Hi, everybody.
I'm looking for a?85660-20101, the piece of hardline or semi-rigid coax that connects the IF input to the IF output on the front of the synthesizer section of an 8566A spectrum analyzer.? I can't find it on eBay.
My 8566A came with a piece of semi-flexible cable, so it works, but I keep bumping it because it's right about at knee level (I keep that 112 lb monster on the bottom shelf of my bench to keep the center of gravity low).? Sure would be nice to have the real thing!? Anybody have a parts mule that could spare an?85660-20101?
I'm in Southern California, USA.
Thanks.
Jim Ford
|
Re: Opens and shorts for 4285A LCR meter owners
Hello,
do not worry. Just send another gaggle of pics, and we will run
it.
Something else: I have one of these expensive Tyco, or Tymo or
Dymo label printer. But it was never used. If anyone needs labels
printed, let me know...maybe you can motivate me to bring it up. I
would simply ram the labels in an envelope and send it your way.
Tam
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 04. 13. 3:29, Dr. David
Kirkby, Kirkby Microwave Ltd wrote:
toggle quoted message
Show quoted text
On Mon, 13 Apr 2020 at 02:01, Tam Hanna < tamhan@...>
wrote:
Hello Dave,
giving credit is life blood. I treat my Instagram as a
public rolodex, and hope that someone who needs sh*t you
sell slinks over to your firm.
If he just does it, and does not even email me, I am
even happier. I am not in it for ego...
Tam
I will create some better pictures later with
some printed labels, rather then ones I scribbled with a
pen.?
I have been thinking about how best to make a
fixture able to handle a wide range of lengths of coils ?I
was thinking of use earth blocks like these
?
Preferably not at Farnell prices!
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
|
GPSDO connected to external ref inputs
Hi, everybody.
I keep my (Leo Bodnar) GPS-disciplined oscillator running continuously, and I have its output going to a?BG7TBL distribution amp (yes, I could have designed and built my own distribution amp easily, but for <$100, it's not worth the time, since I'm not retired yet) .? So far, the only instruments I own that can use the 10 MHz from the GPSDO are an 8566A spectrum analyzer and a 5343A frequency counter.? Now the distribution amp puts out 4 Vp-p unterminated and 2 Vp-p = +10 dBm into 50 ohms, and I'm wondering if I should keep the outputs of the distrib amp running continuously into the spec an and freq counter.
Maybe I'm just extra cautious, but ISTR blowing something up early in my career by putting hot signals into something not powered up.??I keep the 8566A and 5343A powered up and in Standby mode at all times.?Perhaps we have the designers of said HP equipments in the group?? Or at least somebody familiar with the innards of one and/or the other piece of gear.? Magnificent stuff, BTW!
Thanks.
Jim Ford
|
Re: Opens and shorts for 4285A LCR meter owners
On Mon, 13 Apr 2020 at 02:01, Tam Hanna < tamhan@...> wrote:
Hello Dave,
giving credit is life blood. I treat my Instagram as a public
rolodex, and hope that someone who needs sh*t you sell slinks over
to your firm.
If he just does it, and does not even email me, I am even
happier. I am not in it for ego...
Tam I will create some better pictures later with some printed labels, rather then ones I scribbled with a pen.?
I have been thinking about how best to make a fixture able to handle a wide range of lengths of coils ?I was thinking of use earth blocks like these
?
Preferably not at Farnell prices!
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
|
Re: Opens and shorts for 4285A LCR meter owners
Hello Dave,
giving credit is life blood. I treat my Instagram as a public
rolodex, and hope that someone who needs sh*t you sell slinks over
to your firm.
If he just does it, and does not even email me, I am even
happier. I am not in it for ego...
Tam
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 04. 13. 2:59, Dr. David
Kirkby, Kirkby Microwave Ltd wrote:
toggle quoted message
Show quoted text
On Mon, 13 Apr 2020 at 01:53, Tam Hanna < tamhan@...>
wrote:
Hello David,
may I have these pictures for my Instagram?
Sure
I would give you full credit of course.
I was going to ask that anyway. But feel free
to use?
Tam
With best regards
Tam HANNA
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
|
Re: Opens and shorts for 4285A LCR meter owners
On Mon, 13 Apr 2020 at 01:53, Tam Hanna < tamhan@...> wrote:
Hello David,
may I have these pictures for my Instagram? Sure
I would give you full credit of course.
