Re: Mating APC 3.5 with APC 2.92 connectors
On March 3, 2023 11:44:29 AM "Jeff Kruth via groups.io" <kmec@...> wrote: Of course, this does not include Chink SMA's as they are crap, but real, SMA's made to Mil-spec standards, like OSM,Weinschel, Narda, etc.J. Kruth Jeff! There will be NO (Zero, NADA) racism on this mailing list. -Dave, moderator -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Mating APC 3.5 with APC 2.92 connectors
REALLY Jeff -
I DO NOT SEE THE NEED FOR THE USE OF DIVISIVE NAME CALLING. It s OK (IMO) to call out CHINESE connectors of poor quality, it is ABSOLUTELY UNACCEPTABLE IN THIS FORUM TO USE THAT TERM.
Cheers ??
Bruce
Quoting "Jeff Kruth via groups.io" <kmec@...>:
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?Way back when in 1986,when I first purchased 2.92 Connectors from Wiltron ( the inventor, which was why HP did the 2.4, cause they couldnt stand buying connector from their competitor, Wiltron), Wiltron assured me that the 2.92 was backwards compatible to the APC-3.5 and the SMA. Of course, this does not include Chink SMA's as they are crap, but real, SMA's made to Mil-spec standards, like OSM,Weinschel, Narda, etc.J. Kruth
In a message dated 3/3/2023 11:36:00 AM Eastern Standard Time, drkirkby@... writes:?On Fri, 3 Mar 2023 at 16:23, Dr. David Kirkby <drkirkby@...> wrote:
?This might be the paper I was thinking of.??
?No, that wasn’t the paper. There is one giving corrections between 2.92 and 3.5 mm, but ?concludes not to bother trying to correct with SMA.?
?
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
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Re: Mating APC 3.5 with APC 2.92 connectors
?
Way back when in 1986,when I first purchased 2.92 Connectors from Wiltron ( the inventor, which was why HP did the 2.4, cause they couldnt stand buying connector from their competitor, Wiltron), Wiltron assured me that the 2.92 was backwards compatible to the APC-3.5 and the SMA. Of course, this does not include Chink SMA's as they are crap, but real, SMA's made to Mil-spec standards, like OSM,Weinschel, Narda, etc.
J. Kruth
In a message dated 3/3/2023 11:36:00 AM Eastern Standard Time, drkirkby@... writes:
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On Fri, 3 Mar 2023 at 16:23, Dr. David Kirkby < drkirkby@...> wrote:
?
This might be the paper I was thinking of.?
?
?
No, that wasn’t the paper. There is one giving corrections between 2.92 and 3.5 mm, but ?concludes not to bother trying to correct with SMA.?
--
Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@...Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
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Re: Mating APC 3.5 with APC 2.92 connectors
On Fri, 3 Mar 2023 at 16:23, Dr. David Kirkby < drkirkby@...> wrote:
This might be the paper I was thinking of.?
No, that wasn’t the paper. There is one giving corrections between 2.92 and 3.5 mm, but ?concludes not to bother trying to correct with SMA.? -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@...Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
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Re: Mating APC 3.5 with APC 2.92 connectors
Hi,
unless you do some very critical work and need to see 50dB of matching... :) I'd say it will not matter in practical terms. I have never "seen" the transition in normal work?
And never directly mate SMA and 2.92. The tolerances of SMA are so high, it might damage the 2.92 (esp. female).
Cheers, Martin Dr. David Kirkby, Kirkby Microwave Ltd < drkirkby@...> schrieb am Fr., 3. M?rz 2023, 17:23:
Hi,
I know that APC 3.5mm and APC 2.92mm connectors mechanically mate.
What I would like to know:
What is the electrical impact of doing so?
Background:
I had the chance to measure some 3,5mm DUTs on a PNA-X up to 34GHz. But there was only a 2.92mm cal kit available.
How much trust can I put into the thus obtained measurements?
Thanks,
Tom DG8SAQ
There’s not much difference. You can model the transition as a shunt capacitor, the value of which I don’t know ????
?I can not recall the format of the data, but the calibration kit definitions of the Keysight 85052B does have some information on correcting for it. But it’s not as simple as just using a new set of coefficients.?
There is a paper on this topic, which also discusses SMA. The conclusion on SMA is that there’s too much variability on SMA to make any correction worthwhile. A google search of SMA/2.92 mm might get the paper. It should generate a lot less hits than 3.5 mm SMA
This might be the paper I was thinking of.?
Dave.?
Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@...Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
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Re: Mating APC 3.5 with APC 2.92 connectors
Hi,
I know that APC 3.5mm and APC 2.92mm connectors mechanically mate.
What I would like to know:
What is the electrical impact of doing so?
Background:
I had the chance to measure some 3,5mm DUTs on a PNA-X up to 34GHz. But there was only a 2.92mm cal kit available.
How much trust can I put into the thus obtained measurements?
Thanks,
Tom DG8SAQ
There’s not much difference. You can model the transition as a shunt capacitor, the value of which I don’t know ????
?I can not recall the format of the data, but the calibration kit definitions of the Keysight 85052B does have some information on correcting for it. But it’s not as simple as just using a new set of coefficients.?
There is a paper on this topic, which also discusses SMA. The conclusion on SMA is that there’s too much variability on SMA to make any correction worthwhile. A google search of SMA/2.92 mm might get the paper. It should generate a lot less hits than 3.5 mm SMA
This might be the paper I was thinking of.?
Dave.? -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@...Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
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One thing I should also mention is the IF out connection on the rear of your 8593 should be terminated to 50 ohms when not being used. I noted on mine I would get level errors if it was left floating.
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For adjusting the LODA in you 8593, refer to the service guide for 8590 series analyzers, assembly level repair manual. Pages 139-141 for options 09/10.
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Re: No IF latch when input 1G signal into HP 5350B
Dear Askild
Thanks for your help ! I am reading service manual now . And one 26.5Ghz spectrum analyzer and one 500Mhz oscillascope are on my hand .? So i think i will check the power ,signal ?according to the manual step by step .
---- Replied Message ----
Hi Samba,
Do you have the service manual? Have you read the trouble shooting section? Please be careful around the sampler, as it is a sensitive device.
I would follow the trouble shooting, and first check the DC voltages for voltage within the required range, and also check for ripple.
Next would be to check the LO signal. Notice this is around 14dBm, so use attenuators. What test equipment do you have? (spectrum analyzer, oscilloscope with 500MHz band with, frequency counter, power meter and so on.)
Regards, Askild
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On Thu, Mar 2, 2023 at 5:10?PM wlk-0001 < wlk-0001@...> wrote:
Dear All
I need ?some help about HP 5350B . NO IF LATCH led and NOT PHASE LATCHED led are all on when 1Ghz signal input to INPUT 1 connector .? And It can be measured well when 500Mhz signal input to INPUT 2 connector . So i want to know if the GaAs Sampler has damaged and how to check .?
Thanks!
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Mating APC 3.5 with APC 2.92 connectors
Hi,
I know that APC 3.5mm and APC 2.92mm connectors mechanically mate.
What I would like to know:
What is the electrical impact of doing so?
Background:
I had the chance to measure some 3,5mm DUTs on a PNA-X up to 34GHz. But there was only a 2.92mm cal kit available.
How much trust can I put into the thus obtained measurements?
Thanks,
Tom DG8SAQ
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On Fri, Mar 3, 2023 at 01:26 AM, Jeremy B wrote:
I will have to look through the manual to refresh my memory. I do know it’s wasn’t particularly difficult to set up. The hardest part was installing the hardware.
hello Jeremy, well ok for your answer I will still look on my side if I find the manual for the installation of option 009-010 for the hp 8593e and yes well ok for the installation of the mechanics which is quite strenuous but you have to take the time.
thank you again Joel ON4LJ
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Re: datasheet 1906-0231 on HP8980A
It is a 200V 15A avg rectified current 60A surge Common Cathode center-tapped rectifier diode.? Let me know if these are not helpful.?  Clay
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The “1906-“ prefix would indicate it is a varactor or thyristor the R712 reference designator indicates it is a resistive device. HP, Agilent, Keysight prefixes 1902-, 1906- are generally diode devices, rather than transistors.
NSN: 5961-01-135-1330 | Model: 1906-0231 Two or more diode semiconductor devices designed to function as a unit in changing alternating current to direct current. The diode devices are internally connected in series, and are permanently cased, encapsulated, potted, or molded together to form an inseparable unit. These units may be designed as either half-wave or full-wave rectifiers and may be mounted to form either single phase or three phase bridges. For interconnected items arranged in stac (s), see rectifier, semiconductor device. For items fabricated in the form of a monolithic or thin film structure that perform the function of a circuit, see integrated circuit (as modified) . Excludes semiconductor devices, unitized; semiconductor device assembly; and rectifier network, unitized. NATO Stock Number 5961-01-135-1330 Overall Length 1.573 inches? Overall Height 0.450 inches? Overall Width 1.050 inches? Circuit Connection Style Designator Center tap 1 phase Absolute Maximum Voltage Rating In Volts Per Characteristic 200.0 peak inverse voltage Absolute Maximum Current Rating Per Characteristic 15.00 amperes average forward current averaged over a full 60-hz cycle Material Silicon Terminal Type And Quantity 2 pin
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I will have to look through the manual to refresh my memory. I do know it’s wasn’t particularly difficult to set up. The hardest part was installing the hardware.
