开云体育

These look better:

(Military version)



from the same web site.

Dave

This link is resolving to a weird web page, at least for me. The asterisks look suspicious ...

Dave

They have a very nice display. A friend showed me one awhile back. But your biggest problem is finding some one local to pick it up. Cost more than it is worth to ship. Plus anything that big may not make it in one piece.

Steve

Daniel Koller wrote:

Try here:

www.hparchive.com/*Manuals*/*HP*-*410C*-*Manual*.pdf

Steve

vk5abc wrote:

I know what the technical definition of a shunt is. However this is an HP inline device that they call a "tracking generator shunt (50 ohm output)" It is used and came with the 8556A low frequency RF module as an accessory.

I doubt it is a simple shunt. But I may be wrong. It is used with the tracking generator on the 8556A, which has a 600 ohm output impedance. When you connect the TG output to a 50 ohm input you are to use this shunt to properly match the two different impedances. They also specify and provide with the unit new a 600 ohm Feed Thru Termination and a 50 ohm Feed Thru Termination. But this device they refer to as a shunt with 50 ohm output.

I am thinking it is something like a 550 ohm resistor with a 50 ohm resistor in series. The 550 ohm resistor input would be connected to the output of the 600 ohm TG. The 550 to 50 ohm junction would be connected to the input of the 50 ohm load, and the remaining end of the 50 ohm resistor would be connected to coax shield ground. That configuration would show a 600 ohm impedance for the TG and 50 ohms to the load and technically still be considered a shunt.

I built such a device and used it for the performance test (Para 4-18) and got reading within specifications for the first 10 out of 12 measurements. The two that were outside of specifications were only outside by 0.278% and 0.827%. Which may be because my resistors were not precision enough (50.22 ohms and 552.58 ohms measured with Fluke 45). Ideal is a 11/1 ratio this is a 11.032/1 ratio so may be a contributing factor. Or it maybe that my design is not what HP used. All of this is measured between 1 KHz and 300 KHz with my outside the specifications measurements being at the 250 KHz and 300 KHz frequency.

These external accessories seem to always disappear and never go with the used units. I was hopping someone might be familiar with them and give me some specific information as to exactly how they are built. At these frequencies construction is not a problem.

Steve, KJ5RV

br4av01 wrote:

Hi Dan,

You might try donating it to a local tech school or amateur radio club. All of the folks I know that are into test equipment have long ago traded up from the 8551 to 141T's and then up to portable units, or 8569's, 8568's or the 8566B, or one of the Tektronix SA's.

Although they are reasonable SA's for some hobby uses, there are better units available for decent prices. The old beasts just aren't worth the shipping cost apparently, hence the lack of interest in yours I suspect.

Good luck with it, and Happy New Year!

Steve
WB0DBS

On Dec 28, 2012, at 8:44 AM, Daniel Koller <kaboomdk@...> wrote:

Hi folks,

Is there really ZERO interest in an HP 8551 spectrum analyzer? Given that I didn't even get any comments from this usually vocal group, and having found some replies to older posts that went into my spam folder, I figured I'd just ask again (copied below). Perhaps a few more people are back from the holidays as well.

Please do let me know if the group consensus is that this thing is really just a useless boat anchor even by vintage instrument standards.

Thanks and have a happy new year!

Dan

________________________________
From: kaboomdk <kaboomdk@...>
To: hp_agilent_equipment@...
Sent: Saturday, December 22, 2012 12:48 PM
Subject: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade?



Hello all,

I have an HP 8551 spectrum analyzer I would like to offer for sale or trade. It works reasonably well, as I describe in more detail below, but I am starting to upgrade my home shop with more "modern" equipment.

Cosmetically, the unit is clean, with some sticker residue on the display units. It comes complete with all the necessary interconnecting cables and the oval power cords. It weighs a TON. The RF unit alone is 90 lbs, so I can't really ship it, even in parts. However, I live in Charlottesville, VA, and I frequently travel up the north-east corridor, so if you live anywhere between here and Burlington, VT, I am willing to deliver if you can wait until March or so. Otherwise, perhaps we can make arrangements.

