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  1. HP-Agilent-Keysight-Equipment
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Expanded Topics Messages
Date
Re: Another dead 8753D YTO

 

Hi Scott,
?
I'll try answer your questions.
Let me first explain the differences between HP8753B & C and newer versions such as D/E/ES/ET.
?
B&C achieves its RF output by mixing a fixed YIG oscillator at 3.8GHz and a YIG Tune Oscillator sweeping between 3.8-6.8GHz. This gives a range of 0-3GHz. The 6GHz option on the B & C versions are done by a frequency doubler.
?
D and newer versions also uses a 3.8GHz YIG oscillator and without the 6 GHz option the YTO sweeps between 3.8-6.8GHz just as the B&C versions. But the D/E/ES/ET 6 GHz does not utilize a frequency double, instead it uses the YTO directly without mixing, i.e. the 6GHz option requires the YTO to be able to sweep between 3-6.8GHz.
?
For more details regarding this I recommend reading the "theory of operation chapters" in the service manuals for respective model.
?
Simon's excellent documentation refers to HP8753C, I have repaired a HP8753D so the YTO requirements differs.
?
1) I have not tried to decode YIG part numbers, some manufacturers have frequency range in the model number, some don't, some does but only on certain model series.
?
a) To repair a B or C version you might get away with a 4-8GHz YTO, if it manages to have enough output power at 3.8GHz. I would certainly take my chances on this. But probably not for a 8753D/E/ES/ET 6GHz replacement which requires enough output power at 3GHz. I guess some 4-8GHz YTO won't even oscillate at 3GHz.
?
My experience is that many YTO works in a similar way with their current consumption and how they need to be controlled. For me the HP economy YTOs are the exception with not requiring negative voltage and only consume less than half the main coil current.
?
b) See above.
c) probably, the Wiltron YTO I used tunes over 2.5GHz-8GHz. The thing is to make the A11 controller give the correct amount of current for the desired frequency.
d) See above
e) No idea
?
I would not buy a original replacement unless it was guaranteed that is has been refurbished. Otherwise it will break sooner than later.
?
Smart people: I relied heavily the work of Simon and had some help from a friend that knows electronics well, I just know enough to know when to ask for help.
?
Best regards
Marcus
option 059 story for HP8444

 

voir ici
bonne chance
?
Re: HP instrument sticky case panel surface

 

When I got my 8510C system, it was a severe case of sticky covers, all of the boxes.
I have tried many recommended detergents with increasing solvent strength which didn't work for me:
household detergent => no
ethanol, isopropanol => no
WD40 => no
Gasoline => no
What finally worked for me was Orange Terpene.
?
The sticky stuff is bleeding out of the plastic. It doesn't automatically happen with age.
I have identical covers that are older and not sticky at all. It must have to do with other stuff in the surrounding atmosphere during storage.
?
Tom
?
Re: HP 3586 counter reading high

 

Paul,

I would like to offer another solution for dealing with the drift caused by the crystal controlled oscillators associated with the HP3586B's Product Detector. My method completely eliminates the drift problem and requires only a minor modification to pick off the 15,625 Hz I.F. signal within the 3586B, or any of the 3586 series SLM's. This method only requires a change in how you go about making absurdly accurate frequency measurements.

See:

Burt, K6OQK

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
biwa@...
K6OQK



--
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, CA 91201 U.S.A.
K6OQK
Re: HP instrument sticky case panel surface

 

I have successfully removed the sticky surfaces that developed on the top and bottom panels of my old HP equipment by cleaning the panel surface with a solution of simple green. I keep the Simple Green concentrate in my stock of cleaning products so that I can mix various strengths for various tasks the strongest being a 1:1 mix for heavy de-greasing. Even that strong solution did not damage the panel. I followed up with a wipe down with water and, years later, the sticky film has not returned. Of course, the panel was removed from the instrument before cleaning.
Re: HP 3586 counter reading high

 

Hi Paul,

When you two were working on this mod, did you consider using
the clock input on the pic to condition your 10MHz clock reference,
and use one of the timer/dividers, to create the clock for your
DDS chip?

The 8 pin PIC's are kind of limited, you might have to pop up to
a 14 pin to get all of the features you need... But you should
also be able to lose the transistor clock conditioner circuit...

Just a thought.

