Re: low amplitude readings below 10MHz on a 8591E
That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
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Re: low amplitude readings below 10MHz on a 8591E
Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN
Gr. Kees
Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
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Re: low amplitude readings below 10MHz on a 8591E
Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
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Re: low amplitude readings below 10MHz on a 8591E
Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded.
Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell or is too premature.
Gr Kees
Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
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HP 3585B Looking for mating connector
Does anyone in the group know or have a part number for a mating power connector for the probe power receptacle on the HP3585B. The manual only gives the part number for the receptacle. ?I think it¡¯s also similar to the power connector on the 8590 series analyzers. ?This is the low voltage connector used to power things like active probes. Thanks.
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Re: Fixed my HP 5345A today!!
One very minor point, if I may, could the Marconi Sig Gen be a 2042?
There were no 404x anything in the Marconi range as far as I am aware... Unless you have discovered something magically unknown. Just being picky ? Regards Nigel Adams - Marconi Instruments Heritage Collection? by banging a nail into a piece of wood...
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On 20 Mar 2023, at 05:13, ChrisBeee via < chrisbeee@...> wrote: ---with a Marconi 4042 signal generator is not going to be rolling anywhere now its sunk into the carpet. ---
...reminds me of the movie 'China Syndrome' :-)
Even large dual caster wheels waive the white flag here, don't ask me how I know...
Chris
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Re: Fixed my HP 5345A today!!
---with a Marconi 4042 signal generator is not going to be rolling anywhere now its sunk into the carpet. ---
...reminds me of the movie 'China Syndrome' :-)
Even large dual caster wheels waive the white flag here, don't ask me how I know...
Chris
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Re: Fixed my HP 5345A today!!
Hi guys,
Now here is a topic I can really relate to being 71 nearing 72.? ?Who needs to go to the gym?
Lifting HP 70,000 mainframes Tek scopes and other test gear on to the top shelf of my test bench in the screened room is "interesting".? What could possibly go wrong?
Then you have to climb up on the bench to get at the cables at the back.? power/reference and HPIB.
The mobile mini-trolley at the side of the test bench loaded with H/P DC power supply, H/P 8642M, HP8663A, H/P70004 mainframe plus 2x HP70001 mainframes fully loaded as a 4 function test system and topped off with a Marconi 4042 signal generator is not going to be rolling anywhere now its sunk into the carpet.? But I can at least walk around the back to change/check the connections. One plus side is the H/P 70,000s are modular so I can swap out a module if the unit has issues.
cheers Noel (from Australia down under)
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Hello Lionel ? I have a couple of 5328A s that I did work on ¨C including fitting with overnised oscillators.? They have some of the options you have.? One thing you need to be aware of is that some of the options require a different ROM to be fitted to the counter.? I think there are 2 or 3 variants. I can¡¯t remember which option combinations require which ROM but it is explained in the manuals for the different options. ? I certainly moved around a couple of the options in my counters (including option 041 and 031), but I did at one point have to find a different ROM. ? Regards ? Kerry ? ? ? ? I had two working frequency counters HP5328A: - one with the 500 MHz C channel and a digital voltmeter (the one with auto DCV range, a filter switch, and two push buttons to read A and B levels), a basic crystal oscillator, serial number 1620A01301 (thus from 1976, I think). - one with only channels A and B and a simpler digital voltmeter (one switch to select from ¡°DVM¡±, ¡°read A¡± or ¡°read B¡±), and the stable crystal oscillator 10544A serial number 2004A13960 (1980, I think). ? The first one (with the C channel) stopped working when I moved with my family. I started investigating and have already found two problems (a faulty -15V regulator, and a 15uF 20V capacitor in short circuit). ? Even though I intend to fix the one with the C channel, I would like to know if I could transfer: - the C channel card - the fancy DVM card to the working unit 2004A13960? ? The purpose would be to have at least one fully working unit while I am fixing the other. ? Note: I have also been given a non-working HP5328A (refurbished military model TS-3662/U), serial number 1844A09539, with a C channel. Would this C channel be compatible with my 2004A13960 unit? ? Regards, Lionel
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89441A repair: Is hp YIG 5087-7082 (A50 for 89431A) equivalent to Agilent Y092-2300 (0955-0747)?
A while ago I acquired a fairly beaten-up 89441A that showed quite a lot of error messages upon powering up. The repair turned out to be a way longer journey than expected, lacking a CLIP and given the fact that these newer instruments use a variety of high density connectors instead of old-school edge connectors. With none of the unobtainium extenders at hand, every measurement required pulling the card, hard-wiring the test point to the PCA and put it back. At least the contacts are clean now...
