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Date
Re: HP 6114A - looking for R8A, 15.82K 0.1% 1ppm resistor

 

Radu, that's a great deal then for one-off. I haven't looked for such things in a long time. Ed
Re: HP 6114A - looking for R8A, 15.82K 0.1% 1ppm resistor

 

Note that you can land close enough with some reasonable like 1% 50 ppm common resistors, at least to get it running and make sure that's the only problem before investing in a fancy resistor. You wouldn't want to discover another problem causing it to burn out.
?
Ed
Re: HP 6114A - looking for R8A, 15.82K 0.1% 1ppm resistor

 

They'll also be happy to make it?15.82K, as they're laser-trimming the part to exact value.?


On Sat, Nov 23, 2024 at 5:48?PM Radu Bogdan Dicher via <vondicher=[email protected]> wrote:
Ed,
TCC makes bulk foil (for Vishay) in count one (literally) for about $20-40. For instance, a Z201 which is 0.2ppm TC at 0.1% runs $23.29 plus shipping.?
Radu.?

On Sat, Nov 23, 2024 at 5:43?PM ed breya via <eb=[email protected]> wrote:
Those kind of resistors are custom values and high performance, so a direct replacement will probably need a junked donor unit. You can buy a new custom one but it might cost a couple hundred bucks for one-off in a 1 ppm performance range. But, you never know, so no harm in asking outfits like Vishay what they can do for how much.
?
If you already have a good assortment of similar resistors, or can find enough in standard values, you can make a composite one close enough. 1 ppm/C is a quite high performance (= expensive) resistor. Good luck.
?
Ed
Re: HP 6114A - looking for R8A, 15.82K 0.1% 1ppm resistor

 

Ed,
TCC makes bulk foil (for Vishay) in count one (literally) for about $20-40. For instance, a Z201 which is 0.2ppm TC at 0.1% runs $23.29 plus shipping.?
Radu.?

On Sat, Nov 23, 2024 at 5:43?PM ed breya via <eb=[email protected]> wrote:
Those kind of resistors are custom values and high performance, so a direct replacement will probably need a junked donor unit. You can buy a new custom one but it might cost a couple hundred bucks for one-off in a 1 ppm performance range. But, you never know, so no harm in asking outfits like Vishay what they can do for how much.
?
If you already have a good assortment of similar resistors, or can find enough in standard values, you can make a composite one close enough. 1 ppm/C is a quite high performance (= expensive) resistor. Good luck.
?
Ed
Re: HP 6114A - looking for R8A, 15.82K 0.1% 1ppm resistor

 

Dave,
Depending on how valuable the repair is for you (and hence how much you're willing to invest?in this part), you could consider ordering the resistor from TCC (Texas Components Corporation - ). You?can get your exact value in likely more precision and better TC (), but it isn't what I'd call a cheap?part. They will make this for you at your exact spec in one single count, and these resistors are just about as good as they?get (outside the Fluke's own fabrication world).?
Radu.?

On Sat, Nov 23, 2024 at 2:42?PM Dave Schmidt via <dgschmidt=[email protected]> wrote:
Bought a 6114A a few years ago, as received it was stuck outputting ~ 38V and the meter selector switch was not working.? Bored, I finally decided to get it working last night.? Cleaned the pushbutton selector switches and Amp/Volts selector switch, fired it up and was happy to find it working but the output voltage wasn't correct (too high).? Found the 16V reference reading over 22V.? Ended up finding R8A is completely open on the A2 board.
?
Specs 15.82K 0.1% 1ppm 1/8W resistor.??
?
Anyone know of a source?
Thanks,
Dave
?
Re: HP 6114A - looking for R8A, 15.82K 0.1% 1ppm resistor

 

Those kind of resistors are custom values and high performance, so a direct replacement will probably need a junked donor unit. You can buy a new custom one but it might cost a couple hundred bucks for one-off in a 1 ppm performance range. But, you never know, so no harm in asking outfits like Vishay what they can do for how much.
?
If you already have a good assortment of similar resistors, or can find enough in standard values, you can make a composite one close enough. 1 ppm/C is a quite high performance (= expensive) resistor. Good luck.
?
Ed
HP 6114A - looking for R8A, 15.82K 0.1% 1ppm resistor

