¿ªÔÆÌåÓý

  1. HP-Agilent-Keysight-Equipment
  2. Messages
Expanded Topics Messages
Date
Re: Question: Dielectric ( Loss Tangent, etc. ) measurement of a solid insulator, Ceramic, Delrin, Nylon, HDPE ...

 

My first thought is at 1.5" long, you will need to cut slices to do any measurements.
?Putting caps on a 1.5" long material with a dielectric constant of 2.2 is getting in the 2.5 femtofarad range.
?Measuring a femtofarad is a challenge but then to measure the loss of that is ??\_(¥Ä)_/?.
?Your getting to use the big boy toys to do that at those high frequencies.
?
????????????????????????????????? Mikek
HP 8601A for sale

 

Is there any interest in this forum to buy an 8601A calibrated for $450.00?
Hp8350B manuals

 

I was looking on the internet to find and download an operation and service manual (as many parts of it I find) for
?
my Hp8350b Sweeper the prefix number is, 2512A
?
The only manual I have found is 08350-90092 but is not covering my instrument.
?
Does anyone know where to find for download a manual before part number 08350-90072, printed Oct 1986.
?
A manual that covers Hp8350B with prefix 2512A.
?
Thank you
Re: Question: Dielectric ( Loss Tangent, etc. ) measurement of a solid insulator, Ceramic, Delrin, Nylon, HDPE ...

 

On Sat, 27 Jul 2024 at 21:17, gren via <hrgerson=[email protected]> wrote:
?
Question:
? Has anyone used an? LCR meter? to measure Dielectric Loss for a solid insulator ?
?
Yes, I have done it several times.?

?
( Ceramic, Delrin, Nylon, HDPE ... ) for use at frequencies between 0.3 to 4 GHz , for a particular application.
?
- & if so,??? any tips ?
?
Constraints:
?-- I have no Test Fixtures for this.
--? My solid samples are large: 1.25" Long x 0.5" Dia.
?
I have an LCR meter: a? GR? DigiBridge 1693 RCL meter,?
-? I can't seem to find sufficient details for measuring Dielectric ( Tangent Loss, etc. ) using the GR IET RCL 1693 on the IET Website,
?

The GR DigiBridge has a maximum frequency of 200 kHz, so you are not going to do 300 MHz to 4 GHz !!!

I have a document from NPL on my website.


That mentions about 50 different methods. Note that unless a material is pretty lossy, you are not going to be able to measure the loss with an LCR meter.

Dave


Question: Dielectric ( Loss Tangent, etc. ) measurement of a solid insulator, Ceramic, Delrin, Nylon, HDPE ...

 

?
Question:
? Has anyone used an? LCR meter? to measure Dielectric Loss for a solid insulator ?
?
( Ceramic, Delrin, Nylon, HDPE ... ) for use at frequencies between 0.3 to 4 GHz , for a particular application.
?
- & if so,??? any tips ?
?
Constraints:
?-- I have no Test Fixtures for this.
--? My solid samples are large: 1.25" Long x 0.5" Dia.
?
I have an LCR meter: a? GR? DigiBridge 1693 RCL meter,?
-? I can't seem to find sufficient details for measuring Dielectric ( Tangent Loss, etc. ) using the GR IET RCL 1693 on the IET Website,
?
thanks,
?
**
Ref's:
( IET states that Dielectric measurements can be done with their GR Capacitance Bridge:
?https://www.ietlabs.com/pdf/GR_Appnote/EID11%20Hersh,%20Dielectric%20Loss%20&%20Permitivity%20Meas.%20With%20GR%20Precision%20Cap.%20Brdgs.pdf
?
An Hp Ref. of Dielectric measurements at Rf & uW freqs., using the Hp 4194a LCR meter:
? ? http://hparchive.com/seminar_notes/a-207.pdf
?
?
Re: Looking for help troubleshooting an HP8640 sig gen

 

Wow,? So much information and guidance here.? Thank you so much.? Based on reading the files and the suggested sources I'm focused on the missing finger problem as the cause of the failure to show correct output on the display.? Once I get that sorted, I'll have a deeprt look at the divider chain to see if it's the cause of the lost 0.5 to 2 kHz ranges.
?
Now to find some time to start tinkering....
?
ron
KA3JIJ
Re: back foot of HP214B

 

¿ªÔÆÌåÓý

Yes. Unfortunately one side of the thread broke open.
there is nothing inside that should be removed.

