Re: Convert monochrome 5454x scope to color
Hello, can you fund around one LCD with XY imput? I got one dead HP182T mainframe for my S.A some help please.
Thank you all for some imput.
Francesco.
?
?
Sent:?Wednesday, February 02, 2022 at 11:35 AM
From:?"Bill E" <solartron@...>
To:[email protected]
Subject:?Re: [HP-Agilent-Keysight-equipment] Convert monochrome 5454x scope to color
I looked into this a while back. There are significant differences between the CRT and LCD versions, including different main pcbs. It seems the only practical path would be a hack that would convert the CRT scan signals to LCD usable, but you wouldn't have the color info.
I solved the problem by getting lucky, found a color 54542 on EPray for $199. "Not working". Apparently it wasn't working because the seller never plugged it in or some such, worked perfectly, all in spec. Now I need something to do with my 2 CRT 542s.
|
Re: Convert monochrome 5454x scope to color
I looked into this a while back. There are significant differences between the CRT and LCD versions, including different main pcbs. It seems the only practical path would be a hack that would convert the CRT scan signals to LCD usable, but you wouldn't have the color info.
I solved the problem by getting lucky, found a color 54542 on EPray for $199. "Not working". Apparently it wasn't working because the seller never plugged it in or some such, worked perfectly, all in spec. Now I need something to do with my 2 CRT 542s.
|
Re: HP 5090B Droitwich receiver documentation wanted
I have never seen a 5090B manual but did upload a scan of my 5090A manual to Mediafire some time ago and have just confirmed the link is still good.....
https://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_and_Service.pdf/file
You could also ask on the on the Time-Nuts mailing list, or check their archives, but discussions there when I bought my 5090B in 2010 confirmed one thing I'd already decided from the 5090A manual, that attempted conversion of the unit itself would probably not be a very good idea:-)
At one time I thought perhaps the only difference between the A and B versions might just be the chart recorder on the B but I have seen it suggested there could be other differences, I have not checked that.
Since Droitwich changed frequency in 1988 there have been quite a few articles published offering 198KHz to 200 KHz converters but one I particularly liked used the existing 200KHz frequency locked standard as part of the conversion loop and didn't require any additional tuned circuits.
That was published in RadCom in 1989 and a copy is attached.
If that copy doesn't get through I'd be happy to send it direct but again it's not something I've tried, and probably not likely to now, so can't confirm how effective it might be.
Nigel, GM8PZR
HP 5090B Droitwich receiver documentation wanted
From: Donald Prins
Date: Tue, 01 Feb 2022 19:01:54 GMT
Dear Fellow HP fans,
Would
anybody have documentation of the receiver available? This receiver and
the antenna 15500A provided the standard frequency in the quartz
crystal Philips plant at Doetinchem in the Netherlands till Droitwich
changed to 198kHz. The plan is to build in a converter for 198 to 200kHz
and do the necessary maintenance.
A manual for the B model and information on a converter would be very welkome.
Yours Donald Prins PE1AHJ
|
Re: HP8753C Source Pretune after YIG replacement
I generally try not to kibitz, but your comment about going through the adjustment procedure WITHOUT touching ANYTHING is ABSOLUTELY SPOT ON !!
Quoting peter bunge <bunge.pjp@...>:
toggle quoted message
Show quoted text
Are you sure the YIG is dead? How do you know? I suggest you don't adjust
anything until you know what the problem is.
My method of troubleshooting is to go through the adjustments procedure but
WITHOUT ADJUSTING ANYTHING. Anything way off indicates the problem area.
Often a failure in a closed loop.
Finding a failure in a closed loop can be tricky and requires a
knowledge of the circuit function.
When you have repaired the problem then you can do the adjustments.
Making adjustments without repairing the problem just makes new problems
and it will be much more difficult to identify the fault.
Many HP problems are due to power supply failure.
On Tue, Feb 1, 2022 at 11:24 AM vk2bea via groups.io <vk2bea=
[email protected]> wrote:
I have a dead YIG (5086-7473) in the source of an HP8753C that I am
replacing.
The manual says to do the procedure for setting the 'source pretune
constants correction'.
The section on setting the 'source default correction constants' says that
this must be done before the source pretune; however, this will require me
to set the 'RF Output Power Correction Constants' and I do not have the
equipment for this step (HPIB power meter).