I was going to ask that anyway. But feel free to use? Tam
With best regards
Tam HANNA
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
|
Re: Opens and shorts for 4285A LCR meter owners
Hello David,
may I have these pictures for my Instagram?
I would give you full credit of course.
Tam
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 04. 13. 2:41, Dr. David
Kirkby, Kirkby Microwave Ltd wrote:
toggle quoted message
Show quoted text
If you own a 30 MHz 4285A LCR meter, you may have
discovered that you should perform a cable compensation if using
1 m or 2 m cables. You need
* Supplied 100 ohm resistor?
* 42090A open
* 42091A short?
The latter are over $1200 each. The 4285A LCR
manual tells you how cobble together the open and short using
BNC adapters if you don¡¯t have the 42090A and 42091A, but I
decided to make them up. Here¡¯s an internal view of the short.
There are two suboptimal things here, but I decided to ignore
them.
1) One should use metal boxes That would short the
braids with a lower inductance, but I had the plastic boxes and
believe that the tags on the BNC connectors which are about 3 mm
wide, are not going to present much inductance.
2) I shorted the inner conductors with a scrap of
FR4 PCB. A bit of wide copper would have been better, but again
I don¡¯t think it will matter. At the maximum frequency (30 MHz),
the wavelength is 10 m.?
The only difference between the open and short is
that the open joins the two pairs of outer BNCs, but doesn¡¯t
short all 4.?
Tomorrow I will make up some proper labels for
these.?
I also a photograph that I made some time ago to
use with a 1 MHz 4284A. It has red and black connectors for the
DUT - there¡¯s no provision for adding DC bias. That seems to
work okay with the 30 MHz 4285A. I intend making another of
these, with 100 mm spacing between the connectors, to handle
larger inductors.?
The LCR meter in the photographs in a 4284A, but
the 4285A looks identical.?
Note, that you don¡¯t need the open and short for
the 4284 - only the 4285A. I don¡¯t know what other LCR meters
these are used with. Keysight discontinued the 4285A, and do not
have a replacement.?
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
|
Opens and shorts for 4285A LCR meter owners
If you own a 30 MHz 4285A LCR meter, you may have discovered that you should perform a cable compensation if using 1 m or 2 m cables. You need
* Supplied 100 ohm resistor? * 42090A open * 42091A short? The latter are over $1200 each. The 4285A LCR manual tells you how cobble together the open and short using BNC adapters if you don¡¯t have the 42090A and 42091A, but I decided to make them up. Here¡¯s an internal view of the short. There are two suboptimal things here, but I decided to ignore them. 1) One should use metal boxes That would short the braids with a lower inductance, but I had the plastic boxes and believe that the tags on the BNC connectors which are about 3 mm wide, are not going to present much inductance.
2) I shorted the inner conductors with a scrap of FR4 PCB. A bit of wide copper would have been better, but again I don¡¯t think it will matter. At the maximum frequency (30 MHz), the wavelength is 10 m.?
The only difference between the open and short is that the open joins the two pairs of outer BNCs, but doesn¡¯t short all 4.?
Tomorrow I will make up some proper labels for these.?
I also a photograph that I made some time ago to use with a 1 MHz 4284A. It has red and black connectors for the DUT - there¡¯s no provision for adding DC bias. That seems to work okay with the 30 MHz 4285A. I intend making another of these, with 100 mm spacing between the connectors, to handle larger inductors.?
The LCR meter in the photographs in a 4284A, but the 4285A looks identical.?
Note, that you don¡¯t need the open and short for the 4284 - only the 4285A. I don¡¯t know what other LCR meters these are used with. Keysight discontinued the 4285A, and do not have a replacement.?
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
|
Hi Rick,
Thanks ! I know this one yet : very interesting indeed. I already
transfer it to my friend.
Best regards,
Fabien, F4CTZ.
Le 13/04/2020 ¨¤ 01:54, garp6 a ¨¦crit?:
toggle quoted message
Show quoted text
hi Fabien,
? ?As well as the previous Web links, look at this repair of the
HP 70004a power supply:
rick
|
hi Fabien,
? ?As well as the previous Web links, look at this repair of the HP 70004a power supply:
rick
|
Everything is located in Downtown Los Angeles, CA.??I am willing to meet people, though we need to maintain social distancing for now.?J??I have the following, all is OBO:
?