Some photos are posted here:

851_1.jpg A screen shot of the analyzer showing the FM band with a dangling wire antenna and the input attenuator at 0 dB. Harmonic n=1. LO signal on left.
851_2.jpg A 1 dBm, 2.4 GHz signal at the input with RF attenuation set to 30 dB. n=2.
851_3.jpg Same signal displayed on band 4, which uses the 200 MHz IF, n=1.
851_4.jpg The FM band again, displayed on the orange-screened 851B.

I would prefer not to part this instrument out, and to send all of it to a good, loving home. Please make me an offer. I don't have a good feel for price of this instrument particularly since shipping would normally be a dominant part of the cost. Alternatively I am willing to trade for any of the instruments below, in working or *repairable* condition. Of the highest interest are any of the 141T SA plug-ins listed.

Any 8554/8555/8556 SA plug-ins for a 141T based spectrum analyzer, preferably in grey paint.
182T mainframe
any 11664 A or B detectors
a 8755C swept amplitude analyzer
a sweeper covering ~MHz to ~2.5 GHz.

So, if interested, please contact me off-list and let's discuss. Thanks and Happy Holidays!

Dan

851B/8551B Spectrum analyzer.
----------------------------
8551B: SN 625-00695 (RF unit)
851B: SN 526-00805 (Orange screen)
851B: SN 526-00339 (spare unit)

What works:
Mixer, at least at n=1, n=2 and n=3. I don't have sources to test higher harmonics.
RF input attenuator
Stabilized fine tune - with some care
Trace centering is fine at or below 1 mc/cm, alowing one to quickly zoom in on a signal.
Both 851B display units, with sharp and bright traces.
Fine and course tuning
Frequency vernier

What doesn't work:
Trace centering on the 3-300 MC/cm scales.
The signal jumps around when switching scales, though it can still be tuned.
I can't follow the manual procedure in section 3-34 to set the spectrum centering
adjustment on the front panel. The tracking meter does not respond as it should.
As a result, LO scale pointer is ~100 MC off on scales at or below the 1 mc/cm sweep and
varies on the 3-300 mc/cm scales.
May need to reglue the scale drum at some point, but it's ok for now
The orange plastic filter in one of the 851s has cracks in it in the lower left corner just off scale.
The tune knob had it's handle broken off, but I kept the original parts and was able to
epoxy together a decent looking reconstruction, so it works now and looks ok.
I can't figure out if the signal identifier works. It's supposed to shift the signal by n cm at 100 KC/cm,
which it does, but when you press the "reference" knob, it should revert to the n=1 state.
But instead the trace keeps moving off screen. I suspect this is related to the issues at large spans.

What you get:
A functional piece of history - the first calibrated spectrum analyzer from HP.
A basic, working spectrum analyzer
All interconnecting cables and oval power cords
One ORIGINAL PAPER MANUAL for the 851B display section
A spare 851B display unit (the orange one was originally paired with the 8551, judging from the stickers)
Satisfaction of working with a wonderful instrument
Herniated disks

What you don't get:
Any of the sources shown in the pictures
The instrument rack, though that can be negotiated separately
The 50 Ohm terminator on the back at the LO output. I only have a few of these and I need them,
however it seems to work ok without it at the few frequencies I looked at.
Paper manuals for the 8551B section - but these are available on-line.
The right to return the instrument
Medical insurance

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

Hi Bas,

I have some pictures of the 2 blue wires that goes from the HPIB board
in my HP5328A, I took them for another list member some time ago. I can
send them to the photos section if you are interested.

Regards,
Ignacio, EB4APL

Hi Dan,
I saw the pictures and love the unit. If I had the space I would take it.
Unfortunately, my electronics bench is in a corner of my living room, and I
have learned it is not good to test the limits of the wife.

Mike

On Friday, December 28, 2012 09:44:17 you wrote:

Hi folks,

Is there really ZERO interest in an HP 8551 spectrum analyzer? Given
that I didn't even get any comments from this usually vocal group, and
having found some replies to older posts that went into my spam folder, I
figured I'd just ask again (copied below). Perhaps a few more people are
back from the holidays as well.

Please do let me know if the group consensus is that this thing is really
just a useless boat anchor even by vintage instrument standards.

Thanks and have a happy new year!

