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Date
Experience with AliExpress for connectors

 

I want to buy two Lemo connectors FGJ.2B.306.CLLD72Z

Problem is that Lemo want GBP19.24 each plus tax at 20% and have an MOV of
GBP100 plus tax (or a surcharge of GBP25 plus tax) with shipping on top.

I saw this page on AliExpress:

<
4-16-18/32802964953.html?spm=2114.search0104.8.60.UYHEap>

Offering them at a lower price than Lemo and seemingly offering small orders
and free shipping.

Are they OK to deal with or would I be throwing my money down a black hole?

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

 

I found a power strip with a flickering indicator.? When I shone a LED flashlight on it, it went steady.? I don't have a photometer, so it's all "by guess by golly", but I think that phosphor-type white is more effective than tri-band.? I will search my junkbox for an orange one.? Any other suggestions?
HP 5347A frequency counter input level question

 

I have just acquired an HP 5347A frequency counter. A quick run-through appears to show that the instrument is working and displays frequencies correctly on both input 1 and input 2. Input 1 (the high-frequency input, 500 MHz to 22 GHz) has an input power level of +7 dBm Max. However, on my unit, I get the "Overload" message if I exceed about -10 or -11 dBm. Is this normal? I thought I could input up to +7 dBm without overloading the input?
Re: On buying gear. A happy story.

 

I bought, for a token bid, a Gigatronics power meter on ebay from a test equipment vendor.
It was listed as will not power up.
Received it in good condition and placed it on the bench.
Plugged it in and sure enough it did not power up.
Checked the 110/220 Volt switch and it was in the 220 position.
Moved it to 110 and tried again.
Still no display.
I did not have a manual, but, noticed a contrast control on the back.
I moved the control and now have a very good display.
And, the power meter has worked fine since.

I was pleasantly surprised as this was from a test equipment vendor.

Glenn

On 7/18/2017 10:23 PM, Bob Bownes bownes@... [hp_agilent_equipment] wrote:
I see so many folks post sad stories here or other places about buying something or other off of ebay, at a flea market, or wherever that didn't turn out well. So, I thought I would relate at least one happy tale.
A couple of weeks ago I spotted an HP 5351B on ebay listed as 'as is, fails on power up' for $150 or best offer. I made an offer that was refused, so I waited. It relisted twice with a 'buy it now' price a few $ lower each time. So I made an offer on it that was $30 less than my first offer, and it was accepted.
Based on the very loose description, the pictures of a nice looking unit with cal stickers in place, my thinking was that it couldn't be too much of oa project. Maybe re-cap, maybe replace a board, or if I was lucky, something even simpler. Even if it was a total basket case, the 10MHz ovenized oscillator was worth more than I paid for the unit.
I got lucky. Unit arrived, relatively well packed, though still with styrofoam peanuts, and undamaged. I dragged it up to the workbench and plugged it in. I was greeted with 'FAIL TIMEBASE' and a diag code. I poked at it for a few minutes, then got called away to dinner with $SPOUSE.
Over dinner, I got thinking about it and decided on a simple check. Got home, hooked the bench standard up to the 10MHz reference in and 990MHZ from the 8657A up and powered it on. Poof. 990.000.342 on the display. Looks like this unit wants to have the ref out looped back to the ref in or get a 10MHz reference. Not the first time I've seen this 'failure' mode.! So for under $100+rational shipping, I now have a 26GHz counter.
Not the first time one of these kinds of things has been found, sure won't be the last, but for me, I've had far more winners than loosers on this kind of speculation. In fact, I think the only boat anchor was the 8620 sweeper.
To, for every sad story, know there are a few happy ones. And feel free to bid on 5351Bs, I've got mine. ;)
Bob
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
---------------------------------------------------------------------------
On buying gear. A happy story.

 


I see so many folks post sad stories here or other places about buying something or other off of ebay, at a flea market, or wherever that didn't turn out well. So, I thought I would relate at least one happy tale.

A couple of weeks ago I spotted an HP 5351B on ebay listed as 'as is, fails on power up' for $150 or best offer. I made an offer that was refused, so I waited. It relisted twice with a 'buy it now' price a few $ lower each time. So I made an offer on it that was $30 less than my first offer, and it was accepted.