Agilent 16702B logic analyzer with 2 cards, and lots of accessories $500.00 plus shipping
?
HP 435A Power Meter.??$50.00 plus shipping
?
HP 478A power sensor with cable.??$150.00??shipped.
?
HP 10811-60160 OCXO.??Includes a board and cable.??$250.00 shipped.
?
HP 53181A keypad board with Display.??$100.00 shipped.
?
I am parting out an HP 8594E.??Let me know what you want/need, and we can discuss pricing, or, make me an offer on the entire thing.
?
Pics https://imgur.com/a/hgUVc0I
|
Re: HP 8920A spectrum analyser amplitude calibration
Hi Colin
I have also seen your posting on the HP8924 group which has additional information in it.
First it is very important to say at what frequencies you are experiencing the errors, the main reason for this is that the front panel on a HP8920A gives the operating range as 400KHz to 1GHz. This is ONLY true for the original electromechanical attenuator version, all the ones that I have seen in the UK have had the PIN diode attenuator fitted which in my experience cannot be trusted below 50MHz. HP claimed 10MHz in their dreams.
Most of these test sets were purchased in the UK for analogue cellular use so the use of a PIN diode attenuator was not an issue.
I would first check to see if the input load measures 50 ohms at the N port, if it does then check and re torque the internal hard line SMA's using a torque spanner, this is very important to avoid damage to the SMA's. There were a number of optimal power handling input loads available, it is not unknown for excess RF power to damage them.
I have not had to work on a 8920A for some years, but as I recall the calibration/adjustment was carried out via the GPIB port using dedicated HP software that would not run on anything later than Windows 95 or possibly 98.
Hope that this helps
George G6HIG On Sunday, 12 April 2020, 22:18:40 BST, Colin Smithers <colin@...> wrote:
Hi all,
I have an 8920A and the spectrum analyser amplitude level is 3dB out. I have read enough to understand that calibrating this is a bit of a secret. Does anyone know it please?
Similarly for calibrating the power meter.
I have asked the same question on the 8924-series group.
Kind regards
Colin Smithers G4CWH
|
Re: Bill West keytop puller
I used tweezers and dental picks to gently remove the springs, clean them and their seats, and reinsert with no lubricant (none needed in my opinion).
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- Original Message ----- From: "Don Bitters via groups.io" <donbitters@...>
To: [email protected]
Sent: Sunday, April 12, 2020 5:28:56 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Bill West keytop puller
My procedure on the 8566/8568 SA¡¯s (same key switches) was to to remove the
front panel, then the keyboard, then use a swab with IPA (isopropyl alcohol)
and rotate the swab on the metal spring - above and below the red plastic
bridge that hold the spring in the switch, then repeat with DeOxit. Then
exercise the switch, checking for
proper operation. This also allows you to check for missing springs,
misaligned springs, rusty springs, and dirty springs. I never had repeat
issues with these switches unless the operating environment was very dirty.
Don Bitters
|
Re: non-profit engineering
This is actually very interesting and worthy of further discussion:
toggle quoted message
Show quoted text
On Sun, Apr 12, 2020 at 01:27 PM, Tam Hanna wrote:
(Snip) Now I really worry about our profession. This is a little known fact: the Syrian government did a study of religious and political extremists. The results were shocking: I expected psychoanalysts, students of gender, philosophers and other "talk scientists" to take the lead. But it actually was electrical engineers taking the lead...
?
(snip) Tam
With best regards
?
Tam HANNA (emailing on a BlackBerry PRIV)
?
?
Enjoy electronics? Join 14k other followers by visiting the Crazy Electronics Lab at
?
?
Am 12. April 2020 19:16:30 MESZ schrieb Carsten Bormann <cabocabo@...>:
On 2020-04-12, at 14:31, Chuck Harris <cfharris@...> wrote:
So, Germany has changed to allow its people to wander
the streets wearing swastika¡¯s?
Of course not. We¡¯re not idiots.
But you don¡¯t get "in jail for 10 years" for ¡°saying something¡±.
Seriously bad actors like (*) do get in trouble, though. Don¡¯t operate like him.
I¡¯m sorry I have to bring this up again, but the kind of malicious misinformation that started this side conversation cannot stand.
Gr¨¹?e, Carsten
(*) I actually worked with the guy during one of his lucid phases, at the time when he did some work for the customer for a board/firmware design I was involved with. Incredibly brilliant guy. His renewed downturn is a sad, sad story. But of course off-topic here.