-Chuck Harris


On Mon, 11 Nov 2024 17:56:13 -0500 "paulswed via groups.io"
<paulswedb@...> wrote:
Quite sometime ago maybe 10 years a Ham in Canada did indeed make a
BFO replacement that was synthesized. I built up a unit and it worked
very well. I suspect I might have the details around still.
The link still exists

So there you go.
Paul
WB8TSL
Re: HP/Agilent/Keysight test equipment. - Digest #5062

 

¿ªÔÆÌåÓý



-------- Email original --------

Objet: Re: [HP-Agilent-Keysight-equipment] HP/Agilent/Keysight test equipment. - Digest #5062
Date: 12/11/2024 10:09 am
De: f1chf@...
?: "[email protected]" <[email protected]>


seems possible

need option 59 (a 500 mhz oscillator ) and a cable?

have a look here

good luck



Le 12/11/2024 4:16 am, [email protected] a ¨¦crit?:

?
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Topics in this digest:
.
1. Re: Fitting rack ears to ageing HP equipment (3)
2. FTGH: 98629A balanced test connector
3. Re: A Caution- leaking and fuming batteries (2)
4. Re: HP 3586 counter reading high (4)
5. Can an 8444A be used with an 8569B?
6. Re: Another dead 8753D YTO
messages:
.
1a.?
Re: Fitting rack ears to ageing HP equipment
From: factory
Date: Mon, 11 Nov 2024 21:33:42 CET


I've always used an old hairdryer to soften the adhesive, an old flat blade dining knife of the type that was commonly made in Sheffield or Manchester can be used to pry, these days they sell the blade without a handle under the name 'spudger'
?
Alternately if you can access the other side, use a small screwdriver to push the strip from the back, while heating, there are some holes in the cast frame, the same ones that the handles attach too.
?
David
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1b.?
Re: Fitting rack ears to ageing HP equipment
From: Jeremy Nichols
Date: Mon, 11 Nov 2024 21:50:01 CET


Worst case, acetone will soften/loosen the adhesive, but be careful not to spill it on sensitive areas of the instrument and don't drink it!?
?
A little acetone will return stickiness to old trim strips, if you have a need to put one back, or fresh double-side foam tape will also work.?

Jeremy?
?
?
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1c.?
Re: Fitting rack ears to ageing HP equipment
From: Tim Barrett K9VB
Date: Tue, 12 Nov 2024 04:16:23 CET


Thanks all for the advice which gave me the encouragement to persist. In the end a combination of heat and a very thin bladed screwdriver did the trick. My next step was to use acetone but I didn't have any in the house and in the event it was not needed. As always even a cosmetic addition to a piece of HP gear was built like a tank!
?
Tim K9VB
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2a.?
FTGH: 98629A balanced test connector
From: Leo Potjewijd
Date: Mon, 11 Nov 2024 23:28:24 CET


Found in the pile: a balanced test connector type 98629A.
I have no use for it, so for P&P only it can come your way.
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3a.?
Re: A Caution- leaking and fuming batteries
From: si_emi_01
Date: Mon, 11 Nov 2024 23:46:29 CET

That happened in my McIntosh MAC4200 Stereo Receiver I purchased off of ebay. When I checked it out, the 3 AA size NiCd Battery Pack had failed. It ate the paint under the Battery Holder plus the Paint and Primer down to the Bare Metal. It had also crept for at least 1" beyond the foot print of the Battery pack. And yes, the leaking wicked down the lead wires onto a circuit card causing connector damage, it ate a couple of traces and left crud on the board. Lots of FOD and work to clean it all up and fix it.

?

I replaced the whole NiCd Battery Pack with a 4 Farad 5.5V Super Capacitor. It was mounted to a G10 Prototype board. I pre-charged the Capacitor before connection. I also replaced the charging Resistor with a higher value and wattage for when it had power disconnected for long periods or a power outage for days (which I tested ¨C our power is very stable, maybe a power loss for a couple of hours per year).

?

There was already a reverse current Diode in the circuit so, I didn't need to add one. The Memory-Hold Voltage Range was 3.0V minimum ¨C an important data point because a Capacitor discharge curve is different than a NiCd, but similar enough to allow the change. I also made sure the +5V Power source was healthy (Bridge Rectifier, Regulator, well heatsinked and new 105C Bulk Capacitors) to avoid any future concerns.

?

Not original, but has worked well now for almost 5 years, it is designed to be reliable and safe. I know it won't happen again.

?

Here is a picture of the modification before I cleaned everything up.

?

?

?

?

?