Based on the very loose description, the pictures of a nice looking unit with cal stickers in place, my thinking was that it couldn't be too much of oa project. Maybe re-cap, maybe replace a board, or if I was lucky, something even simpler. Even if it was a total basket case, the 10MHz ovenized oscillator was worth more than I paid for the unit.

I got lucky. Unit arrived, relatively well packed, though still with styrofoam peanuts, and undamaged. I dragged it up to the workbench and plugged it in. I was greeted with 'FAIL TIMEBASE' and a diag code. I poked at it for a few minutes, then got called away to dinner with $SPOUSE.

Over dinner, I got thinking about it and decided on a simple check. Got home, hooked the bench standard up to the 10MHz reference in and 990MHZ from the 8657A up and powered it on. Poof. 990.000.342 on the display. Looks like this unit wants to have the ref out looped back to the ref in or get a 10MHz reference. Not the first time I've seen this 'failure' mode. So for under $100+rational shipping, I now have a 26GHz counter.

Not the first time one of these kinds of things has been found, sure won't be the last, but for me, I've had far more winners than loosers on this kind of speculation. In fact, I think the only boat anchor was the 8620 sweeper.

To, for every sad story, know there are a few happy ones. And feel free to bid on 5351Bs, I've got mine. ;)

Bob
Re: (Still) need copy/scan/borrow/photo one page from HP 8673C/D service manual 08673-90022/08673-90100

 

Thanks very much, John - the link took me to a scan of the manual (and a repository of manuals) I was unaware existed.

The block diagrams, although rendered as four letter size pages, are of very good quality and will take care of the need.

Thanks very much (and thanks to the individual who offline sent me the block diagram separately I believe from the same file.)

Dave

8b. Re: (Still) need
copy/scan/borrow/photo one page from HP 8673C/D ser
? ? Posted by:? johngord@...
johncharlesgord
? ? Date: Mon Jul 17, 2017
5:01 pm ((PDT))

Dave, Is the one at this link:
,%208673D%20Operating%20&%20Service%20Vol.2.pdf
,%208673D%20Operating%20&%20Service%20Vol.2.pdf


any better?
--John Gord
Re: H'P606A, 606B Question

[email protected]
 

Hi. The only issue I've had in 20 years, is that one band position was binding. Looking inside, one of the ferrite cores had backed out and was rubbing the casting. Easy fix.

I have never understood why some people obsess about getting the dial calibrated to the width of the hairline. I use a counter on the output. Done deal.

I second the De-Oxit. I like the D100L. Works awesome and easy to apply.

ron
N4UE
Re: H'P606A, 606B Question

 

Have you tried a bit of contact cleaner/lubrication on the switches? I'd think something like a tiny drop of DeoxIT on them would fix that sort of thing.

Regards,
Barry - N4BUQ

----- Original Message -----
From: "donald collie donaldbcollie@... [hp_agilent_equipment]" <hp_agilent_equipment@...>
To: "'Dave Casey' dcasey@." <hp_agilent_equipment@...>
Sent: Tuesday, July 18, 2017 7:10:07 AM
Subject: [hp_agilent_equipment] H'P606A, 606B Question

I have one each of these fine instruments. Occasionally the output falls to
zero for no apparent reason. This can be put right by reseating the
contacts on the rotary turrets. What is going on here? - both the "A", and
the "B" do this. Is there a cure? Tnx......Don ZL4GX

<>
Virus-free.
www.avast.com
<>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
H'P606A, 606B Question

 

I have one each of these fine instruments. Occasionally the output falls to zero for no apparent reason. This can be put right by ?reseating the contacts on the rotary turrets. What is going on here? - both the "A", and the "B" do this. Is there a cure? Tnx......Don ZL4GX

Virus-free.

Re: mini SMB connector type?

 

Peter -

This in a spook radio??? Reaction and Applied Comm's
used them inter-module.? I have a few .093 cables
with them attached if you want.