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Re: HP 3457A FET Transistors
Nice! I recently got one of those, quite by accident, along with the rest of the components for that interferometer system. It's really neat stuff.
-Dave
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On 3/2/23 03:27, Adrian Nicol wrote: Now that's a plan! I just won a non-functioning HP 5518A Laser head for 200 bucks because I'd always wanted to play with one and was really looking forward to trying to fix it and find out how they worked....changed the (intact looking) fuse but which measured around 250k Ohms...... and the darn thing lit up, locked and worked pretty much to spec.....Oh rats!
Adrian
On 02/03/2023 04:17, Dave McGuire wrote:
I know!? I thought about asking a neighbor to come over and break it, and not tell me how.
--
Dave McGuire, AK4HZ
New Kensington, PA
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Re: Video Information for the Wiki
Hi Zentronics
IMO, I am against it; but, if you can do it, I think anyone should be able to do it, as well.?
Some of the reason for that is... well... YouTubers make money... from video views, and the rest of us posting here don't.?
I think if the list is going to be monitized; then that should benefit the list.?
One could argue that the members proposal does benefit the list; but, that's an argument I haven't seen.
Maybe the List should have it. (Maybe the Mods will decide.)
Please let me know what you all think.
Best regards and wishes.
Roy
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Re: HP 3457A FET Transistors
OK, thank you for the valuable input, appreciated ? Best Regards ? CRAIG MAYFIELD | Director - Particle & Environmental Technologies ?
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From: [email protected] <[email protected]> On Behalf Of fenugrec@...
Sent: Friday, 3 March 2023 1:20 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 3457A FET Transistors? > I will get some on order
J3xx fet's should be (used to be ?) pretty cheap, I suggest getting quite a few more than required in case you need to do some matching or parameter binning for e.g. Idss , Vgs etc...
PS Craig, if you could disable your email signature for this list that would be nice; it comes with a bunch of attached images which is annoying and takes longer to load...
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On Thu, Mar 2, 2023 at 10:41?AM Greg Muir via <big_sky_explorer= [email protected]> wrote: It is CR19, part of the 5-volt rectifier circuit in the power supply assembly A22.? The HP description for part number 1906-0231 is “DIODE-CT-RECT 200V 15A.”?
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Looks like a fairly simple device to substitute with discrete diodes except that the high current rating might take some thermal consideration unless you can measure the actual current in that circuit and determine if the total current draw is small enough so as to? use them without any heat sinking.
?
If you have only lost one leg of the diode pair it shouldn’t be too difficult to determine pin out with an ohmmeter.? From the way the schematic is drawn it looks like the case is the common between the two diodes.
?
Varo and a few other manufacturers were well known for their “creative packaging” of some of their devices.? This apparently was one of them.
?
A portion of the schematic is attached.
?
Greg
-- Ken H.
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It is CR19, part of the 5-volt rectifier circuit in the power supply assembly A22.? The HP description for part number 1906-0231 is “DIODE-CT-RECT 200V 15A.”?
?
Looks like a fairly simple device to substitute with discrete diodes except that the high current rating might take some thermal consideration unless you can measure the actual current in that circuit and determine if the total current draw is small enough so as to? use them without any heat sinking.
?
If you have only lost one leg of the diode pair it shouldn’t be too difficult to determine pin out with an ohmmeter.? From the way the schematic is drawn it looks like the case is the common between the two diodes.
?
Varo and a few other manufacturers were well known for their “creative packaging” of some of their devices.? This apparently was one of them.
?
A portion of the schematic is attached.
?
Greg
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Re: datasheet 1906-0231 on HP8980A
Keysight gives this:
Diode-Rectifier dual VR-200V IF-15A
Hello
?
I can't find any information on the component in the TO-3 case from power Supply HP8980A
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It is written on it:
CSC
1906-0231
9046
?
THANKS
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Dave McGuire
Dr. David Kirkby, Kirkby Microwave Ltd
Martin Rickes
Michael A. Terrell