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Date
Re: Anybody got a good LCR meter that they want to sell?

Dr. David Kirkby (Kirkby Microwave Ltd)
 

On 15 July 2017 at 16:37, Bob Albert bob91343@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:


That is a good unit for not too demanding applications.? However, it's available on ebay for a lot less money.? In some cases, less than $10 shipped.

I have a similar one and use it a lot.

Bob

Are you saying that the Hungarian $55 one can be had on eBay for $10? I don't think so. The Hungarian one seems to be well thought out in design, whereas none of the other cheap one seem to be.

The Hungarian one use 4-wire sending, which few on eBay do unless you pay lots of money.

Dave

Re: 141T reference replacement..a cure??

 

A number of my antiques use neon bulbs as voltage references; it seems to be common in HP (and other?) instruments of that era. I too have read about (and experienced) SA plug-in fuses blowing because of an aged neon that did not strike at the proper voltage (so it was said). From my manuals I have the following:

143A Oscilloscope (large CRT, otherwise same as 140A): the +100V supply uses a neon rated in the schematic and parts list at "82.0V +/- 1.0V" (part #1940-0013). No "NE-number" is provided in parts list or schematic.

132A Dual Beam Osilloscope uses an NE86 in the control amplifier of the high-voltage power supply's regulator circuitry. The oscilloscope circuitry itself is full of NE2's (2140-0084) and NE86's (2140-0055). No voltage rating is provided in the manual.?

175A Oscilloscope uses NE-2's (2140-0008) throughout the circuitry. Most of them are placed between the grids and cathodes of vacuum tubes used as amplifiers and (especially) cathode followers. The low-voltage power supply uses no neons but rather a 5651 (vacuum tube-shaped) gas-discharge tube rated at 87 volts. Similar in operation to a neon, I suppose, but larger, easier to replace, perhaps longer-lasting and more reliable, and certainly more expensive.

Interesting that HP uses NE-2's under two different part numbers (2140-0008 and 0084). My manuals do not provide solid data on the strike or operating voltages of these neons. None are explicitly marked as "selected" or "special."?

Jeremy



On Sat, Jul 15, 2017 at 1:44 PM Chuck Harris cfharris@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

?

Ok, good question.

This thread is nominally about the voltage reference in
the 141T, older models, that was a gas regulator tube,
that looked like an oversized NE2.

It has been a very long time since I abandoned the 141T
series as being useful, but I recall the problematic gas
reference tube that looks like a large NE2. Others that
I respect have informed during this thread that they are
89V.

Do you know differently?

Since 87V is neither the 67V nor the 89V that I mentioned,
you could be talking about the NE2's ionization voltage,
I am not sure...

That is even older information I got from my dad, back
when I was a teenager, some nearly 50 years ago. I have
seen 90V strike, and 67V ionization as the nominal values
for the NE2 many times over the years. But I never would
use one as a reference, so its exact value is unimportant
to me.

-Chuck Harris



ken chalfant kpchalfant@... [hp_agilent_equipment] wrote:
> Hi Chuck,
>
> Without any disrespect or challenge intended¡­
>
> How, sir, do you know these ionize around 87 volts?
>
> Thank you.
>
> Regards,
>
> Ken
>
>
> On 15Jul, 2017, at 7:20 AM, Chuck Harris cfharris@...cfharris@...> [hp_agilent_equipment] <hp_agilent_equipment@...hp_agilent_equipment@...>> wrote:
>
>
> They aren't NE2's. NE2's run at about 67V, these run at about 89V.
>
> -Chuck Harris
>
> Scott McGrath scott@...scott@...> [hp_agilent_equipment] wrote:
>> Just visit Amazon 10 NE-2's for 8 bucks problem solved
>>
>>

--
4.
Re: 141T reference replacement..a cure??

Bob Goodrich
 

My 141T has a Z82R7? reference tube in it.? As of 8/21/14 the voltage across the VR tube was measured at 83.6 instead of 82.7 V.
I had to shunt R26? 22.1K with 220K in order to? in order to be able to adjust the +100 Volt supply to 100V. Still working today.


