开云体育

Mark,

Thanks! I am watching the item now!

Bob

Mark Kahrs <mark.kahrs@...> wrote:
Why bother? Just buy a 1142A supply; one is on epay right now for $9.99.

--- In hp_agilent_equipment@..., "tunerwiz" <tunerwiz@...
wrote:
> Now that all these CLIP's start to appear, was there ever anything on
> the 8753A?

I just want to add that I need a schematic for the frac-N digital
board. I have a problem on this board that seems to be heat related.

Thanks, Dean

I'm also chasing a sporadic problem with my 8753B - it appears to also be in
the Frac-N synthesiser board. Maybe a 'sticky' gate.

I've been asking around about a CLIP for about a year. Someone did contact me
with an offer of a pack for $100, which I'd be quite prepared to pay -
particularly at the current UK?-US$ exchange rate(!!) - but I lost his email
address in a bout of finger trouble.

I've also emailed Mike Kawasaki at Agilent, who has been extraordinarily
helpful, but has not been able to assist with the CLIP.

My suspicion is that the early 8753 analysers still form a revenue stream for
Agilent repair facilities, and that they are (understandably) reluctant to
allow the information into the public domain.

Cheers

Chris
GW4DGU

Why bother? Just buy a 1142A supply; one is on epay right now for $9.99.

--- In hp_agilent_equipment@..., "va7dij" <va7dij@...>
wrote:

Can anyone help me get a copy of one of these?

Agilent site, here
<;
Apro&pageMode=DS&cc=US&lc=eng>

Hi erik,

Whether you can repair HP mixers at home probably has to do
with what you have at home to work with ;-)

I would have to see the mixer in question. It probably requires
a microscope, and a wire bonding machine... but maybe not.

I have friends that have put new transistors in HP hybrids from
that time frame with a microscope, some silver epoxy, and a steady
hand.

-Chuck Harris

erik wrote:

does the unit use a 5 volt power supply?
one trick would be to build up a circuit to divide a crystal osc down to 5 hz
i think a 7492 is a divide by 12 counter.
7490 is divide by 10 in ttl

Hello group,

I have an "almost" working HP 5321A counter.
It is a small 4 Nixie tubes counter with modest frequency capability,
and my problem is that this instrument uses the 60 Hz power source as
its reference, but I live in a 50 Hz area...

According to the manual, the 50 Hz option includes changing an IC from
a "divide by 6" to a decade counter.
Nothing surprising there, but I found that the afore-mentionned decade
IC is an HP specific part: 1820-0098. (8 pin TO like metal can)
And Google only leads me to the usual sites reserved for professionnal
traders. (Sphere does not carry this reference)

So if any good soul in the group has a spare 1820-0098, or a defunct
board for an HP counter in this range (there is another decade divider
on the board, also 5321A and 5221A are basically the same instrument),
I would be glad to arrange a trade.
Alternatively a datasheet, or equivalent modern reference would allow
me to restore my 5321A to normal counting if not with original parts.

Thank you for reading,
Marc

Given the small number of pins, would it be possible to inspect the
devices' operation and use either an ECL or 'F; TTL substitute with
a small daughter board. Or, as we used to do, solder an SMT part
into the air on its legs directly so to speak and drop a blob of epoxy over it...

Whats the upper freq spec btw, havent seen a nixie counter for nigh
on 25 years ?!


Regards from


Mike Massen
Network Power Systems
Lab +61 (0) 8 9444 8961
Mb +61 (0) 438 048961
Perth, Western Australia
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oxygen and water protective barrier you can find for circuit boards.
* Special Equipment for sale: 60KVA 3

--- In hp_agilent_equipment@..., "rfiemiguy" <rhyolite@...>
wrote:

Hardy; I would be interested in your .pdf and any other 8920 related
service or cal info. Thanks

Here is direct download link
<;
Information_Packet.pdf>

Dean


<;
Information_Packet.pdf>

On Tuesday 09 January 2007 21:30, Chuck Harris wrote:
Hello ,

Thank you for the quick and detailed answer , sounds like that is my problem ,
I did inject -30dB signal directly in the input port of the mixer , problem
is te same, so mixer is blown . I suppose home-repair of a 1st mixer HP
style is not feasable ?

rgds ,
Erik

Hi,

I am not familiar with the exact part in question, but very often,
spectrum analyzer mixers are of the double balanced diode type (DBM).

When working correctly, a DBM provides at least 20dB of isolation between
the LO, RF, and IF ports. So, when you move the LO towards the low end
of the band, like you are doing at 10MHz, the LO, and IF are approaching
each other in frequency, until you hit zero (DC) Hz, where they are exactly
the same frequency. If the DBM is working correctly, it will provide you
with more than a 20DB isolation between the IF, and LO ports, which will
reduce the amount of LO that goes right into the IF port by at least 20dB.

However, if the DBM has a burned out diode, it will no longer give you
much, if any, isolation between the IF and LO ports, and you will see
a drastically larger amount of LO signal being stuffed into the IF port.
This cannot help but wreck the amplitude flatness at the low end of the
band. At the high end of the band, this lack of isolation goes all but
unnoticed because the IF filters are sufficiently steep to keep the LO
signal out of the IF port.

-Chuck Harris

ericapple2004 wrote:

Hello ,
While the spectrumanalyzer pro-and contra's are actual on this group,
may be someone can help with this:
My 70904A RF module (HP70100 analyzer) works perfectly from 10 MHz to
2.9 GHz , however below 10 MHz amplitude flatness goes down rapidly ,
-20 dB at 1 MHz .
Manual says problem with 1st mixer ??
I have difficulty to understand that the mixer can be shot and at the
same time performing above 10 MHz without problem ?

