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Date
Re: What is a good shortwave radio to use with HP 8568B SA?

 

Duh! A USB SDR dongle with an up converter! The thought never entered my mind. What great way to go. I was thinking more strictly hardware (with my limited mindset). The funny thing is, I have one of those dongles and really never pushed it close to what it's capable off. I'll have to give it a try.

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

Try one of the emergency radios with AM-FM-SSB.

Or, a $20. RTL-SDR USB dongle on your computer with a Ham-it-Up
HF converter between it and your HP 20mHz output.

All-mode 0.5 - 900+ mHz plus a bunch of other useful features
for under $100.

Thank you for your response. I would prefer both AM, FM and SSB but
economic compromises may have to be made. FM at a minimum.

As to the frequency, I was assuming that I would be able to use the
20-something megahertz IF connector on the back of the spectrum analyzer.
That's why I was thinking about a shortwave receiver; I know I've heard of
other people doing this.


On Fri, Dec 28, 2012 at 4:16 PM, J. Forster <jfor@...> wrote:

What frequency range are you looking for?

I usewd a DEI R-1037F telemetry receiver on the 227 MHz IF output of an
AIL 757 SA.

Do you need AM / FM / other?

-John


--

Thanks! & 73, KD4E.com
David Colburn nevils-station.com
I don't google I SEARCH! duckduckgo.com
Network: groups.yahoo.com/group/qrv
Restored to design-spec at Heaven's gate 1Cor15:22
Re: What is a good shortwave radio to use with HP 8568B SA?

 

Pretty much any shortwave radio that tunes 21.4 MHz and the modes you want should work. Sensitivity is not an issue as the IF output on the rear is a high level (you'd likely need an attenuator). For AM, you can find many cheap radios that would work. Adding SSB and FM is going to push the price up somewhat. If you're looking to do wide FM, you'll need to up convert to FM broadcast band or look into the high end receivers like the NorCal or Dana class receivers at 21.4. Remember that you'll need to use the zero span mode and won't be able to view the spectrum while monitoring.

--- In hp_agilent_equipment@..., Bryce Schroeder <bryce.schroeder@...> wrote:

Thank you for your response. I would prefer both AM, FM and SSB but
economic compromises may have to be made. FM at a minimum.

As to the frequency, I was assuming that I would be able to use the
20-something megahertz IF connector on the back of the spectrum analyzer.
That's why I was thinking about a shortwave receiver; I know I've heard of
other people doing this.


On Fri, Dec 28, 2012 at 4:16 PM, J. Forster <jfor@...> wrote:

What frequency range are you looking for?

I usewd a DEI R-1037F telemetry receiver on the 227 MHz IF output of an
AIL 757 SA.

Do you need AM / FM / other?

-John

=============


I am looking for a shortwave radio to use as a demodulator for my
spectrum
analyzer, so I can listen to the signals I see. I don't have a shortwave
receiver right now. Can someone make a recommendation, preferably for
something relatively inexpensive?

Thank you!


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




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

Yahoo! Groups Links
Re: What is a good shortwave radio to use with HP 8568B SA?

[email protected]
 

Try one of the emergency radios with AM-FM-SSB.

Or, a $20. RTL-SDR USB dongle on your computer with a Ham-it-Up
HF converter between it and your HP 20mHz output.

All-mode 0.5 - 900+ mHz plus a bunch of other useful features
for under $100.

Thank you for your response. I would prefer both AM, FM and SSB but
economic compromises may have to be made. FM at a minimum.

As to the frequency, I was assuming that I would be able to use the
20-something megahertz IF connector on the back of the spectrum analyzer.
That's why I was thinking about a shortwave receiver; I know I've heard of
other people doing this.


On Fri, Dec 28, 2012 at 4:16 PM, J. Forster <jfor@...> wrote:

What frequency range are you looking for?

I usewd a DEI R-1037F telemetry receiver on the 227 MHz IF output of an
AIL 757 SA.

Do you need AM / FM / other?

-John
--

Thanks! & 73, KD4E.com
David Colburn nevils-station.com
I don't google I SEARCH! duckduckgo.com
Network: groups.yahoo.com/group/qrv
Restored to design-spec at Heaven's gate 1Cor15:22
Re: HP 8551 Spectrum Analyzer FS or trade?

 

Hi Daniel.

If I remember correctly, and more and more lately I don't, the 8551 came with different front end modules for different frequency coverage's. What is the frequency range of yours? If it fits my needs I would be willing to pay for professional packing and the shipping charges to get it.

Regards.

Max. K 4 O DS.

Email: max@...

Transistor site
Vacuum tube site:
Woodworking site
Music site:

To subscribe to the fun with transistors group send an email to.
funwithtransistors-subscribe@...

To subscribe to the fun with tubes group send an email to,
funwithtubes-subscribe@...

To subscribe to the fun with wood group send a blank email to
funwithwood-subscribe@...