The link below to Radio-Electronics magazine May 1965 has a brief reference to the Signalite 82R7 VR tube.?
See page 65





Bob


On Saturday, July 15, 2017 1:44 PM, "Chuck Harris cfharris@... [hp_agilent_equipment]" wrote:


?
Ok, good question.

This thread is nominally about the voltage reference in
the 141T, older models, that was a gas regulator tube,
that looked like an oversized NE2.

It has been a very long time since I abandoned the 141T
series as being useful, but I recall the problematic gas
reference tube that looks like a large NE2. Others that
I respect have informed during this thread that they are
89V.

Do you know differently?

Since 87V is neither the 67V nor the 89V that I mentioned,
you could be talking about the NE2's ionization voltage,
I am not sure...

That is even older information I got from my dad, back
when I was a teenager, some nearly 50 years ago. I have
seen 90V strike, and 67V ionization as the nominal values
for the NE2 many times over the years. But I never would
use one as a reference, so its exact value is unimportant
to me.

-Chuck Harris

ken chalfant kpchalfant@... [hp_agilent_equipment] wrote:
> Hi Chuck,
>
> Without any disrespect or challenge intended¡­
>
> How, sir, do you know these ionize around 87 volts?
>
> Thank you.
>
> Regards,
>
> Ken
>
>
> On 15Jul, 2017, at 7:20 AM, Chuck Harris cfharris@...<mailto:cfharris@...> [hp_agilent_equipment] > wrote:
>
>
> They aren't NE2's. NE2's run at about 67V, these run at about 89V.
>
> -Chuck Harris
>
> Scott McGrath scott@... [hp_agilent_equipment] wrote:
>> Just visit Amazon 10 NE-2's for 8 bucks problem solved
>>
>> https://www.amazon.com/A3C-NE2-U-Bulbs-105-125-Terminals/dp/B00ZSPLRVS
Re: HP 8566B / 8568B bus interconnect cable

 

Donald,
Have you opened the connectors and inspected the connections on the 60220 cable?? From my experience this cable should also work with you 8566B.

-rastro


On Saturday, July 15, 2017 9:54 AM, "donald_s_58103@... [hp_agilent_equipment]" wrote:


?
The check instrument I ?red LED stays on after power-up and the display stays blank. After swapping the cables from one instrument to the other, I have found that the 60220 only works with my 8568B and not the 8566B and the 60094 only works with my 8566B and not the 8568B. WEIRD! (I am using the same IF/Display unit for both instruments).
Re: 141T reference replacement..a cure??

 

Ok, good question.

This thread is nominally about the voltage reference in
the 141T, older models, that was a gas regulator tube,
that looked like an oversized NE2.

It has been a very long time since I abandoned the 141T
series as being useful, but I recall the problematic gas
reference tube that looks like a large NE2. Others that
I respect have informed during this thread that they are
89V.

Do you know differently?

Since 87V is neither the 67V nor the 89V that I mentioned,
you could be talking about the NE2's ionization voltage,
I am not sure...

That is even older information I got from my dad, back
when I was a teenager, some nearly 50 years ago. I have
seen 90V strike, and 67V ionization as the nominal values
for the NE2 many times over the years. But I never would
use one as a reference, so its exact value is unimportant
to me.

-Chuck Harris

ken chalfant kpchalfant@... [hp_agilent_equipment] wrote:

Hi Chuck,

Without any disrespect or challenge intended¡­

How, sir, do you know these ionize around 87 volts?

Thank you.

Regards,

Ken


On 15Jul, 2017, at 7:20 AM, Chuck Harris cfharris@...<mailto:cfharris@...> [hp_agilent_equipment] <hp_agilent_equipment@...<mailto:hp_agilent_equipment@...>> wrote:


They aren't NE2's. NE2's run at about 67V, these run at about 89V.

