Re: Mating APC 3.5 with APC 2.92 connectors
The Chinese make lots of truly excellent stuff. I've had occasion to work with Chinese engineers a few times over the last decade or so, and I've been very impressed.
However, us stupid Americans continue to think "cheaper is better", and so we keep buying bottom-rung crap. The Chinese, like any smart business people, are happy to fill the need.
The Chinese RF engineer that I worked with swore by on Huber-Suhner connectors.
-Dave
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On 3/3/23 12:14, Bruce wrote: Dave -
THANKS - It is simply uncalled for.? And YES some of the Chinese connectors are of poor quality - but part of the reason is that people insist on low prices.? The Chinese do make some excellent quality machine tools.
Cheers !
Bruce
Quoting Dave McGuire <mcguire@...>:
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
--
Dave McGuire, AK4HZ
New Kensington, PA
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Re: Mating APC 3.5 with APC 2.92 connectors
Calma chicos :) there's no need for inappropriate language here.
Jeff, it has not much to do with the origin it of the parts. There are certain precision SMAs, yes. But they have a similar price tag like a 3.5
However: A cable assembly from a proper manufacturer, for example a Huber Suhner Minibend is at a price of 30 Euros per piece. Usually they are of superb quality, I have seen and used dozens of them. But, with this price there is only limited resource for inspection, so a ooopsie could get out unnoticed. Now, as the law of maximum damage wants, you will for sure screw this cable into your best signal generator. And that's it for the connector.
Precision cables are always checked in my experience. Side note: I use SMAs (from China) up to 40 GHz in my self made semirigids, but I mechanically measured them with one of this connector measure thingies that look like a clock (sorry don't know the name right now).
But we're drifting off, sorry to have this started.
Tom, again, in my experience even the 2.92 to self made SMA transition did lead to proper figures in the VNA (I have a 8510C at home). So, I would not worry as long as the results do not give suspicion. But you know more than enough about VNAs, I don't need to tell you that :)
Cheers, Martin DL8RI Bruce < bruce@...> schrieb am Fr., 3. M?rz 2023, 18:14:
Dave -
THANKS - It is simply uncalled for.? And YES some of the Chinese?
connectors are of poor quality - but part of the reason is that people?
insist on low prices.? The Chinese do make some excellent quality?
machine tools.
Cheers !
Bruce
Quoting Dave McGuire <mcguire@...>:
> On March 3, 2023 11:44:29 AM "Jeff Kruth via "?
> <kmec=[email protected]> 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: No IF latch when input 1G signal into HP 5350B
A12 maybe have damaged according to my test ?.? Tonight below test items have been finished:
1. The voltage on A1 test connector can meet manual value .? 2. The value of powers ?input to A12 are all correct .? 3. Some Diagnostics have been implemented . But no failure .
There are only 2 test have ?not been finished , LO and IF signals test , because my SMB to SMA connector not on hand .But i think the result will be bad .
And i start to look for the sampler , so does anyone have the information about HP5350B A12 module for sale ??
Thanks !
---- Replied Message ----
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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87131A / 70340A hpib compatibility
Suppose I have an application that is picky and has a list of various supported signal generators. Are there anything that’s strictly compatible, with a subset or superset of commands I might be able to use?
it’s a little awkward because it’s 1-20GHz which isn’t a problem for my needs.
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Re: datasheet 1906-0231 on HP8980A
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Re: Mating APC 3.5 with APC 2.92 connectors
Dave -
THANKS - It is simply uncalled for. And YES some of the Chinese connectors are of poor quality - but part of the reason is that people insist on low prices. The Chinese do make some excellent quality machine tools.
Cheers !
Bruce
Quoting Dave McGuire <mcguire@...>:
toggle quoted message
Show quoted text
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
|
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:
?
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
toggle quoted message
Show quoted text
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!
|
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
|
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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Dave McGuire
Martin Rickes
Dr. David Kirkby, Kirkby Microwave Ltd