----- Original Message -----
From: "Daniel Koller" <kaboomdk@...>
To: <hp_agilent_equipment@...>
Sent: Friday, December 28, 2012 8:44 AM
Subject: Re: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade?


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








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

Yahoo! Groups Links
Re: What is a good shortwave radio to use with HP 8568B SA?

 

Thank you for your response. I would prefer both AM, FM and SSB but
economic compromises may have to be made. FM at a minimum.

As to the frequency, I was assuming that I would be able to use the
20-something megahertz IF connector on the back of the spectrum analyzer.
That's why I was thinking about a shortwave receiver; I know I've heard of
other people doing this.

On Fri, Dec 28, 2012 at 4:16 PM, J. Forster <jfor@...> wrote:

What frequency range are you looking for?

I usewd a DEI R-1037F telemetry receiver on the 227 MHz IF output of an
AIL 757 SA.

Do you need AM / FM / other?

-John

=============


I am looking for a shortwave radio to use as a demodulator for my
spectrum
analyzer, so I can listen to the signals I see. I don't have a shortwave
receiver right now. Can someone make a recommendation, preferably for
something relatively inexpensive?

Thank you!







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

Yahoo! Groups Links
Re: HP-IB / GPIB Printer Emulator

 

It's not free, but PrintCapture does
exactly what you are looking for. Based on my experience, it's an
excellent product.

I bought a copy and use it with some older HP gear, although KE5FX's
plotter emulator sees the most use at my shop.

Jack K8ZOA

On 12/28/2012 4:33 PM, martin_u_fischer wrote:

Hello Community,

many HP instruments (spectrum analyzer, oscilloscope) have a dedicated
plot menu
for outputting vector trace data and a separate print menu for
outputting list data,
texts or raster graphics.

For screen plots, you all know John Miles? (KE5FX) excellent 7470.EXE
plotter emulator
which captures HP-GL/2 plot data via HP-IB and a HP-IB/USB adapter
(Prologix, HP 82357A/B etc.)
and stores them into a .plt file or renders them into a printable .BMP
or .GIF graphic file.

Printers with HP-IB Interface (e. g. the HP 2225A ThinkJet) are long
gone, so...

Would anybody know a free software solution for capturing (PCL) print
data
via HP-IB and a HP-IB/USB adapter to a PC for storing them into a
graphic file,
a print file or outputting them on an attached printer (e. g. LaserJet)?

The name of the software might be KE5FX LaserJet.EXE printer
emulator... ;-)

Any hints much appreciated.

Regards,
and a Happy New Year
Martin
HP-IB / GPIB Printer Emulator

 

Hello Community,

many HP instruments (spectrum analyzer, oscilloscope) have a dedicated plot menu
for outputting vector trace data and a separate print menu for outputting list data,
texts or raster graphics.

For screen plots, you all know John Miles? (KE5FX) excellent 7470.EXE plotter emulator
which captures HP-GL/2 plot data via HP-IB and a HP-IB/USB adapter (Prologix, HP 82357A/B etc.)
and stores them into a .plt file or renders them into a printable .BMP or .GIF graphic file.

Printers with HP-IB Interface (e. g. the HP 2225A ThinkJet) are long gone, so...

Would anybody know a free software solution for capturing (PCL) print data
via HP-IB and a HP-IB/USB adapter to a PC for storing them into a graphic file,
a print file or outputting them on an attached printer (e. g. LaserJet)?

The name of the software might be KE5FX LaserJet.EXE printer emulator... ;-)


Any hints much appreciated.

Regards,
and a Happy New Year
Martin
Re: HP 8551 Spectrum Analyzer FS or trade?

Dave Brown
 

Once the BWO has been replaced with the YIG upgrade kit thats no longer an issue- does this one have that upgrade applied?
73
Dave, ZL3FJ
Christchurch, NZ

----- Original Message -----
From: <d.seiter@...>
To: "hp agilent equipment" <hp_agilent_equipment@...>
Sent: Saturday, December 29, 2012 8:13 AM
Subject: Re: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade?


Another problem with the 8551 (besides its' weight and therefore very high shipping cost) it it's use of a BWO. They have a limited lifespan, and new old stock are like hen's teeth. I got a nice one from the local estate sale of a ham about three years ago, and it had multiple reminders on it about not leaving it fully powered up for long periods of time. It also can with three random BWOs and two HP sweepers that also use BWOs.


In talking with a few old timers I know from HP since then, the general consensus was similar. They didn't worry about it at the time because they could get new ones from Varian just down the road.


-Dave

----- Original Message -----
From: "Daniel Koller" <kaboomdk@...>
To: "hp agilent equipment" <hp_agilent_equipment@...>
Sent: Friday, December 28, 2012 6:44:17 AM
Subject: Re: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade?






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








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

Yahoo! Groups Links
Re: What is a good shortwave radio to use with HP 8568B SA?