-Chuck Harris

Scott McGrath scott@...<mailto:scott@...> [hp_agilent_equipment] wrote:
Just visit Amazon 10 NE-2's for 8 bucks problem solved
Re: ifr 2390 analyser

Bob Ocallaghan
 

hi cliff second mail..10 ghz info......today have had over 50 mails for yahoo groups,,,,none to do with my request..so will mail them again tomorrow,,,
to stop.....

right 10 ghz ...GB3FY..located at farmer parrs? fleetwood,,,not got the locator handy......its out put? is 10.240ghz...tx input ..10.425.ghz ..........
test card shows gb3fy,,,and amiddle signal bar,,,with id numbers underneath,,,when signal strenght improves....if a carier,,no video is sent......
a red bar goes accross screen,,,,also denotes strenght,,,,if a signal tx,,10.425 is sent with video on..the bar will indicate strenght,,,in green......
and nunber under the strenght......every 10 mins the ident signal changes for test card id,,to colour information..and sound channel info..for talk back...unfortunatly i think the tx and rx mast is too low,,as i have two hill in front of me ,,bourne hill ..then the golf links on fleetwood road,,,
then the hill at warbreck..so a blockage south...!!!!!fartest we have seen is I.O.M. at 2000 ft,,up..and wales 1000 ft up..p3 to p4 pics,,audio.....
difficult over distance,,,also a new? repeater is on air,,at warbreck hill...1.3ghz? at mo..1249 actuall..digital and analogue?? not on at all times,,,
call sign,,,GB3FT......IF BOTH ARE?? QRZ on net info will come up..gb3ft need dtmf codes,,,which are avail to atv guys,,via tim,,,at freckleton,,
or steve at warbreck...cant give much more info....we have probs receiving welsh and signals south of here,,cannot get gb3ud,,,at mow cop...
in cheshire,,above 1000 ft we can usually get,,,!!!so manchest er may be a prob..unless high up...ok on twt.s..wow..i get severheadaches with 10
mw..at 10 ghz,,so leaving off 10 at mo...hope inf o help full...will let you know how i go on.....many thanks,,,your friend ,,can have my e mail add
if he ned s any questions answered,,,,,,,byeeee40 watts into a 32 db ...10 ghz dish,,,wow...4kw out erp....!!!!!guessing.....but will kep away.

bob.ocall


From: "Cliff Barber g4bgp@... [hp_agilent_equipment]"
To: "hp_agilent_equipment@..."
Sent: Tuesday, 11 July 2017, 11:49
Subject: Re: [hp_agilent_equipment] ifr 2390 analyser

?
Hello Bob,
Please call me on either landline or mobile. Tnx
Cliff G4BGP


On Tue, 11 Jul 2017 at 10:57, Bob Ocallaghan bob.g1epl@... [hp_agilent_equipment]
wrote:
?
hi am looking for software to operate a marconi ifr spec anl..model 2390...and info on applying to analyser,or where i can get? installed..many thanks bob..uk.

Virus-free.


Re: Anybody got a good LCR meter that they want to sell?

Dan W8KMX
 

Take a look here. I have had good luck with a couple of
their testers. I bought this one but I bought it assembled
but could not find that here. It is accurate and cheap etc.




itance-ESR-Resistor-Mosfet-M168-p-953264.html?rmmds=search



Good luck.

Dan, W8KMX
Re: HP 8566B / 8568B bus interconnect cable

 

Verify your internal cable connections and contacts on both the cable end connectors and your instrument connectors. Over the years things take only so much abuse. I have had several units with both cable and connector problems. Your cables should work on either unit unless someone boogered them up for some reason.

Dennis



--------------------------------------------

On Sat, 7/15/17, donald_s_58103@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

Subject: [hp_agilent_equipment] Re: HP 8566B / 8568B bus interconnect cable
To: hp_agilent_equipment@...
Date: Saturday, July 15, 2017, 10:54 AM


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The check instrument I ?red LED stays on after power-up and
the display stays blank. After swapping the cables from one
instrument to the other, I have found that the 60220 only
works with my 8568B and not the 8566B and the 60094 only
works with my 8566B and not the 8568B. WEIRD! (I am using
the same IF/Display unit for both instruments).
Re: Anybody got a good LCR meter that they want to sell?

Bob Albert
 

That is a good unit for not too demanding applications.? However, it's available on ebay for a lot less money.? In some cases, less than $10 shipped.

I have a similar one and use it a lot.

Bob


On Saturday, July 15, 2017 8:06 AM, "ssc ssc@... [hp_agilent_equipment]" wrote:




There might be on here?

