thu, Mar 21, 2019 at 05:09 PM, Reginald Beardsley wrote:
You can get the same performance for 10% or less of the price. That's pretty cool in my book.
That is awesome definitely.? Especially, even more exiting is if a decent board can be made in an even more cost effective module even without all the features like has been done with the older AD chips that can be bought really cost effectively on eBay.?
Reminds me of a great presentation of an application of the ADF4355.? ?
I'll have to look into what the ADF4371 upgrade modularized system looks like sometime... with mixing and harmonics filtering... seems like wow!? Way cool!?
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Re: Replacement battery for 8566A
It¡¯s a standard HP calculator nicd pack as used in the HP45 type calculators. There are people selling rebuilt ones in the USA on Ebay. Not as easy in the UK!
Adrian
Sent from an I-thingy
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On 22 Mar 2019, at 05:12, Don Bitters via Groups.Io <donbitters@...> wrote:
The original battery pack was a 3 cell battery Ni-Cad @ 4.5v. Years ago I could purchase similar sized 1.5v Ni-Cad cells and rebuild the battery pack. At this point in time I would simply find a battery pack 5V and under, and wire it in to the to the same placement as the original. I have seen multiple 3 cell wireless phone battery packs that would fill the bill as a replacement. The original battery pack and holder is screwed down to the front sub-panel and attached to the RF motherboard via 2 pins. If you replace the jacks on the replacement with the ones from the the original case, then zip tie the new battery pack into the old position, and you are done. Do check the polarity.
Don Bitters
|
Re: Replacement battery for 8566A
The original battery pack was a 3 cell battery Ni-Cad @ 4.5v. Years ago I could purchase similar sized 1.5v Ni-Cad cells and rebuild the battery pack. At this point in time I would simply find a battery pack 5V and under, and wire it in to the to the same placement as the original. I have seen multiple 3 cell wireless phone battery packs that would fill the bill as a replacement. The original battery pack and holder is screwed down to the front sub-panel and attached to the RF motherboard via 2 pins. If you replace the jacks on the replacement with the ones from the the original case, then zip tie the new battery pack into the old position, and you are done. Do check the polarity.
Don Bitters
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Re: Replacement battery for 8566A
The battery is just three AA-sized NiCd cells in series, so you could replace it with anything that you can cobble together from similar cells.? Ed
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Replacement battery for 8566A
Hi all,
I have an 8566A system that is in need of a new battery so it doesn't lose it's mind all the time. I understand that, unlike the B models, the battery is behind the front panel. Where can I find a replacement that will work?
Thanks!
Sean
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Hello group,
I am in need of a HP 5086-7592 Yig oscillator.? I have found many on Ebay but figure with the nature of these things I could end up with a part no better than what I have.? Any advice would be greatly appreciated.
Thank you,
Jon
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New phase lock board for 8753ES - qualitative first test
Today I received a new A11 phase lock board for my misbehaving 8753ES (thank you Pete M!).
A lot of measurements will follow as I have lab time, but I thought I'd run a simple "plug it in and hold ears" test.
Test 48 now passes.? The 1 V/GHz waveform test on the analog bus has the same shape as before, but the starting voltage is below 3.5 volts instead of 3.6 as in the original board.
I still have some intermittent lock issues below 10 MHz but this is major progress.
I have a lot to do, including Root Cause Analysis of the failure of the original phase lock board.? Perhaps the precision 6.2 volt reference zener has gone out of tolerance, it would only need to be a few percent off.? I will see.
What this means is that when the troubleshooting guide says the waveform should be as they show, it means literally in this case.? A waveform starting at 3.6 instead of 3.5 volts may cause failure.
Much more to follow!
Peter
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Re: HP8753ES versus HP8753D
Thank you pianovt. I had seen the comparison on that web page at
some point and lost track of it. Just what I was looking for!
Steve, K8JQ
On 3/21/2019 7:01 PM, pianovt via
Groups.Io wrote:
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Pete_G4GJL
jafinch78 .