All of the above items need to be investigated to make sure that what you are doing is in the best interest of any equipment modification and safety. Some people, as it has been stated before, replace rechargeable battery packs with other types of batteries (I have seen NiMH packs or Alkaline packs blindly replacing NiCd Packs before), again, you need to understand what you are doing.

?

?

Relocating the pack, packaging it, isolating the lead wires and doing the other provisions mentioned in the original post and other response posted are really good ideas.

?

?

Ross

?

?

?
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3b.?
Re: A Caution- leaking and fuming batteries
From: si_emi_01
Date: Mon, 11 Nov 2024 23:50:20 CET
?

Oh, and a sad tear for the damaged Watkins Johnson Receiver. Very good equipment.

?

I used a few WJ-8999s and worked on one to repair it, too. Now, that is a very packed receiver. Both boxes are really packed with little room to spare.

?

?

Ross

?

?
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4a.?
Re: HP 3586 counter reading high
From: paulswed
Date: Mon, 11 Nov 2024 23:56:28 CET


Quite sometime ago maybe 10 years a Ham in Canada did indeed make a BFO replacement that was synthesized. I built up a unit and it worked very well. I suspect I might have the details around still.
The link still exists
So there you go.
Paul
WB8TSL
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4b.?
Re: HP 3586 counter reading high
From: John Ackermann N8UR
Date: Tue, 12 Nov 2024 00:36:49 CET

Thanks for that, Paul! I may just do some retro-fitting.
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4c.?
Re: HP 3586 counter reading high
From: Burt K6OQK
Date: Tue, 12 Nov 2024 01:47:51 CET

There are two crystals that provide the injection, or carrier, for the upper and lower sideband product detectors, and as I recall, the 1800 Hz tone is a function of the product detector/s, . They are not used for any of the conversions. The conversion oscillators are derived from the time base, which is a separate crystal oscillator. Do you have the "Precision Oscillator" in your unit?

I was going to suggest that you try using an external reference input to your 3586B to see if that resolves your problem. It's possible that the internal reference may be off frequency. I don't have my 3586 book in front of me, so I don't off hand recall which board the standard internal reference is located.

Burt, K6OQK

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
biwa@...
K6OQK



--
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, CA 91201 U.S.A.
K6OQK
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4d.?
Re: HP 3586 counter reading high
From: Bill Riches
Date: Tue, 12 Nov 2024 02:16:20 CET


?
Hi Burt,
?
It has the 004 time base however I have all of the gear synced to gps.??
?
Using the 3586 as a sig gen - tuned frequency on front display matches the output sig on the back panel.
?
When inputting a frequency to the unit's front panel, the units fx readout is around 20 hz high.
?
I have several of 3586s around the shop - that I have not worked on as yet.? The third one I opened up I pulled out the A22 board and it worked fine.??
?
Now to play around with trouble shooting the A22 board!?
?
Check out my QRZ page!
?
73,
?
Bill Riches, WA2DVU
Cape May, NJ
?
73,
?
?
?
On Monday, November 11, 2024 at 07:47:55 PM EST, Burt K6OQK <biwa@...> wrote:
?
?
There are? two crystals that provide the injection, or carrier, for
the upper and lower sideband product detectors, and as I recall, the
1800 Hz tone is a function of the product detector/s, . They are not
used for any of the conversions.? The conversion oscillators are
derived from the time base, which is a separate crystal
oscillator.? Do you have the "Precision Oscillator" in your unit?
?
I was going to suggest that you try using an external reference input
to your 3586B to see if that resolves your problem.? It's possible
that the internal reference may be off frequency. I don't have my
3586 book in front of me, so I don't off hand recall which board the
standard internal reference is located.
?
Burt, K6OQK
?
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
K6OQK
?
?
?
--
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, CA 91201 U.S.A.
K6OQK
?
?
?
?
?
Attachments:
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5a.?
Can an 8444A be used with an 8569B?
From: James55
Date: Tue, 12 Nov 2024 03:04:28 CET


?Hello everyone.?

?I have an 8569B and was wondering if the HP 8444A tracking gen can be used with it??
?
?Only asking as have found no info online.