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#104847): /g/HP-Agilent-Keysight-equipment/message/104847
Mute This Topic: /mt/72936034/102401
Group Owner: [email protected]
Unsubscribe: /g/HP-Agilent-Keysight-equipment/leave/defanged [tamhan@...]
|
Re: Bill West keytop puller
There was a tweezer like tool that was made of very thin spring steel wire that was inserted between the key cap on opposite corners, and front panel, rotated 45 degrees, then pull outward to remove the key cap.
I suspect you could make a similar tool from a paper clip.
Don Bitters
|
Re: Bill West keytop puller
That's exactly what I did on my 8566B. I did have to replace a bunch of springs. The keyboard has been trouble-free ever since.
DaveD
toggle quoted message
Show quoted text
On 4/12/2020 6:28 PM, Don Bitters via groups.io wrote: My procedure on the 8566/8568 SA¡¯s (same key switches) was to to remove the front panel, then the keyboard, then use a swab with IPA (isopropyl alcohol) and rotate the swab on the metal spring - above and below the red plastic bridge that hold the spring in the switch, then repeat with DeOxit. Then exercise the switch, checking for
proper operation. This also allows you to check for missing springs, misaligned springs, rusty springs, and dirty springs. I never had repeat issues with these switches unless the operating environment was very dirty.
Don Bitters
--
This email has been checked for viruses by Avast antivirus software.
|
Re: Bill West keytop puller
My procedure on the 8566/8568 SA¡¯s (same key switches) was to to remove the front panel, then the keyboard, then use a swab with IPA (isopropyl alcohol) and rotate the swab on the metal spring - above and below the red plastic bridge that hold the spring in the switch, then repeat with DeOxit. Then exercise the switch, checking for
proper operation. This also allows you to check for missing springs, misaligned springs, rusty springs, and dirty springs. I never had repeat issues with these switches unless the operating environment was very dirty.
Don Bitters
|
Re: non-profit engineering
yes it is there but can anybody tell us which part of this thread is even remotely related to HP/Agilent equipment? so instead of looking at the bottom of your email, i suggest you look at the title/subject line of your email and it says? [email protected]?
On Sun, Apr 12, 2020 at 06:00 PM, Lou Blasco wrote:
For those of you that have had enough, look at the bottom of your email. There's a link that says "Mute This Topic". Click the link and follow the instructions.?
?
This hen-party should go offline.
?
?
================================================================================
On 4/12/2020 12:27 PM, Tam Hanna wrote:
Hello,
Sorry to take this even more off topic: Mahler is an electrical engineer??? I mean, OK, he bedded a woman 25 years his younger, which is quite common with engineers who pick up Game as a side hustle.
Now I really worry about our profession. This is a little known fact: the Syrian government did a study of religious and political extremists. The results were shocking: I expected psychoanalysts, students of gender, philosophers and other "talk scientists" to take the lead. But it actually was electrical engineers taking the lead...
And nope, I am too much of an Alcoholic to even consider Islamism. I would fight FOR beer, not against it.
Tam
With best regards
Tam HANNA (emailing on a BlackBerry PRIV)
Enjoy electronics? Join 14k other followers by visiting the Crazy Electronics Lab at
Am 12. April 2020 19:16:30 MESZ schrieb Carsten Bormann <cabocabo@...>:
On 2020-04-12, at 14:31, Chuck Harris <cfharris@...> wrote:
So, Germany has changed to allow its people to wander the streets wearing swastika¡¯s?
Of course not. We¡¯re not idiots.
But you don¡¯t get "in jail for 10 years" for ¡°saying something¡±.
Seriously bad actors like (*) do get in trouble, though. Don¡¯t operate like him.
I¡¯m sorry I have to bring this up again, but the kind of malicious misinformation that started this side conversation cannot stand.
Gr¨¹?e, Carsten
(*) I actually worked with the guy during one of his lucid phases, at the time when he did some work for the customer for a board/firmware design I was involved with. Incredibly brilliant guy. His renewed downturn is a sad, sad story. But of course off-topic here.
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#104847): /g/HP-Agilent-Keysight-equipment/message/104847
Mute This Topic: /mt/72936034/102401
Group Owner: [email protected]
Unsubscribe: /g/HP-Agilent-Keysight-equipment/leave/defanged [tamhan@...]
?