Mitch

On 2017-07-14 23:46, 'Dr. David Kirkby (Kirkby Microwave Ltd)' drkirkby@... [hp_agilent_equipment] wrote:
?
On 15 Jul 2017 04:56, "dan-meeks@... [hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:
>
> Asking for a friend. Wait, not really. A friend did ask but if there is a good HP out there I may buy it and try to sell him my Leader meter.
>
> If anyone has a good LCR meter that they'd consider selling, even if it may need some TLC, please reply off-list.
>
> Thanks in advance -
>
> Dan
You really need to decide what frequency range you want.
If looking at HP, you might want to consider 'impedance analysers' too.? HP seems in have this convention that impedance analysers can sweep a frequency range,? whereas LCR meters work at discrete frequencies.?
My 4284A precision LCR meter measures at more than 8000 discreet frequencies from 20 Hz to 1 MHz. But the frequencies were either chosen by a disgruntled employee or mentality retarded intern!
Thrre is 20 Hz, and another around 20.01 Hz, but nothing between 750 kHz and 1 MHz. At low frequencies the steps are ridiculously close together,? whereas at high frequencies they are really widely spaced.?
One of the problems with HP LCR meters is the fixtures cost a fortune.? I decided to buy a new 16047A axial/radial fixture from Keysight, as the cost was lower than incomplete used ones on eBay!
There's someone in Hungary selling a low cost ($50 or so) LCR meter that uses an autobalancing bridge and 4-wire Kelvin connections. This is very similar to the HP/Agilent/Keysight meters. Unlike other low cost meters, it doesn't have a switch to select L, C or R, but measures the true impedance.? I will find a link to the website if you want it. If it was not for the fact that I have the 4284A, I would buy one.
Dr David Kirkby
Managing Director
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom
Registered in England and Wales as company number 08914892

Tel 01621'680100 / +44 1621-680100






Virus-free.

Re: Anybody got a good LCR meter that they want to sell?

ssc
 

¿ªÔÆÌåÓý

There might be on here?


Mitch

On 2017-07-14 23:46, 'Dr. David Kirkby (Kirkby Microwave Ltd)' drkirkby@... [hp_agilent_equipment] wrote:

?

On 15 Jul 2017 04:56, "dan-meeks@... [hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:
>
> Asking for a friend. Wait, not really. A friend did ask but if there is a good HP out there I may buy it and try to sell him my Leader meter.
>
> If anyone has a good LCR meter that they'd consider selling, even if it may need some TLC, please reply off-list.
>
> Thanks in advance -
>
> Dan

You really need to decide what frequency range you want.

If looking at HP, you might want to consider 'impedance analysers' too.? HP seems in have this convention that impedance analysers can sweep a frequency range,? whereas LCR meters work at discrete frequencies.?

My 4284A precision LCR meter measures at more than 8000 discreet frequencies from 20 Hz to 1 MHz. But the frequencies were either chosen by a disgruntled employee or mentality retarded intern!

Thrre is 20 Hz, and another around 20.01 Hz, but nothing between 750 kHz and 1 MHz. At low frequencies the steps are ridiculously close together,? whereas at high frequencies they are really widely spaced.?

One of the problems with HP LCR meters is the fixtures cost a fortune.? I decided to buy a new 16047A axial/radial fixture from Keysight, as the cost was lower than incomplete used ones on eBay!

There's someone in Hungary selling a low cost ($50 or so) LCR meter that uses an autobalancing bridge and 4-wire Kelvin connections. This is very similar to the HP/Agilent/Keysight meters. Unlike other low cost meters, it doesn't have a switch to select L, C or R, but measures the true impedance.? I will find a link to the website if you want it. If it was not for the fact that I have the 4284A, I would buy one.

Dr David Kirkby
Managing Director
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom
Registered in England and Wales as company number 08914892

Tel 01621'680100 / +44 1621-680100


Re: HP 8566B / 8568B bus interconnect cable

 

The check instrument I ?red LED stays on after power-up and the display stays blank. After swapping the cables from one instrument to the other, I have found that the 60220 only works with my 8568B and not the 8566B and the 60094 only works with my 8566B and not the 8568B. WEIRD! (I am using the same IF/Display unit for both instruments).
Re: 141T reference replacement..a cure??

 

¿ªÔÆÌåÓý

Hi Chuck,

Without any disrespect or challenge intended¡­

How, sir, do you know these ionize around 87 volts?