 

Bought a 6114A a few years ago, as received it was stuck outputting ~ 38V and the meter selector switch was not working.? Bored, I finally decided to get it working last night.? Cleaned the pushbutton selector switches and Amp/Volts selector switch, fired it up and was happy to find it working but the output voltage wasn't correct (too high).? Found the 16V reference reading over 22V.? Ended up finding R8A is completely open on the A2 board.
?
Specs 15.82K 0.1% 1ppm 1/8W resistor.??
?
Anyone know of a source?
Thanks,
Dave
?
Re: HP 8662A + 8663A Power Supply

 

If one of you don't need anymore a A7A1 Linear board, A7A2 control board or A7A3 inverter board, please let me know. I'm looking for these board for my HP 8663A
?
Best regards
FHTV7
Re: 8920B Receiver Synth "Out of Lock"

 

Ahhh! Don't know why I keep doing that.
Re: 8920B Receiver Synth "Out of Lock"

 

Mark,
It's not 08291-61020.? It is 08921-61020.
--John Gord
?
On Sat, Nov 23, 2024 at 07:58 AM, Mark Bielman wrote:

Yes. Calling Rick on Monday.
?
I'm confused by the part numbers. I was in fact misreading mine: it's 08291-61020. Even with that, HP Parts has no match for that. (?)
?
?
I also looked up 08920-68127 (from the CLIP) and no match.
?
Hopefully Rick can clear this up.
?
In the mean time, will try my sniffer probe and my SA on the faulty board to see what I can see.
?
Mark
?
?
Re: HP8753E / ES

 

I have an HP8753E which I was repairing and because I couldn't find the front window piece, I purchased an HP8753ES parts unit.? ?Currently the E unit (6 GHz) works but the ES unit is just a partial parts unit.
?
As far as I can tell, the main difference between these units are:
?
1)? The LCD and LCD holder.? Seperate post on this, but the E has a Sharp LQ9D340 (7.5 mm thick) and the 8753ES uses the Sharp LQ084V1DG41? (12 mm thick).? The latter display is easier to fix (backlight issues), brighter, and higher contrast (in addition to being cheaper).? The LCD holders (plastic part on the back) are also different to accomidate the different thickness of display.
2)? The keypad layouts, including extra keys on the 8753ES.
?
All of this begs the question, can I easily make the E unit into an ES?? Is it merely a matter of swapping the front pannel assembly and downloading 8753ES SW into an E unit to make the switch?? If not, do I need to swap the mother boards (which would be a bit of a pain), or is there a specific chip that I could swap instead?? Looking for insight into the easiest way to make this transition.
Re: 8920B Receiver Synth "Out of Lock"

 

Yes. Calling Rick on Monday.
?
I'm confused by the part numbers. I was in fact misreading mine: it's 08291-61020. Even with that, HP Parts has no match for that. (?)
?
?
I also looked up 08920-68127 (from the CLIP) and no match.
?
Hopefully Rick can clear this up.
?
In the mean time, will try my sniffer probe and my SA on the faulty board to see what I can see.
?
Mark
?
?
Re: N8973A Firmware Update issue

 

Dear All,?
?
today I was successfull in updating the NFA. Obviously the Windows 11 created disks are not readable for the N8973A.
?
Beside of Antoine's hint to use a XP based computer (which worked) I was also succesfull to use the "Winimage" software by setting the format to DOS 5.0 / NT / XP and inserting the downloaded files.?
?
Maybe this can be a help for others having update needs on those instruments.?
?
Special thanks to Antoine and Vladan for the offered support.?
?
best regards, Olaf, DL8EBL
Link :?
?
?
Re: 8341B fan replacement?

 

开云体育

Look like that will work, thanks.

Gary

From: [email protected] <[email protected]> On Behalf Of Steve - Home via groups.io
Sent: Friday, November 22, 2024 6:24 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 8341B fan replacement?

?

Gary,

?

For filter material I use McMaster-Carr 2195K305, “Mildew-resistant reusable air filter roll, 1/8” thick, 60 pores per inch”

?

73,

?