JimMc


From: "Peter Gottlieb hpnpilot@... [hp_agilent_equipment]"
To: hp_agilent_equipment@...
Sent: Monday, July 17, 2017 6:54 PM
Subject: Re: [hp_agilent_equipment] mini SMB connector type?

?
From measurements and examinations of photos I'm 99% sure it's a SSMB. Never
ran into those before! I have one on order then will know 100%.

Peter

On 7/16/2017 11:01 PM, Glenn Little WB4UIV glennmaillist@...
[hp_agilent_equipment] wrote:
>
> MCX?
>
> Glenn
>
> On 7/16/2017 10:30 PM, Peter Gottlieb hpnpilot@...
> [hp_agilent_equipment] wrote:
> > I have a piece of gear which uses coaxial connectors which look like push-on SMB
> > but are somewhat smaller.
> >
> > Does anyone happen to know what they are called?
> >
> > Peter
> >
> >
> >
> > ------------------------------------
> > Posted by: Peter Gottlieb
> > ------------------------------------
> >
> >
> > ------------------------------------
> >
> > Yahoo Groups Links
> >
> >
> >
> >
>
> --
> ----------------------------------------------------------
> Glenn Little ARRL Technical Specialist QCWA LM 28417
> Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
> QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
> "It is not the class of license that the Amateur holds but the class
> of the Amateur that holds the license"
> ----------------------------------------------------------
>
>



Re: mini SMB connector type?

 

You nailed it!

Fits measurements and matches photos.

Peter

On 7/17/2017 8:46 AM, wallydoc@... [hp_agilent_equipment] wrote:

Is this it?




Wally KC9INK
Re: mini SMB connector type?

 

Never even heard of SMZ connectors. I see they are 75 ohm, perhaps that's why. The connector I need is half the diameter, 0.100" !

Pretty sure it's SSMB.

On 7/16/2017 11:42 PM, Dennis Czelusniak czelusniakd@... [hp_agilent_equipment] wrote:

I recently picked up some telco equipment that turned out to have N to SMZ adapters. Maybe you can Google and compare your connectors.

Dennis

--------------------------------------------
On Sun, 7/16/17, Peter Gottlieb hpnpilot@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

Subject: [hp_agilent_equipment] mini SMB connector type?
To: hp_agilent_equipment@...
Date: Sunday, July 16, 2017, 10:30 PM

I have a piece of gear which uses coaxial
connectors which look like push-on SMB
but are somewhat smaller.

Does anyone happen to know what they
are called?

Peter



------------------------------------
Posted by: Peter Gottlieb <hpnpilot@...>
------------------------------------


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

Yahoo Groups Links



(Yahoo! ID required)


hp_agilent_equipment-fullfeatured@...
Re: mini SMB connector type?

 

From measurements and examinations of photos I'm 99% sure it's a SSMB. Never ran into those before! I have one on order then will know 100%.

Peter

On 7/16/2017 11:01 PM, Glenn Little WB4UIV glennmaillist@... [hp_agilent_equipment] wrote:

MCX?

Glenn

On 7/16/2017 10:30 PM, Peter Gottlieb hpnpilot@...
[hp_agilent_equipment] wrote:
I have a piece of gear which uses coaxial connectors which look like push-on SMB
but are somewhat smaller.

Does anyone happen to know what they are called?

Peter



------------------------------------
Posted by: Peter Gottlieb <hpnpilot@...>
------------------------------------


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

Yahoo Groups Links



--
----------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
----------------------------------------------------------
Re: (Still) need copy/scan/borrow/photo one page from HP 8673C/D service manual 08673-90022/08673-90100

 

Dave,
Is the one at this link:

any better?
--John Gord


---In hp_agilent_equipment@..., <wb0gaz@...> wrote :

My search for page 8-43 (block diagram BD-1 on a wide-format fold-out page) from either version of the 8673C/D service manual (prelim or first version) continues.

Unfortunately Artek does not list this model in their available products (else this would certainly be a moot point as I'd gladly go to them!) The scan on HP/keysight web site is not useful for larger-format pages for this model.

So, if you have or know of someone that has this (large) old service manual and could help out with the missing page (scan/loan/buy/borrow/photo/etc.), I'd be grateful!