After swapping out a defective A10 board (dead input hybrid) and repairing a couple of other defects on A33 and A35, the 89410A came back to life and I went crazy with a second channel by adding a A10/A20 and changing a jumper on the trigger board. Also, I performed a SW upgrade for the complete set of options (see related descriptions on the inter-web...). The 89410A now works perfectly fine.
Not so the 89431A... After replacing the A82 Reference Oscillator and the A91 Digital Control PCAs, the last step seems to be to replace a weak A50 YIG before I give it a try and run the factory calibration. As per service manual, the YIG should put out +14dBm over the entire tuning range. To check that, I hooked up a 8566B (with a 20dB attenuator out of an abundance of caution) at the output of A50 and it turned out that it actually starts with -21dBm at 3.05GHz and ends up somewhere in the woods with -63dBm at 5.796GHz. On the other hand, amplifying the signal with a 8349A improves the situation quite a bit (far from perfect, though). Looks like the YIG is toast. But even though leaving the 8349A aside the 89431A looks cool, it does not really make sense in the long term. Used 5087-7082 units in working condition seem to be scarce, but there might be more options if is hp YIG 5087-7082 (A50 for 89431A) equivalent to Agilent Y092-2300 (0955-0747). They both have the same tuning range, but I did not find the respective datasheets to compare their coil current to frequency curves. Does anybody have an idea?
On the other hand: if someone has a 5087-7082 YIG laying around, preferably but not exclusively somewhere in Europe, I would be glad to get an offer.
Your help is be very appreciated!
Cheers
Chris
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Re: HP 8594E low signal level indicated
Update:
I bought an entire front end assembly for $149 on eBay. Today I resumed troubleshooting and confirmed good level of 3.9214 gHz into 2nd Converter (A3A4), but very weak 321.4 mHz out. I used my tinySA Ultra to look at those signals.
I laid the used front end assembly on top of it and moved the connections from the original 2nd converter over to the one on the front end I bought, and now the levels of signals on the screen look great!
So, now I just need to do the mechanical swap of the 2nd converters and calibrate.
Rik
WA4BAN
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Sorry to hijack this thread in the first place, On Sun, Mar 19, 2023 at 8:51?PM Radu Bogdan Dicher <vondicher@...> wrote:
Lionel,
I have one on duty at the bench with 1.3GHz Channel C (I found it to be good to about 1.65GHz), the enhanced DMM, ovenized reference, two channels with the better front end, and I also have another three units for parts.\
could you tell me please the part number of the sequencer ROM (the 256 x 16 bit 1818-xxxx which is on the mainboard near the display)? I've repaired quite a few 3528A/B but I've never found (and dumped its sequencer ROM) of a DMM+1.3 GHz unit. I'm not sure it's different than the one needed for 1.3GHz channel C, but as I said, I've never found such a unit with all the options. Thanks in advance. Frank IZ8DWF
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Lionel, I have one on duty at the bench with 1.3GHz Channel C (I found it to be good to about 1.65GHz), the enhanced DMM, ovenized reference, two channels with the better front end, and I also have another three units for parts. I know the previous?owner swapped parts and modules, and I think the working one in duty is a compounded unit from the best parts and modules available to him. BTW - I'm ever so grateful?to him for making these and other units available to me. I don't have direct experience with this swapping, but I think you have a pretty wide range of possibilities to work?with. I'd just peruse the SM in detail to figure out what works and what may not.? Radu.?
On Sun, Mar 19, 2023 at 12:40?PM Lionel_C via <lionel.cordesses= [email protected]> wrote: I had two working frequency counters HP5328A:
- one with the 500 MHz C channel and a digital voltmeter (the one with auto DCV range, a filter switch, and two push buttons to read A and B levels), a basic crystal oscillator, serial number 1620A01301 (thus from 1976, I think).
- one with only channels A and B and a simpler digital voltmeter (one switch to select from ¡°DVM¡±, ¡°read A¡± or ¡°read B¡±), and the stable crystal oscillator 10544A serial number 2004A13960 (1980, I think).
?
The first one (with the C channel) stopped working when I moved with my family. I started investigating and have already found two problems (a faulty -15V regulator, and a 15uF 20V capacitor in short circuit).
?
Even though I intend to fix the one with the C channel, I would like to know if I could transfer:
- the C channel card
- the fancy DVM card
to the working unit 2004A13960?