Thank you.

Regards,

Ken


On 15Jul, 2017, at 7:20 AM, Chuck Harris cfharris@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

They aren't NE2's. NE2's run at about 67V, these run at about 89V.

-Chuck Harris

Scott McGrath?scott@...?[hp_agilent_equipment] wrote:
> Just visit Amazon 10 NE-2's for 8 bucks problem solved
>?
>?
>?
>?
>?
Re: 141T reference replacement..a cure??

 

They aren't NE2's. NE2's run at about 67V, these run at about 89V.

-Chuck Harris

Scott McGrath scott@... [hp_agilent_equipment] wrote:

Just visit Amazon 10 NE-2's for 8 bucks problem solved
Re: Replace Neon NE-2 with Zener in 141T PSU?

 

There are two phenomena going on here.

The reason that there is a radioisotope inserted
into "neon" references, is the neon strikes at
a different voltage when exposed to light, vs dark.

This is an always thing.

The second thing that happens is the neon gas
gets buried into the glass envelop by the
sputtered electrode material trapping it against
the glass envelope. Sputtering changes the
composition, and pressure, of the gas mixture,
which changes the overall characteristics of
the tube.

So, if you have a neon voltage *reference*, it will
always have some radioactive material sintered into
the electrodes to prevent light/dark strike voltage
differences.

If the neon reference has changed its gas composition
too much to strike, for whatever reason, it will have
the wrong voltage reference value too... regardless
of what you do to make it strike.

As to whether adding light of this or that energy
will cause the neon reference to strike over, that
it happens at all is the result of the photoelectric
effect, where stray electrons are created by the
glass envelope, and the electrodes, when the photons
strike. Ultimately, it is the electrons that reduce
the strike-over voltage (see Paschen's law for
more info).

-Chuck Harris

David Wise david_wise@... [hp_agilent_equipment] wrote:

Would you guys slow down long enough for me to type a reply? :)


Tom, Dave,


I wish. But the glass stops beta. The Kr-85 worked because it was inside.


Bob, Elliott,


So many parts in series... sometimes brute force is the best solution, but this
one puts me off. That's just my personal taste; if you want to do it, knock
yourself out.


Elliott,


HP used 1% metal film resistors. The pot is a weak point for long-term stability,
but I think that since it's in a voltage divider the high-leg tempco compensates
the low-leg tempco.


In a related thread, Alan Melia suggests adding a LED to illuminate the gas tube.
If the problem was dark effect, brought on by Kr-85 depletion, that should work
around it just dandy. I hope someone tries it. I can't, my ZZ1000 is still
working. If I can find a flickering neon at home, I'll try to figure out what
wavelength LED is the most effective. It will be visible light, not UV, the glass
blocks UV, same as external nuclear radiation.


Dave Wise?


________________________________ From: hp_agilent_equipment@...
<hp_agilent_equipment@...> on behalf of Tom Gardner tggzzz@...
[hp_agilent_equipment] <hp_agilent_equipment@...> Sent: Friday, July
14, 2017 2:18 PM To: hp_agilent_equipment@... Subject: Re:
[hp_agilent_equipment] Re: Replace Neon NE-2 with Zener in 141T PSU?



Or to a supermarket and find the "LoSalt". Replacing part of the NaCl with KCl
inevitably includes K40 :)



On 14/07/17 22:15, Artek Manuals
manuals@...<mailto:manuals@...> [hp_agilent_equipment]
wrote:


Go down to one of those 2nd hand store with your geiger counter and find a very
old $5 watch with the glow in the dark radium painted hands and dial. Peel of the
minute hand and shrink tube it to the NE-2 :-)


Dave manuals@...<mailto:manuals@...>



On 7/14/2017 5:06 PM, 'Alan Melia'
Alan.Melia@...<mailto:Alan.Melia@...> [hp_agilent_equipment]
wrote:


?

The thing is that most "zeners" do not depend on the Zener effect. That only
occurs around voltages up to around 4volts, above 5v the process is Avalanche
Breakdown , a bit like a gas tube. Then the temperature coefficient of these two
processes have opposite senses so if you combine a true Zener with a forward diode
or an avalanche diode you can minimise the tempco. The lowest tempcos are usually
around 5 to 6v."zeners".