Dave
wb0gaz@...
Re: (Still) need copy/scan/borrow/photo one page from HP 8673C/D service manual 08673-90022/08673-90100

 

My search for page 8-43 (block diagram BD-1 on a wide-format fold-out page) from either version of the 8673C/D service manual (prelim or first version) continues.

Unfortunately Artek does not list this model in their available products (else this would certainly be a moot point as I'd gladly go to them!) The scan on HP/keysight web site is not useful for larger-format pages for this model.

So, if you have or know of someone that has this (large) old service manual and could help out with the missing page (scan/loan/buy/borrow/photo/etc.), I'd be grateful!

Dave
wb0gaz@...

#

2a. Need copy/scan/borrow one page from
HP 8673C/D service manual 08673-90022/08673-90100
? ? Posted by: "David
Feldman" wb0gaz@...
wb0gaz
? ? Date: Fri Jul 14, 2017
2:37 pm ((PDT))

Hello --

I'm in need of one page (8-43), a
wide-format fold-out containing block diagram BD-1 from
either of the above (preliminary for first printing)
versions of HP service manual for 8673C/D synthesizer.

The scan on keysight web site is not
usable for larger-format images due to severe authoring
problems (the later version of the manual 08673-90138 is
even worse - they scanned double-wide tabloid form pages
into letter format with very poor resolution.)

If you have this manual and would be
able to scan, loan or copy (or perhaps even take a series of
high-resolution photos that I could stitch together) the
requested page, could you drop me an e-mail off-list?

Thank you very much for your
assistance,

Dave
wb0gaz@...





Messages in this topic (2)
________________________________________________________________________
2b. Re: Need copy/scan/borrow one page
from HP 8673C/D service manual 08
? ? Posted by: "Dave Daniel"
kc0wjn@...
davidnickdaniel
? ? Date: Fri Jul 14, 2017
3:08 pm ((PDT))

Dave,

You might see if Artek manuals has a
copy. Their scans are of high quality and their prices are
extremely reasonable.

DaveD

Sent from a small flat thingy
Re: 8590B power supply problem

 

Hi Roland

Like yourself I am now retired after nearly sixty years in the electronics industry and keep myself sane by repairing, preferably, early solid state test gear. I particularly like Marconi because it is mainly manufactured from industry standard components unlike HP and the in house manufactured "unobtainable specials". On Sunday last I bought a none working Marconi 2022C at a rally and have got it working again.

Some years ago I had a contract with a government department to repair all of their computer power supplies, which were almost exclusively switch mode. These ranged from server PSU's to Lap Tops PSU's, over the seven years of this contract I must have repaired well over 5,000 of these, schematics simply did not exist given that, like your HP PSU, they were bought in items, usually from China.

I have since also repaired a number of HP SWPSU's which were of third part manufacture and without schematics. One of the worst were two for HP test sets which included built in inverters to allow operation from mains or 12VDC.

If you cannot find any one Local to help you I may be able to help you, I now live in Dover.

73 George G6HIG




________________________________________
From: hp_agilent_equipment@... <hp_agilent_equipment@...> on behalf of 'Roland ETIENNE' roland.etienne@... [hp_agilent_equipment] <hp_agilent_equipment@...>
Sent: 17 July 2017 16:45
To: hp_agilent_equipment@...
Subject: RE: [hp_agilent_equipment] Re: 8590B power supply problem

Hi George,

Thanks for your kind advices, I know the difficulties of working on
switching power supply...have been in electronics the past 44 years, and
sure, I do prefer repairing linear ps!
Now, I am retired, but always trying to repair equipments for
friends...sometimes, it's a real challenge!

73,
Roland F8CHK

-----Message d'origine-----
De : hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Envoy¨¦ : lundi 17 juillet 2017 15:56
? : hp_agilent_equipment@...
Objet : Re: [hp_agilent_equipment] Re: 8590B power supply problem

Hi Roland

I have been following this thread from the start.

In my experience you stand little or no chance of finding a true schematic,
what you need to do is to find someone who knows how to repair SMPSU's and
has the facilities for doing so. You can only really fault find on them
when they are fully energised by the incoming mains supply. This requires
specialist skills and precautions coupled with a safe working environment.
There are lethal voltages present (370VDC at very low impedance) also a
simple mistake can result in the SMPSU going into total self destruct mode.