?
The purpose would be to have at least one fully working unit while I am fixing the other.
?
Note: I have also been given a non-working HP5328A (refurbished military model TS-3662/U), serial number 1844A09539, with a C channel. Would this C channel be compatible with my 2004A13960 unit?
?
Regards,
Lionel
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I had two working frequency counters HP5328A:
- one with the 500 MHz C channel and a digital voltmeter (the one with auto DCV range, a filter switch, and two push buttons to read A and B levels), a basic crystal oscillator, serial number 1620A01301 (thus from 1976, I think).
- one with only channels A and B and a simpler digital voltmeter (one switch to select from ¡°DVM¡±, ¡°read A¡± or ¡°read B¡±), and the stable crystal oscillator 10544A serial number 2004A13960 (1980, I think).
?
The first one (with the C channel) stopped working when I moved with my family. I started investigating and have already found two problems (a faulty -15V regulator, and a 15uF 20V capacitor in short circuit).
?
Even though I intend to fix the one with the C channel, I would like to know if I could transfer:
- the C channel card
- the fancy DVM card
to the working unit 2004A13960?
?
The purpose would be to have at least one fully working unit while I am fixing the other.
?
Note: I have also been given a non-working HP5328A (refurbished military model TS-3662/U), serial number 1844A09539, with a C channel. Would this C channel be compatible with my 2004A13960 unit?
?
Regards,
Lionel
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Re: Fixed my HP 5345A today!!
Impressive work! Lifting a Super-Pro, I mean. I¡¯m 76, not sure I could do that any more, if I had one, which I don¡¯t any more.?
On Sun, Mar 19, 2023 at 6:34 AM PAUL KOBY < paulkoby@...> wrote: I am 72. I pulled a Hammarlund SP-600 of the shelf to test and could not get a sound out of it. I went so far as to hook a signal generator to it and started tracing the signal through the unit. Traced it all the way to the Receive/ Transmit switch which was set to transmit. Problem solved after 2-3 hours of checking. DUH!
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Re: E4407B Step Attenuator
The 30 dB pad part number is 1GT1-2866 and is used on a wide variety of attenuators. However, unless the input was overloaded, the typical failure is the 5060-0342 push rod assembly. Check the O rings first. Both parts are orderable.
I am just about done resurrecting a E4407B that I just acquired. The last issue is the RF step attenuator. Stepping from 0dB to 25dB in 5 dB steps works fine. All steps above 25dB fail. I suspect that this attenuator has 4 pads:
5dB,10dB,20dB and 30dB
I suspect that the 30dB pad is bad. Does anyone have 30dB pads for these or have an attenuator where the 30dB pad is good? This is a DC-26.5GHz attenuator.
Thanks!
Sam
W3OHM
--
Ken H.
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Re: Fixed my HP 5345A today!!
I am 72. I pulled a Hammarlund SP-600 of the shelf to test and could not get a sound out of it. I went so far as to hook a signal generator to it and started tracing the signal through the unit. Traced it all the way to the Receive/ Transmit switch which was set to transmit. Problem solved after 2-3 hours of checking. DUH!
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Re: Fixed my HP 5345A today!!
As I reach 70 its becoming clearer that I will age out before I get to all the HP and Tek gear on the ¡°to repair¡± shelves in my shop. ?I do appreciate the ¡°smells¡± ?of the boat anchor tube era HP gear still working but that I rarely use today. ??
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Fixed my HP 5345A today!!
Every few months I like to fire up the seldom used HP gear on the workbench.? I really love listening to the Pratt and Whitney jet engines used to cool my HP 8345A.? Being elderly and getting deafer the thrill is diminishing, however.... so I fire the beast up and let her cook for a few minutes... hook it to my 8660D just to do some quite checks.? The ranges all work, except the 100uS gate is showing a horrible .8.8.8.8.8. display. Ackkk!? Run down cellar and I am relieved to find that I did save a 5345A donor carcass.? Four hours later after swapping the front panel, and the boards, the problem is not cleared.? Pouring through the ponderous set of HP 5345A manuals provides little relief...? after some thought I come to realize the counter is fine.? The idiot owner forgot that the default power up for the 8660D is 1 MHz.? Hook her up to my never used or needed 8665A and it works perfectly.? The older I get the more I scare myself.? Any other seniors having special moments??? Peter
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Re: low amplitude readings below 10MHz on a 8591E
Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
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Noel VK3NH
Rik Rasmussen WA4BAN
Jeremy Nichols