J. Forster
 

What frequency range are you looking for?

I usewd a DEI R-1037F telemetry receiver on the 227 MHz IF output of an
AIL 757 SA.

Do you need AM / FM / other?

-John

=============

I am looking for a shortwave radio to use as a demodulator for my spectrum
analyzer, so I can listen to the signals I see. I don't have a shortwave
receiver right now. Can someone make a recommendation, preferably for
something relatively inexpensive?

Thank you!
What is a good shortwave radio to use with HP 8568B SA?

 

I am looking for a shortwave radio to use as a demodulator for my spectrum
analyzer, so I can listen to the signals I see. I don't have a shortwave
receiver right now. Can someone make a recommendation, preferably for
something relatively inexpensive?

Thank you!
Re: DIY: Repair of HP Step Attenuators

Steve Reeves
 

I've used a piece of clear tape on the inside edges of the c-frame - works great.

Steve

Sent from my iPod

On Dec 28, 2012, at 2:00 PM, "i5spo" <piero.soldi@...> wrote:



Hi Jarmo,

maybe you have one cell stuck, due to magnetization of the small actuator... Can be locked to the ceiling of attenuator case.
This appened to a good friend of mine, Art iw7jwy.

So the 20 dB cell is always on. Try to do a calibration of S.A.
If it fails, open and check the small 20 dB relay actuator.
A simple repair is to glue a mall tab of mylar inside, on the roof of attenuator, over the sluggish relay actuator.

HTH, Piero.

--- In hp_agilent_equipment@..., "Jarmo" <jarmoblo@...> wrote:

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

[Non-text portions of this message have been removed]
Looking for an HP carcass.........

 

I have decided that I would prefer to have my GPSDO in a retired HP full width, 3-1/4" high enclosure so it can go in the stack with all the other stuff. Does anyone have a beyond repair instrument that you would be willing to part with? Something similar in size to the 3456 or the 5334 would be perfect. I am not looking for free, but really cheap would be nice.

I am in Cleveland, OH, USA 44107

Thanks for looking......

Cheers
Re: HP 8551 Spectrum Analyzer FS or trade?

[email protected]
 

Another problem with the 8551 (besides its' weight and therefore very high shipping cost) it it's use of a BWO. They have a limited lifespan, and new old stock are like hen's teeth. I got a nice one from the local estate sale of a ham about three years ago, and it had multiple reminders on it about not leaving it fully powered up for long periods of time. It also can with three random BWOs and two HP sweepers that also use BWOs.


In talking with a few old timers I know from HP since then, the general consensus was similar. They didn't worry about it at the time because they could get new ones from Varian just down the road.


-Dave

----- Original Message -----
From: "Daniel Koller" <kaboomdk@...>
To: "hp agilent equipment" <hp_agilent_equipment@...>
Sent: Friday, December 28, 2012 6:44:17 AM
Subject: Re: [hp_agilent_equipment] HP 8551 Spectrum Analyzer FS or trade?






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]
Re: DIY: Repair of HP Step Attenuators

i5spo
 

Hi Jarmo,

maybe you have one cell stuck, due to magnetization of the small actuator... Can be locked to the ceiling of attenuator case.
This appened to a good friend of mine, Art iw7jwy.

So the 20 dB cell is always on. Try to do a calibration of S.A.
If it fails, open and check the small 20 dB relay actuator.
A simple repair is to glue a mall tab of mylar inside, on the roof of attenuator, over the sluggish relay actuator.

HTH, Piero.

--- In hp_agilent_equipment@..., "Jarmo" <jarmoblo@...> wrote:

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
Re: hp 410c manual

 

--- In hp_agilent_equipment@..., "vk5abc" <vk5abc@...> wrote:



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

Lee.
Don't know if this is the version you're after, but you can down the 410C manual from Agilent's website at
The dowmload contains both 00410-90007 (May 74) and 00410-90009 (Mar 81)manuals.
Not the highest quality scans, but still readable.

Cheers,
Dave M
Re: hp 410c manual

 

These look better:

(Military version)



from the same web site.

Dave

On 12/28/2012 10:26 AM, Steve Vineyard wrote:
Try here:

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

Steve

vk5abc wrote:


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

Lee.

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

Yahoo! Groups Links
Re: hp 410c manual

 

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

Dave

On 12/28/2012 10:26 AM, Steve Vineyard wrote:
Try here:

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

Steve

vk5abc wrote:


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

Lee.

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

Yahoo! Groups Links
Re: HP 8551 Spectrum Analyzer FS or trade?

 

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:


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@... <mailto:kaboomdk%40yahoo.com>>
To: hp_agilent_equipment@... <mailto:hp_agilent_equipment%40yahoogroups.com>
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
Re: hp 410c manual

 

Try here:

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

Steve

vk5abc wrote:




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

Lee.
Re: HP 11660A Shunt for HP 8556A

 

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:



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
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