?Thanks in advance


?James
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6a.?
Re: Another dead 8753D YTO
From: Scott Vance
Date: Tue, 12 Nov 2024 04:05:45 CET


Marcus-
Fascinating and wonderful solution.? I still have a few questions for you or anyone else who cares to answer.? Please forgive my ignorance:
?
1)? The YIG listed on your original link is an Avantek ASF-8347M.? The picture shows something that is 4-8 GHz.? First of all, what do all of those part numbers mean?? I was looking on ebay and I'm seeing a fair number of Avantek YIGs that are 4-8 GHz, but they have numbers like S09-1358 or SF6-0997M.? So my questions:
? a)? Do you need to start with an ASF-8347M, or do the other 4-8 GHz models work in the same way?
? b)? The VNA goes from basically 0-6 GHz.? Why does the YIG go from 4-8 GHz?
? c)? Could one use a YIG with a larger range, such as 2-8 GHz instead?? Would the cal proceedure adjust the instrument so that it just didn't use part of the range?? For instance, S080-0686 or Y084-1215 seem to be available.? Are there drawbacks to this approach, such as reduced frequency stability?
? d)? The origional HP part appears to be 5086-7834 and appears to go from 3.8-7 GHz.? From this perspective the 4-8 GHz replacement kind of makes sense, but does the lack of ability to function at 3.8 give you any issues?
? e)? Are the first two digits of the part the production year?? I'm seeing a lot of 080, 83, 84, etc., in these numbers which looks to me like parts coming from the early 1980s.
?
Very cool that there are people here smarter than me who have figured out how to make this work.? I looks like the original replacement parts (5086-7834) run around $800 USD, whereas these replacements are sometimes sub $100.
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Re: Can an 8444A be used with an 8569B?

 

Hi,

Effectively, you need option 059, or a stable external source at 500 MHz.
Obviously, the band stops at the limit of the 8444A and not that of the
8569B, max 1500 MHz.

As for the 0-10V sweep voltage, this has no effect on the 8444A as it has no
input for this signal.
This is not a ramp that synchronizes and controls the output frequency of
the 8444A, but rather the RF source of the first LO of the 8569B (2060-3550
MHZ) mixed with the sum of the source at 500MHz and the cavity oscillator at
1550 MHz (total 2050 MHz) which will give the output of the tracking
generator 8444A, 10MHz to 1500 MHz at the input of the 8569B.
In manual scan mode, the 8444A provides a 0-10V voltage at the output of the
SCAN OUT connector which will go to the SCAN INPUT connector of the Spectrum
(EXT SWEEP for the 8569B), and the 8444A will receive the frequency of the
first LO corresponding to the chosen voltage.

But I am intrigued by the information about the 8444A and 8566A talking
about this, I will try to find it, but if you had the volume number and page
it would be faster for me.

Yves

-----Message d'origine-----
De?: [email protected]
<[email protected]> De la part de Don Bitters via
groups.io
·¡²Ô±¹´Ç²â¨¦?: 12 novembre 2024 00:52
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] Can an 8444A be used with an
8569B?

It might be possible, but would involve several issues. The 8444A was
designed to be used with an 8554A/L, 8555A, and later an 8558A, and later
still with and 8568A/B. Does the 8444A have the internal 500MHz oscillator
option - options 058 or 059, if not you would have to supply an external
500MHz stable @10dBm or higher. IIRCC, the expected sweep voltage is 0 to
+10V, the 8569B does have an external sweep ramp that I believe is also 0 to
+10V, but the sweep ramp linearity may not match exactly, in which case you
would need to make a sweep offset/gain matching circuit (as described in the
8566A OP/Serv manual, under alignment tools). The track gen sweep range will
very much depend on the low band sweep of the 8569B - probably 10MHz -
1.3GHz, or 1.55GHz max. The low band on the 8569B is 10MHz to 1.8GHz in
full band sweep - the 8444A cannot go that high, so you cannot use full band
sweep, but can set the 8569B to sweep from 10MHz to 1.5GHz in the MHz per
div sweep mode. An external sweep trigger is required to sync the sweep,
this should come from the 8569B.
Don Bitters

HP8444A.png

Re: Can an 8444A be used with an 8569B?

 

It might be possible, but would involve several issues. The 8444A was designed to be used with an 8554A/L, 8555A, and later an 8558A, and later still with and 8568A/B. Does the 8444A have the internal 500MHz oscillator option - options 058 or 059, if not you would have to supply an external 500MHz stable @10dBm or higher. IIRCC, the expected sweep voltage is 0 to +10V, the 8569B does have an external sweep ramp that I believe is also 0 to +10V, but the sweep ramp linearity may not match exactly, in which case you would need to make a sweep offset/gain matching circuit (as described in the 8566A OP/Serv manual, under alignment tools). The track gen sweep range will very much depend on the low band sweep of the 8569B - probably 10MHz - 1.3GHz, or 1.55GHz max. The low band on the 8569B is 10MHz to 1.8GHz in full band sweep - the 8444A cannot go that high, so you cannot use full band sweep, but can set the 8569B to sweep from 10MHz to 1.5GHz in the MHz per div sweep mode. An external sweep trigger is required to sync the sweep, this should come from the 8569B.
Don Bitters
Re: Fitting rack ears to ageing HP equipment

 

Good work! You can ¡°store¡± the removed trim wrapped in wax paper to reduce the chances of it sticking to anything and everything. Some day you or someone else may want one of those.?