Basic layout of the first stages are : 0-70 dB attenuator ,
switchable AC -DC , then limiter 10 mW dc-3GHz , then 1st mixer ...

I would guess a series resistor burned out , becoming a nice series
capacitor that way ??

Any suggestions for repair ? Thanks Erik Belgium

PS . Other people using HP 70000 mms equipment on this group ,I like
to share experience ?

Hardy; I would be interested in your .pdf and any other 8920 related
service or cal info. Thanks

--- In hp_agilent_equipment@..., "Hardy Hansen"
<hardyhansen@...> wrote:

Hi
I have the clip for 8920a in pdf.Do believe it was taken from

agilent manual section,but were removed .

Can make a copy if needed.
Regards
Hardy
----- Original Message -----
From: nj902
To: hp_agilent_equipment@...
Sent: Monday, January 08, 2007 9:54 PM
Subject: [hp_agilent_equipment] Re: HP8920/A/B diagrams


--- In hp_agilent_equipment@..., "tunerwiz"

<tunerwiz@>

wrote:
"I often wonder if Agilent have component level diagrams for

these

units? ..."
--------------------------------------------------------

Answers to a previous thread indicated that this information

exists.

[Non-text portions of this message have been removed]

Hello,

I have the following for sale:

External Time Base 17108A/17108AM. March 1967, with changes to Nov. 1967. $5.00.

DC Power Supply SCR-3 Series, Model 6456B. May, 1967. $5.00.

DC Power Supply MPB-5 Series, Model 6286A. Dec., 1966. $5.00.

HP 5300A Measurement System Operating And Service
Manual. Revised March 1973. $15.00.

Catalogs
--------
1965 1967 1968 1969 1970
1972 1977 1978 1979 1980
1982 1988 1989

Please make an offer on ALL 13 catalogs.

All prices plus shipping.

Thank you,

Bruce WA8TNC

--- In hp_agilent_equipment@..., "tunerwiz" <tunerwiz@...>
wrote:

Now that all these CLIP's start to appear, was there ever anything on
the 8753A?

Dean

&#92;
I just want to add that I need a schematic for the frac-N digital
board. I have a problem on this board that seems to be heat related.

Thanks, Dean

Can anyone help me get a copy of one of these?

Hi,

I bought a HP 1141A RF Differential probe on eBay. It
did not come with a power supply. The power connector
looks like a 8 pin DIN connector. This would seem to
me to indicate that the power supply is more
complicated than +/- 12 volts. Can anyone help me with
a pin out of the power connector? Should I considered
buying a power supply or is it possible to build one?

Bob Hagenbach
Largo, Fl

Now that all these CLIP's start to appear, was there ever anything on
the 8753A?

Dean

Hi
I have the clip for 8920a in pdf.Do believe it was taken from agilent manual section,but were removed .
Can make a copy if needed.
Regards
Hardy

Hi Don,

If you attached the 410C calibration adjustments [OP-Amp] to the Yahoo group
It will not pass to us.

Could you mail it to this; jos.raven@...

73's
Jos
PA0amx

Hi Mike G6NCE,
I also been looking for the HP415E manuals, would it be possible to
email them to me at
garybeech@...


thank you

73's Gary VK2KYP

________________________________

From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of
thermionicguru
Sent: Tuesday, 9 January 2007 9:21 AM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re: SWR Meter 415E manual



Hi Rasputin,
I've sent the required manuals to you at your email.
Let me know if you got them ok!
Best regards.
Mike G6NCE
--- In hp_agilent_equipment@...
<mailto:hp_agilent_equipment%40yahoogroups.com> , Rasputin Novgorod
<priapulus@...> wrote:

Hi all:

I'm looking for the manuals for the HP 415E SWR Meter.
I expect Logsa has them, but I can't access there anymore
(from Canada).

I'd be grateful if someone could forward them to me, or
tell me where to go (to find them...). Send to:
Blair(at)Amtelecom.net
Replace (at) with @.

Sincerely,
Blair VBE3CZY

TM 9-4931-321-34P Direct Support and General Support Maintenance

Repair

Parts and Special Tools Lists Standing Wave Ratio Meter,
Hewlett-Packard model Y10-415E (NSN 6625-00-815-6273)

TB 9-4931-321-35 Calibration Procedure for Standing Wave Ratio meter
Hewlett-Packard model 415E and PRD model 277D

00415-90009 SWR Meter 415E covers serial prefix 0990A- and with
Appendix II Manual changes covers 719-, 545- and 530-. The Yellow
Manual Changes sheets dated 3 February 1986 have changes for: 1143A,
1709A, 1750A, 2031A, 2433A, 2507A, 2547A and 2509A.
But 2709A is too new for these changes.


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--- In hp_agilent_equipment@..., John Day <johnday@...>
wrote:

At 01:54 PM 1/4/2007, you wrote:

SERVICE MANUAL SUPPLEMENT for the 54111D, P/N 54111-90901

It would be nice if Mike Kawasaki could organize for this

supplement

which contains all the board level schematics to be uploaded on the
Agilent site. This will really help to keep these fine instruments
going.

Thanks, Dean

The full service manual with supplement is available from
'artekmedia' (David is a member of this group) on eBay. I have a
copy, yes, it is well worth it.

John

I ordered this from Dave and just want to confirm that the quality is
excellent. It includes all the schematics except the input pods. Good
work Dave!

Dean