Steve

WB0DBS

?

?



On Nov 22, 2024, at 4:14?PM, Gary Hitchner via groups.io <talgarth@...> wrote:

?

Group,

Sounds like the fan in my 8341B needs replacement. After some searching it appears there is a replacement listed on Mouser, that has been used, an Orion fan. Part number 670-OA172SAP112TB.

Would anybody know if this is the best or closest replacement available? ??The fan currently in there is a Fulmer fan, part no. 00 , didn’t find anything searching for this manufacture or P/N.

Also, there was no filter installed, is there a preferred material to make a new filter?

I am going to clean some dust and dirt near the back with a soft brush and a little air, but don’t plan on taking anything apart to clean.

Thanks for help,

Gary

WA2OMY

?
Re: Troubleshooting a 8591e with opt 130

 

Yves,
?
Since I missed the notification of your last post, just a quick update to clarify.
I restored the board, just using the original resistors.
No change in function of the SA was observed though.?
I did the measurements with the restored board, the results are in post Re: Troubleshooting a 8591e with opt 130
Guess it seems the error is not in the Log amplifier board, would you agree?
?
Marco
?
Re: 8920B Receiver Synth "Out of Lock"

 

Talk to Rick at Amtronix.
.
He has sparesand repair services.
Are you sure about the part numbers? Keysight say that is a cable
Could be 08920-61820? or 08921-61828
?
Re: Troubleshooting a 8591e with opt 130

 

开云体育

Marco,

?

Comparison between your board, my board and part list version E

?

Part list E version

For R93 ??5.62k 1%?

For R101 5.62k 1%

?

Your board without modif (8591E)

For R93 ??5.62k 1%?

For R101 5.62k 1%

?

My board (8595E)

For R93 ??4.22k 1%?

For R101 4.22k 1%

?

On schematic version E, R93 and R101 are 5.62K

On schematic version A, R93 and R101 are 4.64K

But I think that these values are pre-selected.

-------

?

Part list E version

For R24 1.21k 1%?

For R25 1.21k 1%

For R26 1.21k 1%

?

Your board without modif (8591E)

For R24 1.21k 1%?

For R25 1.21k 1%

For R26 1.21k 1%

?

My board ?(8595E)

For R24 1.21k 1%?

For R25 1.21k 1%

For R26 1.21k 1%

?

Resetting to its original state is the obvious thing to do.

After your series of tests, you will be able to better understand if there is a problem.

?

Yves

?
Re: 8341B fan replacement?

 

开云体育

Gary,

For filter material I use McMaster-Carr 2195K305, “Mildew-resistant reusable air filter roll, 1/8” thick, 60 pores per inch”

73,

Steve
WB0DBS



On Nov 22, 2024, at 4:14?PM, Gary Hitchner via groups.io <talgarth@...> wrote:

?

Group,

Sounds like the fan in my 8341B needs replacement. After some searching it appears there is a replacement listed on Mouser, that has been used, an Orion fan. Part number 670-OA172SAP112TB.

Would anybody know if this is the best or closest replacement available? ??The fan currently in there is a Fulmer fan, part no. 00 , didn’t find anything searching for this manufacture or P/N.

Also, there was no filter installed, is there a preferred material to make a new filter?

I am going to clean some dust and dirt near the back with a soft brush and a little air, but don’t plan on taking anything apart to clean.

Thanks for help,

Gary

WA2OMY

?
Re: 8341B fan replacement?

 

开云体育

There is some discussion on this on other forums, I am considering the lower RPM, fan.? Not pleased about the tight fit on the height, but it appears to be the only one available.

I guess these motors/ bearings are sealed?? I haven’t removed the fan yet.

?

Gary

?

?

From: [email protected] <[email protected]> On Behalf Of pianovt via groups.io
Sent: Friday, November 22, 2024 6:00 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 8341B fan replacement?

?

Gary, check this out:

?

?

I wonder if the 1350 / 1700 rpm model is good enough for room temperature operation.

?

Vladan
Re: 8341B fan replacement?

 

Gary, check this out:
?
?
I wonder if the 1350 / 1700 rpm model is good enough for room temperature operation.
?
Vladan
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