It may be possible using some cold metal repair using
some kind of glue modeling a new side.
This then should not break off when a new thread
is tried to put inside. Does not seem to be that easy.

I do not have such an aluminium part to be able
to replace it as a whole.

Am 26.07.2024 um 11:50 schrieb Adrian Nicol via groups.io:
I'm guessing you mean the thread that holds the foot on in the instrument itself is stripped?
If so, it will be either a 6-32 UNC or an M3.5 ISO thread and there are 'Helicoil' type thread repair kits for either thread easily available.
If you mean it was damaged and the bolt that held it on was snapped off in the threaded hole then you will need to get it out somehow - bit more of a challenge, but can be done. Sometimes if it's not tight I've got them out with using a scriber point and a (very small) hammer to tap and rotate the screw counter-clockwise enough to get a pair of pliers on it, failing that careful drilling perhaps followed up with a Helicoil if things went a bit off centre will work!

On 25/07/2024 22:40, Dr. Matthias Weisser via groups.io wrote:
I am searching for a back foot of HP214B.
Any hints where to get one?
Unfortunately also the thread is broken.

Matthias
--
Dr. Matthias Weisser
Lackenschusterweg 2
82024 Taufkirchen
Tel. 089/6126977
Re: back foot of HP214B

 

¿ªÔÆÌåÓý

Hi Bernd,

thank you for your kind offer.
This part looks quite right.

As only one foot is missing I would
prefer getting an original replacement,
could also be a used one.

The foot is screwed to a aluminium part.
This is broken at the end. Too much force broke it
as it seems. I got it from ebay, the picture showing
that the part was missing already.

So I would need a repair solution here.

Matthias

Am 26.07.2024 um 08:37 schrieb Bernd Laengerich via groups.io:
Am 26.07.2024 um 01:07 schrieb Dr. Matthias Weisser via groups.io:

I do not have a 3D printer and I am
not experienced using one.

Hi Matthias,

I am located in Germany and I can print a set of those feet. Is this the right one?



It will take some days as I am currently busy, the colour will be grey.
What do you mean with the thread is broken? AFAIR the thread is in the instruments body and the feet will be attached with either M3.5 or 6-32 screws, there is no thread in the foot.

If you are interested, contact me offlist please.

Bernd

--
Dr. Matthias Weisser
Lackenschusterweg 2
82024 Taufkirchen
Tel. 089/6126977
Re: Looking for 1GG7-4210 amplifier datasheet

 

Hello,
?
I was finally able to do some first tests on this MMIC
?
The tests have been performed on a WESSEX Electronics amplifier 6003-03-009 ( 3 stages with three 1GG7-4210 )
?
The results are :
?
Vd = 5 to 8V? Current : around 600mA? with Vg = -0.05V
?
BW for "flat" gain from 1 ( may be below ) to 15.5 Ghz
?
@ 10.368 Ghz
Pin = 0dBm - Pout = +17dBm @Vd = 5V
Pin = 0dBm - Pout = +17.5dBm @Vd = 7V
Pin = 0 dBm - Pout = +18 dBm @ Vd = 8V
?
@ 5.760 Ghz
Pin = 0dBm - Pout = +18dBm @Vd = 5V
Pin = 0dBm - Pout = +18.5dBm @Vd = 7V
Pin = 0 dBm - Pout = +19 dBm @ Vd = 8V
?
So a quite large BW but low gain...
?
Best 73s
eric
?
Re: SMA (or 3.5APC) attenuators needed

 

On Sat, 27 Jul 2024 at 09:24, David Kirkby <drkirkby@...> wrote:
On Thu, 25 Jul 2024 at 03:38, Bruce via <bruce=[email protected]> wrote:
Looking for 4 of 20 or 30 dB SMA or 3.5 attenuators - anybody have anything they want to part with ???
?
Cheers!
?
Bruce

Please note the purpose of the group?


¡°The equipment?must?be from major test equipment manufacturers like Agilent, Fluke, HP, Keithley, Keysight, LeCroy, Marconi, Picosecond Pulse Labs (now Tektronix), Rohde&Schwarz, Stanford Research, Tektronix or similar.¡±

Dave (group owner).?


Oops, I see you posted to the HP/Agilent/Keysight group, not the test equipment one.?

It¡¯s still off topic?