Dan



________________________________
From: kaboomdk <kaboomdk@...>
To: hp_agilent_equipment@...
Sent: Saturday, December 22, 2012 12:48 PM
Subject: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade?



Hello all,

I have an HP 8551 spectrum analyzer I would like to offer for sale or
trade. It works reasonably well, as I describe in more detail below, but
I am starting to upgrade my home shop with more "modern" equipment.

Cosmetically, the unit is clean, with some sticker residue on the display
units. It comes complete with all the necessary interconnecting cables
and the oval power cords. It weighs a TON. The RF unit alone is 90 lbs,
so I can't really ship it, even in parts. However, I live in
Charlottesville, VA, and I frequently travel up the north-east corridor,
so if you live anywhere between here and Burlington, VT, I am willing to
deliver if you can wait until March or so. Otherwise, perhaps we can make
arrangements.

Some photos are posted here:

/pic/list

851_1.jpg A screen shot of the analyzer showing the FM band with a

dangling

wire antenna and the input attenuator at 0 dB. Harmonic n=1. LO signal
on left. 851_2.jpg A 1 dBm, 2.4 GHz signal at the input with RF
attenuation set to 30 dB. n=2. 851_3.jpg Same signal displayed on band
4, which uses the 200 MHz IF, n=1. 851_4.jpg The FM band again, displayed
on the orange-screened 851B.

I would prefer not to part this instrument out, and to send all of it to a
good, loving home. Please make me an offer. I don't have a good feel for
price of this instrument particularly since shipping would normally be a
dominant part of the cost. Alternatively I am willing to trade for any of
the instruments below, in working or *repairable* condition. Of the
highest interest are any of the 141T SA plug-ins listed.

Any 8554/8555/8556 SA plug-ins for a 141T based spectrum analyzer,
preferably in grey paint. 182T mainframe
any 11664 A or B detectors
a 8755C swept amplitude analyzer
a sweeper covering ~MHz to ~2.5 GHz.

So, if interested, please contact me off-list and let's discuss. Thanks
and Happy Holidays!

Dan

851B/8551B Spectrum analyzer.
----------------------------
8551B: SN 625-00695 (RF unit)
851B: SN 526-00805 (Orange screen)
851B: SN 526-00339 (spare unit)

What works:
Mixer, at least at n=1, n=2 and n=3. I don't have sources to test higher
harmonics. RF input attenuator
Stabilized fine tune - with some care
Trace centering is fine at or below 1 mc/cm, alowing one to quickly zoom in
on a signal. Both 851B display units, with sharp and bright traces.
Fine and course tuning
Frequency vernier

What doesn't work:
Trace centering on the 3-300 MC/cm scales.
The signal jumps around when switching scales, though it can still be
tuned. I can't follow the manual procedure in section 3-34 to set the
spectrum centering adjustment on the front panel. The tracking meter does
not respond as it should. As a result, LO scale pointer is ~100 MC off on
scales at or below the 1 mc/cm sweep and varies on the 3-300 mc/cm scales.
May need to reglue the scale drum at some point, but it's ok for now
The orange plastic filter in one of the 851s has cracks in it in the lower
left corner just off scale. The tune knob had it's handle broken off, but
I kept the original parts and was able to epoxy together a decent looking
reconstruction, so it works now and looks ok. I can't figure out if the
signal identifier works. It's supposed to shift the signal by n cm at 100
KC/cm, which it does, but when you press the "reference" knob, it should
revert to the n=1 state. But instead the trace keeps moving off screen. I
suspect this is related to the issues at large spans.

What you get:
A functional piece of history - the first calibrated spectrum analyzer from
HP. A basic, working spectrum analyzer
All interconnecting cables and oval power cords
One ORIGINAL PAPER MANUAL for the 851B display section
A spare 851B display unit (the orange one was originally paired with the
8551, judging from the stickers) Satisfaction of working with a wonderful
instrument
Herniated disks

What you don't get:
Any of the sources shown in the pictures
The instrument rack, though that can be negotiated separately
The 50 Ohm terminator on the back at the LO output. I only have a few of
these and I need them, however it seems to work ok without it at the few
frequencies I looked at. Paper manuals for the 8551B section - but these
are available on-line. The right to return the instrument
Medical insurance

--
Mike McGinn KD2CNU
Ex Uno Plurima
No electrons were harmed in sending this message, some were inconvenienced.
** Registered Linux User 377849

Hi folks,

? ?Is there really ZERO interest in an HP 8551 spectrum analyzer? ?Given that I didn't even get any comments from this usually vocal group, and having found some replies to older posts that went into my spam folder, I figured I'd just ask again (copied below). ?Perhaps a few more people are back from the holidays as well. ?