Jeremy?


On Mon, Nov 11, 2024 at 7:16?PM Tim Barrett K9VB via <timbarrett=[email protected]> wrote:

Thanks all for the advice which gave me the encouragement to persist. In the end a combination of heat and a very thin bladed screwdriver did the trick. My next step was to use acetone but I didn't have any in the house and in the event it was not needed. As always even a cosmetic addition to a piece of HP gear was built like a tank!
?
Tim K9VB
Re: Can an 8444A be used with an 8569B?

 

¿ªÔÆÌåÓý

Hi James,

?

You have the first LO output on the back panel of your 8569B, but you need the 059 option for the 8444A which is a 500 MHz internal source to the 8444A. The first IF of the 8569B is 2050MHz, making it compatible.

?

I already owned an 8569B and had out of curiosity tested the 8444A opt 059 and from memory, it worked very well. But since I already had a VNA, I didn't really need this 8444A opt 059, which I sold along with my 8569B.

?

Yves

De?: [email protected] <[email protected]> De la part de James55 via groups.io
·¡²Ô±¹´Ç²â¨¦?: 11 novembre 2024 19:53
??: [email protected]
Objet?: [HP-Agilent-Keysight-equipment] Can an 8444A be used with an 8569B?

?

?Hello everyone.?

?I have an 8569B and was wondering if the HP 8444A tracking gen can be used with it??
?
?Only asking as have found no info online.

?Thanks in advance


?James
Re: Application and Service Notes on HPWiki - Update

 

¿ªÔÆÌåÓý

Thank You, amazing.

?

Fra: [email protected] <[email protected]> P? vegne af Wolfgang Schraml via groups.io
Sendt: 11. november 2024 13:06
Til: [email protected]
Emne: Re: [HP-Agilent-Keysight-equipment] Application and Service Notes on HPWiki - Update

?

Hello,

?

It's been a while since I provided a status update on the ongoing Applications and Service Notes project.

?

Application Notes:

There are close to 2,400 now. I pretty much exhausted all known (to me) online archives to collect more.

?

Service Notes:

After another sync with Keysight's repository over the weekend, HPWiki has almost 5,800 notes now.

?

Please contact me if you have any documents that haven't been published yet (especially service notes for older HP equipment). I am sure there are vast, untapped archives in someone's basement.

?

Best regards,

Wolfgang Schraml

KI7PFX
Re: Application and Service Notes on HPWiki - Update

 

¿ªÔÆÌåÓý

Vielen Dank, Wolfgang!

Wow!

--MfG
Tom
-- 
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070


On 11/11/2024 4:06 AM, Wolfgang Schraml via groups.io wrote:

Hello,

?

It's been a while since I provided a status update on the ongoing Applications and Service Notes project.

?

Application Notes:

There are close to 2,400 now. I pretty much exhausted all known (to me) online archives to collect more.

?

Service Notes:

After another sync with Keysight's repository over the weekend, HPWiki has almost 5,800 notes now.

?

Please contact me if you have any documents that haven't been published yet (especially service notes for older HP equipment). I am sure there are vast, untapped archives in someone's basement.

?

Best regards,

Wolfgang Schraml

KI7PFX
Re: HP instrument sticky case panel surface

 

¿ªÔÆÌåÓý

The sticky stuff is likely plasticizer that has separated from the vinyl coating on the panels. I have had good success using denatured alcohol and a rag to scrub? off the residue.