Alan G3NYK ----- Original Message ----- From: Bob Albert bob91343@...
[hp_agilent_equipment]<mailto:bob91343@...%20[hp_agilent_equipment]> To:
hp_agilent_equipment@...<mailto:hp_agilent_equipment@...>
Sent: Friday, July 14, 2017 9:16 PM Subject: Re: [hp_agilent_equipment] Re:
Replace Neon NE-2 with Zener in 141T PSU?

Actually I think the lowest temperature coefficient is around 5V for zener diodes.
The 6.2 V units are very stable also so you don't need as many of those.

When you put zeners in series you invoke the concern of impedance. Low voltage
zeners have a fairly high impedance compared to just a few higher voltage ones.
So if the current through it changes, so will the voltage.

There are more elegant solutions to this 'problem' but the whole thread is
probably more trouble than it's worth.

Let us know your re sults.

Bob


On Friday, July 14, 2017 1:00 PM, "w7qed@...
[hp_agilent_equipment]"<mailto:w7qed@...[hp_agilent_equipment]>
<hp_agilent_equipment@...><mailto:hp_agilent_equipment@...>
wrote:




Hi Dave,

In theory, ~18x 4.5v zeners would provide the lowest drift reference for a
pure-zener design.

However, a single 82v zener has a tempo of around 0.073%. Compared to the 0.004%
of the original reference bulb this is pathetic, however, looking at the dozens of
carbon resistors, dried out caps, and of course the potentiometer that sets the
gain (and remember, new pots are generally not better than 100 PPM unless they are
very expensive), I think the drift and tempo from a single zener will be the least
of this circuit's problems!

Thanks all for your input!

--E W6EL







-- Dave Manuals@...<mailto:Manuals@...>
www.ArtekManuals.com<>

[https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif]<>
Virus-free.
www.avast.com<>
Re: 141T reference replacement..a cure??

 

¿ªÔÆÌåÓý

Just visit Amazon 10 NE-2's for 8 bucks problem solved
Re: Anybody got a good LCR meter that they want to sell?

Dr. David Kirkby - Kirkby Microwave Ltd
 

On 07/15/17 09:57 AM, Paul Nickalls paulnick@... [hp_agilent_equipment] wrote:
Maybe this will help.



"The price for one assembled and calibrated Hutale LCR-DDS-F 4.2 meter with a
tested LCD display, plus a 4-wire silicon insulated measuring cables built with
high quality Kelvin clips is 55 USD + 8 USD registered air mail cost = total 63
USD.

I accept Paypal (address: hutale@... <mailto:hutale@...>)."

I haven't purchased one yet.

Best regards, dr. Le Hung


Regards
Paul G8AQA
That's the one I meant. After some discussions I had with the author, I concluded seems pretty switched on about these.

It is somewhat different in operation to the HP 4284A, in that the 4284A uses shielded wires, and the shields are not all tied together. There's lot of different ways of connecting the shields, depending on the DUT.


If you do buy one, I would suggest you stick it in a box with 4 BNC females spaced 22 mm apart. Then it will take the HP fixtures, which if you are lucky sometimes come up cheap, but generally cost a fortune.


--
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK.
Registered in England and Wales, company number 08914892.

Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please)
Re: Anybody got a good LCR meter that they want to sell?

 

¿ªÔÆÌåÓý

Maybe this will help.


"The price for one assembled and calibrated Hutale LCR-DDS-F 4.2 meter with a tested LCD display, plus a 4-wire silicon insulated measuring cables built with high quality Kelvin clips is 55 USD + 8 USD registered air mail cost = total 63 USD.

I accept Paypal (address: hutale@...)."

I haven't purchased one yet.

Best regards, dr. Le Hung


Regards
Paul G8AQA

On 15/07/2017 06:46, 'Dr. David Kirkby (Kirkby Microwave Ltd)' drkirkby@... [hp_agilent_equipment] wrote:
?

On 15 Jul 2017 04:56, "dan-meeks@... [hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:
>
> Asking for a friend. Wait, not really. A friend did ask but if there is a good HP out there I may buy it and try to sell him my Leader meter.
>
> If anyone has a good LCR meter that they'd consider selling, even if it may need some TLC, please reply off-list.
>
> Thanks in advance -
>
> Dan

You really need to decide what frequency range you want.