? Please do let me know if the group?consensus?is that this thing is really just a useless boat anchor even by vintage instrument standards. ?

?Thanks and have a happy new year!

? Dan



________________________________
From: kaboomdk <kaboomdk@...>
To: hp_agilent_equipment@...
Sent: Saturday, December 22, 2012 12:48 PM
Subject: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade?


?
Hello all,

I have an HP 8551 spectrum analyzer I would like to offer for sale or trade. It works reasonably well, as I describe in more detail below, but I am starting to upgrade my home shop with more "modern" equipment.

Cosmetically, the unit is clean, with some sticker residue on the display units. It comes complete with all the necessary interconnecting cables and the oval power cords. It weighs a TON. The RF unit alone is 90 lbs, so I can't really ship it, even in parts. However, I live in Charlottesville, VA, and I frequently travel up the north-east corridor, so if you live anywhere between here and Burlington, VT, I am willing to deliver if you can wait until March or so. Otherwise, perhaps we can make arrangements.

Some photos are posted here:

851_1.jpg A screen shot of the analyzer showing the FM band with a dangling wire antenna and the input attenuator at 0 dB. Harmonic n=1. LO signal on left.
851_2.jpg A 1 dBm, 2.4 GHz signal at the input with RF attenuation set to 30 dB. n=2.
851_3.jpg Same signal displayed on band 4, which uses the 200 MHz IF, n=1.
851_4.jpg The FM band again, displayed on the orange-screened 851B.

I would prefer not to part this instrument out, and to send all of it to a good, loving home. Please make me an offer. I don't have a good feel for price of this instrument particularly since shipping would normally be a dominant part of the cost. Alternatively I am willing to trade for any of the instruments below, in working or *repairable* condition. Of the highest interest are any of the 141T SA plug-ins listed.

Any 8554/8555/8556 SA plug-ins for a 141T based spectrum analyzer, preferably in grey paint.
182T mainframe
any 11664 A or B detectors
a 8755C swept amplitude analyzer
a sweeper covering ~MHz to ~2.5 GHz.

So, if interested, please contact me off-list and let's discuss. Thanks and Happy Holidays!

Dan

851B/8551B Spectrum analyzer.
----------------------------
8551B: SN 625-00695 (RF unit)
851B: SN 526-00805 (Orange screen)
851B: SN 526-00339 (spare unit)

What works:
Mixer, at least at n=1, n=2 and n=3. I don't have sources to test higher harmonics.
RF input attenuator
Stabilized fine tune - with some care
Trace centering is fine at or below 1 mc/cm, alowing one to quickly zoom in on a signal.
Both 851B display units, with sharp and bright traces.
Fine and course tuning
Frequency vernier

What doesn't work:
Trace centering on the 3-300 MC/cm scales.
The signal jumps around when switching scales, though it can still be tuned.
I can't follow the manual procedure in section 3-34 to set the spectrum centering
adjustment on the front panel. The tracking meter does not respond as it should.
As a result, LO scale pointer is ~100 MC off on scales at or below the 1 mc/cm sweep and
varies on the 3-300 mc/cm scales.
May need to reglue the scale drum at some point, but it's ok for now
The orange plastic filter in one of the 851s has cracks in it in the lower left corner just off scale.
The tune knob had it's handle broken off, but I kept the original parts and was able to
epoxy together a decent looking reconstruction, so it works now and looks ok.
I can't figure out if the signal identifier works. It's supposed to shift the signal by n cm at 100 KC/cm,
which it does, but when you press the "reference" knob, it should revert to the n=1 state.
But instead the trace keeps moving off screen. I suspect this is related to the issues at large spans.