?? Bruce Gentry, KA2IVY

On 11/11/24 22:50, Calvin Guan via groups.io wrote:

Hi,
I have a HP8515a that developed sticky surfaces on the top and bottom panels. It feels like leftover glue. I try to clean it with light soap water or gluegone but it doesn't seem to work at all.
?
What causes it and how to I clean it?
?
Regards,
Calvin
Re: Application and Service Notes on HPWiki - Update

 

On 11/11/24 07:06, Wolfgang Schraml via groups.io wrote:
It's been a while since I provided a status update on the ongoing Applications and Service Notes project.
Application Notes:
<>
There are close to 2,400 now. I pretty much exhausted all known (to me) online archives to collect more.
Service Notes:
<>
After another sync with Keysight's repository over the weekend, HPWiki has almost 5,800 notes now.
Please contact me if you have any documents that haven't been published yet (especially service notes for older HP equipment). I am sure there are vast, untapped archives in someone's basement.
Amazing work as always, Wolfgang.

Remember, HPWiki is accessible via the hpwiki.org domain as well.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
HP instrument sticky case panel surface

 

Hi,
I have a HP8515a that developed sticky surfaces on the top and bottom panels. It feels like leftover glue. I try to clean it with light soap water or gluegone but it doesn't seem to work at all.
?
What causes it and how to I clean it?
?
Regards,
Calvin
Re: Fitting rack ears to ageing HP equipment

 

Thanks all for the advice which gave me the encouragement to persist. In the end a combination of heat and a very thin bladed screwdriver did the trick. My next step was to use acetone but I didn't have any in the house and in the event it was not needed. As always even a cosmetic addition to a piece of HP gear was built like a tank!
?
Tim K9VB
Re: Another dead 8753D YTO

 

Marcus-
Fascinating and wonderful solution.? I still have a few questions for you or anyone else who cares to answer.? Please forgive my ignorance:
?
1)? The YIG listed on your original link is an Avantek ASF-8347M.? The picture shows something that is 4-8 GHz.? First of all, what do all of those part numbers mean?? I was looking on ebay and I'm seeing a fair number of Avantek YIGs that are 4-8 GHz, but they have numbers like S09-1358 or SF6-0997M.? So my questions:
? a)? Do you need to start with an ASF-8347M, or do the other 4-8 GHz models work in the same way?
? b)? The VNA goes from basically 0-6 GHz.? Why does the YIG go from 4-8 GHz?
? c)? Could one use a YIG with a larger range, such as 2-8 GHz instead?? Would the cal proceedure adjust the instrument so that it just didn't use part of the range?? For instance, S080-0686 or Y084-1215 seem to be available.? Are there drawbacks to this approach, such as reduced frequency stability?
? d)? The origional HP part appears to be 5086-7834 and appears to go from 3.8-7 GHz.? From this perspective the 4-8 GHz replacement kind of makes sense, but does the lack of ability to function at 3.8 give you any issues?
? e)? Are the first two digits of the part the production year?? I'm seeing a lot of 080, 83, 84, etc., in these numbers which looks to me like parts coming from the early 1980s.
?
Very cool that there are people here smarter than me who have figured out how to make this work.? I looks like the original replacement parts (5086-7834) run around $800 USD, whereas these replacements are sometimes sub $100.
Can an 8444A be used with an 8569B?

 

?Hello everyone.?

?I have an 8569B and was wondering if the HP 8444A tracking gen can be used with it??
?
?Only asking as have found no info online.

?Thanks in advance


?James
Re: HP 3586 counter reading high

 

Hi Burt,

It has the 004 time base however I have all of the gear synced to gps.??

Using the 3586 as a sig gen - tuned frequency on front display matches the output sig on the back panel.

When inputting a frequency to the unit's front panel, the units fx readout is around 20 hz high.

I have several of 3586s around the shop - that I have not worked on as yet.? The third one I opened up I pulled out the A22 board and it worked fine.??

Now to play around with trouble shooting the A22 board!?

Check out my QRZ page!

73,

Bill Riches, WA2DVU
Cape May, NJ

73,

?

On Monday, November 11, 2024 at 07:47:55 PM EST, Burt K6OQK <biwa@...> wrote:


There are? two crystals that provide the injection, or carrier, for
the upper and lower sideband product detectors, and as I recall, the
1800 Hz tone is a function of the product detector/s, . They are not
used for any of the conversions.? The conversion oscillators are
derived from the time base, which is a separate crystal
oscillator.? Do you have the "Precision Oscillator" in your unit?

I was going to suggest that you try using an external reference input
to your 3586B to see if that resolves your problem.? It's possible
that the internal reference may be off frequency. I don't have my
3586 book in front of me, so I don't off hand recall which board the
standard internal reference is located.

Burt, K6OQK

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
K6OQK



--
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, CA 91201 U.S.A.
K6OQK





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