If looking at HP, you might want to consider 'impedance analysers' too.? HP seems in have this convention that impedance analysers can sweep a frequency range,? whereas LCR meters work at discrete frequencies.?

My 4284A precision LCR meter measures at more than 8000 discreet frequencies from 20 Hz to 1 MHz. But the frequencies were either chosen by a disgruntled employee or mentality retarded intern!

Thrre is 20 Hz, and another around 20.01 Hz, but nothing between 750 kHz and 1 MHz. At low frequencies the steps are ridiculously close together,? whereas at high frequencies they are really widely spaced.?

One of the problems with HP LCR meters is the fixtures cost a fortune.? I decided to buy a new 16047A axial/radial fixture from Keysight, as the cost was lower than incomplete used ones on eBay!

There's someone in Hungary selling a low cost ($50 or so) LCR meter that uses an autobalancing bridge and 4-wire Kelvin connections This is very similar to the HP/Agilent/Keysight meters. Unlike other low cost meters, it doesn't have a switch to select L, C or R, but measures the true impedance.? I will find a link to the website if you want it If it was not for the fact that I have the 4284A, I would buy one.

Dr David Kirkby
Managing Director
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom
Registered in England and Wales as company number 08914892

Tel 01621'680100 / +44 1621-680100



Virus-free.

Re: USB Power Probe Calibration software

[email protected]
 

Thanks lothar for the reply.

The U8485A opt 200 sensor seems to be working very well. I think the U2001H sensor is working OK too. At least it agrees with the U8485A to <0.2 dB at 50 MHz, from +10 to -35 dBm, the 8485A's lower spec limit. At 1 GHz, it agrees similarly. I have not had a chance to test other areas yet. A E4421B is my signal source into a Weinschel 1579 precision (arm balance <.01 dB) power divider with my 2 power sensors on the output arms.

I am not familiar with?DIAG:SENS:EEPROM ? X. What is the program or method that is used to send this to the sensor?
Re: Anybody got a good LCR meter that they want to sell?

Dr. David Kirkby (Kirkby Microwave Ltd)
 

On 15 Jul 2017 04:56, "dan-meeks@... [hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:
>
> Asking for a friend. Wait, not really. A friend did ask but if there is a good HP out there I may buy it and try to sell him my Leader meter.
>
> If anyone has a good LCR meter that they'd consider selling, even if it may need some TLC, please reply off-list.
>
> Thanks in advance -
>
> Dan

You really need to decide what frequency range you want.

If looking at HP, you might want to consider 'impedance analysers' too.? HP seems in have this convention that impedance analysers can sweep a frequency range,? whereas LCR meters work at discrete frequencies.?

My 4284A precision LCR meter measures at more than 8000 discreet frequencies from 20 Hz to 1 MHz. But the frequencies were either chosen by a disgruntled employee or mentality retarded intern!

Thrre is 20 Hz, and another around 20.01 Hz, but nothing between 750 kHz and 1 MHz. At low frequencies the steps are ridiculously close together,? whereas at high frequencies they are really widely spaced.?

One of the problems with HP LCR meters is the fixtures cost a fortune.? I decided to buy a new 16047A axial/radial fixture from Keysight, as the cost was lower than incomplete used ones on eBay!

There's someone in Hungary selling a low cost ($50 or so) LCR meter that uses an autobalancing bridge and 4-wire Kelvin connections. This is very similar to the HP/Agilent/Keysight meters. Unlike other low cost meters, it doesn't have a switch to select L, C or R, but measures the true impedance.? I will find a link to the website if you want it. If it was not for the fact that I have the 4284A, I would buy one.

Dr David Kirkby
Managing Director
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom
Registered in England and Wales as company number 08914892

Tel 01621'680100 / +44 1621-680100

Anybody got a good LCR meter that they want to sell?

 

Asking for a friend. Wait, not really. A friend did ask but if there is a good HP out there I may buy it and try to sell him my Leader meter.

If anyone has a good LCR meter that they'd consider selling, even if it may need some TLC, please reply off-list.

Thanks in advance -

Dan
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