What you get:
A functional piece of history - the first calibrated spectrum analyzer from HP.
A basic, working spectrum analyzer
All interconnecting cables and oval power cords
One ORIGINAL PAPER MANUAL for the 851B display section
A spare 851B display unit (the orange one was originally paired with the 8551, judging from the stickers)
Satisfaction of working with a wonderful instrument
Herniated disks

What you don't get:
Any of the sources shown in the pictures
The instrument rack, though that can be negotiated separately
The 50 Ohm terminator on the back at the LO output. I only have a few of these and I need them,
however it seems to work ok without it at the few frequencies I looked at.
Paper manuals for the 8551B section - but these are available on-line.
The right to return the instrument
Medical insurance




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

G'day Lee

If you dont find a free copy , We have a professional reproduction
quality scan at a reasonable price

www.ArtekManuals.com

Cheers
73 de NR1DX
Dave

--
Dave Henderson
Manuals@...
www.Artekmanuals.com
PO Box 175
Welch,MN 55089
651-269-4265

On 12/20/2012 5:08 AM, David C. Partridge wrote:

The 16700 is awfully picky about keyboards.
Of the mini keyboards, I found the Cherry G84-4100
(PS2 type, not USB) to work OK.

Dave

AND

On 12/19/2012 10:12 PM, Glen Slick wrote:

I've had good luck using Cherry G84-4100 / ML4100 native PS/2

keyboards on

16700 series logic analyzers. There are always several used and

unused ones

listed on eBay. They are close to 11" x 5" in size.

-Glen

So I quickly found a new one on ebay for a very reasonable US $35 and $10 priority shipping, and just tried it out.

It works very well on my HP 16700A. I'm very happy with the overall quality, construction, look and feel, etc of the G84-4100.

No connection outside of a happy customer:



This guy has plenty of brand new in the box keyboards.

These keyboards are easily twice the price from a standard reseller and they might not have the regular PS/2 only version available.

Thanks for the help.
Keith

Hello All
Does anyone have a manual for the last version of the 410c meter solid state version.

Lee.

Don,
thanks for the advice. I could do this in the next days. I will post the results.
Antonio I8IOV

Steve,
A shunt means something in parallel. Shunt resistors are most commonly used in meter circuits. The shunt (or, low ohm resistor) is in parallel with the meter. There is no voltage divider.

If you need a 50 ohm termination, just use a 50 ohm resistor. What DO you need, anyway?

-br4

Thanks a lot of this.

I just managed to get a 8568B that attenuator has some problems with the 20dB step.

These instructions encourage me to open the attenuator and clean the pads with isopropyl alcohol. Now it works fine.

I didn't made a testped for it i just cold moved carefully the solenoids and checked with dg8saq vnwa the attenuator pads. I'm not sure is the solenoid stuck or is it actually a contact failure.

The instructions how to disaasemble the attenuator was very accurate and easy to follow.

BR, Jarmo

Both the 260-A Q-Meter and the 250-A RX Meter were made under the HP brand. Development continued for a while in NJ. A 250-B was made.

The 260-A was replaced by the 4342A.

RX meters vanished and were replaced by VNA's



One not mentioned was the higher frequency Q-Meter, the 190-A. I have
a 190B, which is different andappears to be almost production. With
it came some design notes on a redesign replacing the tubes with transistors. Sadly no names on any of the notes.

There are a couple useful sites for the 260-A

(manuals)



k5bcq talks about making his own work coils, for a long time 103A's were pretty much non existent. But over the past 3 to 4 years they have been showing up. The ones above 5 MHz are still pretty rare.

And if your patient the 518A standards can be had.

Hello looking for someone who has the frequency counter Systron Donner 6054b? (I own the service manual) be able to compare the measures to repair my thanks for the help
Roberto

I am looking for a BNC Fuse Holder. Anyone have one they
will part with ?

Thanks, Dick, W1KSZ

Hi,

The key panel data entry encoder on my HP54542C scope has worn out. Anyone know of a source for replacements?

Numbers on the encoder are: 9436, and 1-2-36.

The part is listed as replaceable by entire board assembly with part number 54542-66506, though it's pretty easy to just change the encoder.

I tried to repair it but the plating on the encoder PCB is about done for. It works again but who knows for how long.

Thanks.