Since I'm just changing the YIG and not the whole source block, do I
really need to reset all the souce default CCs? Can I just do the 'source
pretune constants correction'?
|
Convert monochrome 5454x scope to color
Has anyone converted a monochrome 54540 or 54542 oscilloscope to color. If so what is actually required to do the conversion?
|
Re: HP8753C Source Pretune after YIG replacement
Does replacing the YIG without adjusting anything bring the VNA back to life? If not it possibly isn't a bad YIG.
Are you sure the YIG is dead? How do you know? I suggest you don't adjust anything until you know what the problem is. My method of troubleshooting is to go through the adjustments procedure but WITHOUT ADJUSTING ANYTHING. Anything way off indicates the?problem area. Often a failure in a closed loop. Finding a failure in a closed loop can be tricky and requires a knowledge?of the?circuit function.? When you have repaired the problem then you can do the adjustments. Making adjustments without repairing the problem just makes new problems and it will be much more difficult to identify the fault. Many HP problems are due to power supply failure.
I have a dead YIG (5086-7473) in the source of an HP8753C that I am replacing.
The manual says to do the procedure for setting the 'source pretune constants correction'.?
The section on setting the 'source default correction constants' says that this must be done before the source pretune; however, this will require me to set the 'RF Output Power Correction Constants' and I do not have the equipment for this step (HPIB power meter).
Since I'm just changing the YIG and not the whole source block, do I really need to reset all the souce default CCs? Can I just do the?'source pretune constants correction'?
|
Re: HP8753C Source Pretune after YIG replacement
Are you sure the YIG is dead? How do you know? I suggest you don't adjust anything until you know what the problem is. My method of troubleshooting is to go through the adjustments procedure but WITHOUT ADJUSTING ANYTHING. Anything way off indicates the?problem area. Often a failure in a closed loop. Finding a failure in a closed loop can be tricky and requires a knowledge?of the?circuit function.? When you have repaired the problem then you can do the adjustments. Making adjustments without repairing the problem just makes new problems and it will be much more difficult to identify the fault. Many HP problems are due to power supply failure.
I have a dead YIG (5086-7473) in the source of an HP8753C that I am replacing.
The manual says to do the procedure for setting the 'source pretune constants correction'.?
The section on setting the 'source default correction constants' says that this must be done before the source pretune; however, this will require me to set the 'RF Output Power Correction Constants' and I do not have the equipment for this step (HPIB power meter).
Since I'm just changing the YIG and not the whole source block, do I really need to reset all the souce default CCs? Can I just do the?'source pretune constants correction'?
|
Re: 0.5mm dia pins with solder bucket connection
Been there, done that.? Busted a pin on one of the Viking connectors on the back of a 11713A.? But rather than bother with the connector I just bought another 11713A on eBay for about $40.? Tons on there for dirt cheap these days.? And now I have a parts mule as well.? ? ? ? ? Jim Ford?
Sent from my T-Mobile 4G LTE Device
toggle quoted message
Show quoted text
-------- Original message -------- From: Mark Bielman <mbielman@...> Date: 2/1/22 1:02 PM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] 0.5mm dia pins with solder bucket connection
What are these for? I had to replace a broken pin on one of the Viking connectors on my HP 11713A attenuator controller. Had to buy 50 minimum. Only needed one! No idea if that is what you're looking for. Mark
|
Re: HP85101B: looking for for A7 switching regulator schematic
Bruce,
I have the A25 motherboard connections list and parts list. It appears the schematic may never have been available outside HP and that¡¯s a shame. Thanks for your efforts!
Steve
toggle quoted message
Show quoted text
On Jan 31, 2022, at 5:12 PM, Bruce <bruce@...> wrote:
?OK - I fished out my 8510A CLIP. I have the schematic diagram for A7 85101-6007, and an A25 motherboard connections list. No part number for the BM, but the manual date is 10/84
If this helps, let me knaw and I'll try to get scans done
Cheers!
Bruce
Quoting Steve - Home <steve-krull@...>:
What I am looking for is the schematic for the main board in the 85102. It's not shown in the parts list but I believe it is designated A25. The parts list in the service manual shows part numbers for A24 and A26 but skips A25. In the corner of the main board is part number 85102-600025, which Keysight says is the main board but is obsolete and was replaced by 85102-60229, also obsolete. I've asked for information on the Keysight forum but no response yet.