?
|
I'm happy to report that I was able to disassemble the noisy pot, clean out the carbon dust, put a couple of drops of DeoxiT on the moving parts (wish I had FaderLub but...) and reassembled it. It works so well now! Glad I decided to do that.
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- Original Message ----- From: "Barry" <n4buq@...>
To: [email protected]
Sent: Friday, April 10, 2020 2:22:53 PM
Subject: Re: [HP-Agilent-Keysight-equipment] HP 334A Balance Pots
I may try prying them open as well so as to be a bit more careful about how
I'm cleaning things in there.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Richard Knoppow" <dickburk@...>
To: [email protected]
Sent: Friday, April 10, 2020 1:45:25 PM
Subject: Re: [HP-Agilent-Keysight-equipment] HP 334A Balance Pots
?? I have had some luck by prying the covers off for cleaning
and then crimping the tabs back. Can't be done where the pots are
stacked. AB were the best of the bunch are a pain to clean.
Ohmite sold these same pots under their own name. Same for fixed
composition resistors, Ohmite and AB are actually all AB. Ohmite
actually says this in some of its early advertising. I have no
idea what the story behind this was.
On 4/10/2020 11:30 AM, ebrucehunter via groups.io wrote:
Barry,
I have one of these instruments, but it is too buried to easily
allow inspection to determine what type of pots were used.
If the values are above 1k, they are probably not wire-wound.
If they happen to be Allen-Bradley (AB) pots, an age old remedy
is to take a 1/16-inch drill bit and drill a hole in the cover
- in the outer crevice - at the bottom of the pot away from the
terminals.? The snout of a can of contact cleaner can then be
inserted in the drilled hole to blast the interior of the pot.
This cleaning will typically last for two or three years and
then you might have to do it again.? The access hole remains
available.? In drilling the hole, metal chips seem to be pulled
outward and are unlikely to enter the pot.? But be careful so
that when the drill bit breaks through, that it does not enter
and damage the pot.
Often these pots can be cleaned by pulling outward on the shaft
-- it will move about 1/16-inch -- while quickly turning the
knob from end to end.
Bruce, KG6OJI
--
Richard Knoppow
dickburk@...
WB6KBL
|
Re: non-profit engineering
For those of you that have had enough, look at the bottom of your email. There's a link that says "Mute This Topic". Click the link and follow the instructions.?
This hen-party should go offline.
================================================================================
On 4/12/2020 12:27 PM, Tam Hanna wrote:
Hello,
Sorry to take this even more off topic: Mahler is an electrical
engineer??? I mean, OK, he bedded a woman 25 years his younger,
which is quite common with engineers who pick up Game as a side
hustle.
Now I really worry about our profession. This is a little known
fact: the Syrian government did a study of religious and political
extremists. The results were shocking: I expected psychoanalysts,
students of gender, philosophers and other "talk scientists" to
take the lead. But it actually was electrical engineers taking the
lead...
And nope, I am too much of an Alcoholic to even consider Islamism.
I would fight FOR beer, not against it.
Tam
With best regards
Tam HANNA (emailing on a BlackBerry PRIV)
Enjoy electronics? Join 14k other followers by visiting the Crazy
Electronics Lab at
Am 12. April 2020 19:16:30 MESZ schrieb
Carsten Bormann <cabocabo@...>:
On 2020-04-12, at 14:31, Chuck Harris <cfharris@...> wrote:
So, Germany has changed to allow its people to wander
the streets wearing swastika¡¯s?
Of course not. We¡¯re not idiots.
But you don¡¯t get "in jail for 10 years" for ¡°saying something¡±.
Seriously bad actors like (*) do get in trouble, though. Don¡¯t operate like him.
I¡¯m sorry I have to bring this up again, but the kind of malicious misinformation that started this side conversation cannot stand.
Gr¨¹?e, Carsten
(*) I actually worked with the guy during one of his lucid phases, at the time when he did some work for the customer for a board/firmware design I was involved with. Incredibly brilliant guy. His renewed downturn is a sad, sad story. But of course off-topic here.
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#104847): /g/HP-Agilent-Keysight-equipment/message/104847
Mute This Topic: /mt/72936034/102401
Group Owner: [email protected]
Unsubscribe: /g/HP-Agilent-Keysight-equipment/leave/defanged [tamhan@...]
|
Dr. David Kirkby, Kirkby Microwave Ltd
RFI-EMI-GUY