Dave (group owner)?
Re: SMA (or 3.5APC) attenuators needed

 

On Thu, 25 Jul 2024 at 03:38, Bruce via <bruce=[email protected]> wrote:
Looking for 4 of 20 or 30 dB SMA or 3.5 attenuators - anybody have anything they want to part with ???
?
Cheers!
?
Bruce

Please note the purpose of the group?


¡°The equipment?must?be from major test equipment manufacturers like Agilent, Fluke, HP, Keithley, Keysight, LeCroy, Marconi, Picosecond Pulse Labs (now Tektronix), Rohde&Schwarz, Stanford Research, Tektronix or similar.¡±

Dave (group owner).?
Re: SMA (or 3.5APC) attenuators needed

 

Jo John and Skip - Interesting. lets take this off line:? bruce@...
?
Questions:
1) what freq range
2) What power
3) How many
4) Asking price
?
?
Cheers!
?
Bruce
?
Yes I realize some answered all but lets discuss off line.
Re: Know anyone that repairs HP3586 B/C selective receivers.

 

I have lost track of who needs what, but if it helps,
?
I have a couple of HP 3586x units that are parts mules...
?
Glad to sell bits and boards....
?
None of the power supply boards, however....
?
Dan In Chandler AZ
Re: Know anyone that repairs HP3586 B/C selective receivers.

 

If it gets to be a micro thing. Find a used HP 5004 (I think) signature analyzer. They are generally cheap. Most of the HP troubleshooting method and trees used them. It really works and is not at all hard.
It will take you down to a very small area thats the issue. Like a bad eprom etc. It really works and I have solved at least 3 major HP problems that way.
Good luck.
Now what was that error message?
Other humor I have run into is that things get odd when someone takes the oven oscillator out to sell. Just put an external 5 or 10 MHz in.?
Regards
Paul
WB8TSL
Re: Know anyone that repairs HP3586 B/C selective receivers.

 

I have a B model on the bench right now.? Had to get and repair a PS board (it was missing) and the mainboard due to NiCd issues.? Nothing too crazy about it's design.? Let us know the error; it could be as simple as the fact that the NiCd is dead.? Regardless, open it up and remove that NiCd ASAP if it hasn't been done.
Re: Know anyone that repairs HP3586 B/C selective receivers.

 

¿ªÔÆÌåÓý

Try Joe Cliene.? In Houston.? Great guy.?

JOECLINE5747@...

73/jeff/ac0c
alpha-charlie-zero-charlie
On 7/27/2024 6:16 AM, Mikek wrote:

On Fri, Jul 26, 2024 at 02:07 PM, gren wrote:
(??? sorry, can't resist ! )
?Please feel from the more then better!
Not only that, it is more motivation to get it back on the bench.
????????????????????????????????? Mikek
Re: HP 8563E - CRT turns on only after waiting for a while turned off

 

Yes
Re: Know anyone that repairs HP3586 B/C selective receivers.

 

On Fri, Jul 26, 2024 at 02:07 PM, gren wrote:
(??? sorry, can't resist ! )
?Please feel from the more then better!
Not only that, it is more motivation to get it back on the bench.
????????????????????????????????? Mikek
Re: Know anyone that repairs HP3586 B/C selective receivers.

 

?
...... &?
(??? sorry, can't resist ! )
?
Ralph: ?A Precision Reference Oscillator for the HP-3586 Selective Level Meter
?
&?
?more obscure 3586 repairs by Didier:
?
?
?
& Bruce:
that pesky power MJ3000 Darlington transistor failure:
?
?
Re: Know anyone that repairs HP3586 B/C selective receivers.

 

?
.... and,?
???? an obscure note about cutting into the 3586 Regulator board to do a repair of damaged PCB traces
????? ... due to the dreaded NiCad Battery leaks:
?
/g/HP-Agilent-Keysight-equipment/topic/72843924#msg104660
MSG ?
?
"? What a mess and unfortunately it happens.
In addition to the various cleaning hints at least with nicad batteries I have found they do leave conductive stuff. Even though the boards been cleaned. In between traces can conduct and creates all sorts of strange effects. I ran into this in a HP 3586 selective voltmeter. After figuring out the traces were conducting I used a sharp knife to remove some of the top layers in a 2 layer regulator board. That fixed it. The stuff had leaked below the top surface.
Regards
Paul. "
?
?
6081 - 6100 of 151433