Thanks for any help!
Steve
On 1/28/2022 11:39 PM, Bruce wrote:
So e-mail him and see if he can fix it.
What board and what pages are you looking for,I may have something.
Cheers!
Bruce
Quoting "tom_iphi via groups.io" <iphi@...>:
Does the Artek manual have a schematic for the IF Detector 85102 main
board?
No, same thing. There is the placement plan with a double page number, but no schematic.
Tom
|
Re: 0.5mm dia pins with solder bucket connection
I need to connect a ribbon cable to a five way 2mm pitch socket on a PCB (Samtec SQT-105-01-F-S) that accepts 0.5mm dia or squarepins, so want something I can use to replace the normal 2.54mm dupont pins. ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Mark Bielman
Sent: 01 February 2022 21:02
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 0.5mm dia pins with solder bucket connection? What are these for?
I had to replace a broken pin on one of the Viking connectors on my HP 11713A attenuator controller.
Had to buy 50 minimum. Only needed one!
No idea if that is what you're looking for.
Mark
|
Re: 0.5mm dia pins with solder bucket connection
What are these for?
I had to replace a broken pin on one of the Viking connectors on my HP 11713A attenuator controller.
Had to buy 50 minimum. Only needed one!
No idea if that is what you're looking for.
Mark
|
HP 5090B Droitwich receiver documentation wanted
Dear Fellow HP fans,
Would anybody have documentation of the receiver available? This receiver and the antenna 15500A provided the standard frequency in the quartz crystal Philips plant at Doetinchem in the Netherlands till Droitwich changed to 198kHz. The plan is to build in a converter for 198 to 200kHz and do the necessary maintenance.
A manual for the B model and information on a converter would be very welkome.
Yours Donald Prins PE1AHJ.
|
Off OP, but along the same lines - is anyone aware of schematics and/or replaceable parts list for the 54522A? Thank you, Radu.?
Could you please upload the schematics to the files section here. I need them to troubleshoot this issue.
Bill N5ZTW
|
Could you please upload the schematics to the files section here. I need them to troubleshoot this issue.
Bill N5ZTW
|
0.5mm dia pins with solder bucket connection
Anyone know of some of these? I only need a few.
Cheers, David
|
HP8753C Source Pretune after YIG replacement
I have a dead YIG (5086-7473) in the source of an HP8753C that I am replacing.
The manual says to do the procedure for setting the 'source pretune constants correction'.?
The section on setting the 'source default correction constants' says that this must be done before the source pretune; however, this will require me to set the 'RF Output Power Correction Constants' and I do not have the equipment for this step (HPIB power meter).
Since I'm just changing the YIG and not the whole source block, do I really need to reset all the souce default CCs? Can I just do the?'source pretune constants correction'?
|
Re: Latest KE5FX utilities released
This is an experimental tweak intended to retrieve PN plots from FieldFox spectrum analyzers, which was requested by a user (but not yet tested, as I haven't heard back from him.)? It is called up with Acquire->Agilent N9900.? No other significant changes for the past few months. ? -- john, KE5FX ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of ??????? ?????
Sent: Tuesday, February 01, 2022 12:18 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Latest KE5FX utilities released? As i see, some code for N9900 support added to pn.cpp, but there is no appropriate menu item in pn.exe
|
Re: Latest KE5FX utilities released
As i see, some code for N9900 support added to pn.cpp, but there is no appropriate menu item in pn.exe
|
Re: Latest KE5FX utilities released
Hi, A new version of GPIB TOOL KIT. ? 
? ? I did not see any list of changes, updates, etc.
Anybody know what's new?
I really only use the Prologix Config tool.
Any updates to that one?
Mark
|
Re: 8015A Pulse Generator ("Parts or Repair")
On Sun, Jan 30, 2022 at 04:52 PM, Mark Bielman wrote:
However, the unit creates a LOT of heat
You could check the +26 volt supply. (If any of the other regulators are feeding a 'short' somewhere... then that voltage is supposed to be pulled down.)? All the regulators are inter-related... so if the 26 volt is down... all the others will be down too. It might be the pass transistors getting hot?
|
Francesco
David C. Partridge
vk2bea