73 George G6HIG
________________________________________
From: hp_agilent_equipment@...
<hp_agilent_equipment@...> on behalf of roland.etienne@...
[hp_agilent_equipment] <hp_agilent_equipment@...>
Sent: 17 July 2017 11:42
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re: 8590B power supply problem

Hi Tom,

I have the same power supply as yours and it's a faulty one also...I wonder
if you sojve your problem and if you could identify fhe HP900 component ? I
also think that it is an optocoupler, but not sure at all! It's a pity we
can't find the exact schematics of this power supply!

My primary circuitry looks fine, have made some tests connecting 12 v from
an external power supply so the NE5560 is running, signals seem to be OK on
the buck regulator and the DC-DC converter.

So may be the problem is in the feedback??

If you have any infos, I thank you in advance!

73,
Roland F8CHK

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

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

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

Yahoo Groups Links
Re: Time Interval Multimeter on HP-1725A

 

Thanks all. That got me on the path. I think this must be a 3476A as it does not exactly match the 3476B manual available online. Just knowing what it was encouraged the dismantling of same and a quick and superficial alignment per the manual the actual fault was simply very bad connections at the funky fuse/input section.

John
HP E2433-60010 Training Kit parts for HP16500x

[email protected]
 

Hi ALl,

I acquired a HP16500C.
And I want to built a HP E2433-60010 Training Kit (since I couldn't find one to buy).

Most parts are easily to be obtained, but does anybodyknow what the equivalents are of the following HP parts?

1810-1278
1251-8106
Thanks in advance,

Robert
PA1RBH
Re: 141T reference replacement..a cure??

 

¿ªÔÆÌåÓý

I forgot to fill in "For 82V, we'd use [values]", because I noticed that the values Philips used (953K and 59K)?make something like 150V instead of 116V.? I realize now that the junctions begin conducting near?6V, not (7.5 + 1.4), so we want about 120K and 9.1K .

?

The TL431 still gets my vote.? (Using 150K and 4.7K .)

From: hp_agilent_equipment@... on behalf of David Wise david_wise@... [hp_agilent_equipment]
Sent: Sunday, July 16, 2017 6:39 PM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] Re: 141T reference replacement..a cure??
?


The file 'Signalite-Hivac neon regulators-LM317.pdf' is available from this link:

in a thread called '120V, 400mW Zener Diodes?' on the UK Vintage Radio Repair and Restoration Discussion forum at

?.

I saved a copy on my hard drive.

?

But the real gem is buried in the discussion.? The Philips PM3266 scope switched from a V116R2 to a zener/transistor circuit.

See the "Unit 7 - Focus" schematic on page 29.? Scans of the manual are out there.

?

They used a BZX79-C7V5 zener, whose tempco is +4mV/K, and a BF422 darlington pair whose tempco is -4.2mV/K.? The transistor pair?is stacked on top of the zener, cancelling the tempco's, and the base is driven by a resistive voltage divider which multiplies (Vz + Vbe) by (R1+R2)/R2.? For?82V, we'd use .? Any quiet low-current zener with +4.2mV/K tempco would do.

?

However, the actual tempco of the zener is loosely controlled, +4 is just the typical value.? We're better off (and one component less) with a multiplied TL431.? This is in my opinion still the only approach that is simultaneously easy, cheap, and good.

?

Since it's the ratio and not the individual value that's important, any pair of thermally-coupled resistors with similar tempco's would work.? Metal film, carbon film, as long as the value is stable over time.

Best Regards,

Dave Wise
Re: Asymmetric trace "dot" on Hp 141-T display section

 

Hi Richard,

You were correct. I had thought astigmatism was only related to the symmetry of the focus in terms of the far edges of the CRT versus the center. A slight turn of the ASTIG pot was all it needed and now it is razor sharp. Incidentally I got my first pair of glasses today (I have astigmatism) and noticed the same thing when I looked at my computer! Razor sharp!

Thanks,

--E
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