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Re: HP 5344A Source Synchronizer - FM output fuse spec?

 


Thanks George for that great tip - just managed to snag one of theMarconi fuse unit on eBay. :-)

Regards

Tony

On Mon, 3 Jan 2022 at 19:02, george edmonds via <G6HIG=[email protected]> wrote:
Hi Tony

The Littlefuse type is 3AG 1/16A.? They are available on eBay.com if you are in the USA, if you are in the UK look up an eBay.co,uk Listing for a Marconi TM 9884 BNC in line fuse unit. they come with five spare fuses.

73 George G6HIG DOVER UK

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Re: HP 5344A Source Synchronizer - FM output fuse spec?

 

Hi Tony

The Littlefuse type is 3AG 1/16A.? They are available on eBay.com if you are in the USA, if you are in the UK look up an eBay.co,uk Listing for a Marconi TM 9884 BNC in line fuse unit. they come with five spare fuses.

73 George G6HIG DOVER UK
Re: HP 8601A 100 kHz to 110 MHz Generator / Sweeper

 

But what I cannot say - I don't yet have a 8601A in-hand - is if the A14 board is OPT 007 exclusively or if is only configured differently for non-OPT 007 models.
Re: HP 5344A Source Synchronizer - FM output fuse spec?

 

Cannot quite believe these fuses are ?10 each on RS/Mouser/eBay!?

On Mon, 3 Jan 2022 at 18:16, george edmonds via <G6HIG=[email protected]> wrote:
Hi

Now all you have to do is to find a working spare fuse, they go open on their own with time, at least the Littlefuse ones do.

73 George G5HIG UK

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Re: HP 5344A Source Synchronizer - FM output fuse spec?

 

Hi

Now all you have to do is to find a working spare fuse, they go open on their own with time, at least the Littlefuse ones do.

73 George G5HIG UK
Re: Just wanted to point out that the HP3851A is pretty cool after all these years..

 

Isn't that what an inexpensive BMS is for?? I know...not nearly as much fun.
Re: HP 5344A Source Synchronizer - FM output fuse spec?

 


Thanks Jens,

So the one in there already is the correct rating. Need to work out why it has blown now.

You help Much appreciated

Tony

On Mon, 3 Jan 2022 at 16:45, jemotrain via <jemotrain=[email protected]> wrote:

ArtekMedia has a good quality scan available.


From the service manual: Chapter 6:

A6F1 FUSE .062A 250V NTD 1.25x.25 UL 2110-0011


?

So it should be rated with 62mA.

?

Best regards,

Jens

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Re: HP 5344A Source Synchronizer - FM output fuse spec?

 

¿ªÔÆÌåÓý

Sounds like it is the right one at 62mA = 1/16A approx..

by banging a nail into a piece of wood...

On 3 Jan 2022, at 16:45, jemotrain via <jemotrain@...> wrote:

ArtekMedia has a good quality scan available.


From the service manual: Chapter 6:

A6F1 FUSE .062A 250V NTD 1.25x.25 UL 2110-0011


?

So it should be rated with 62mA.

?

Best regards,

Jens

Re: HP 5344A Source Synchronizer - FM output fuse spec?

 

ArtekMedia has a good quality scan available.


From the service manual: Chapter 6:

A6F1 FUSE .062A 250V NTD 1.25x.25 UL 2110-0011


?

So it should be rated with 62mA.

?

Best regards,

Jens

Re: HP 5344A Source Synchronizer - FM output fuse spec?

 

Hi Nigel,

It is stamped - it says "312 1/16A 250V". The problem is I don't know if the right one was used or and whether 1/16A is the correct value.

Tony
Re: HP 8601A 100 kHz to 110 MHz Generator / Sweeper

 

I would assume, by looking at a digital copy of the 8601A service manual that two panel BNC to SMB cables mount to the plugs on the rear panel, then connect to VTO (J13) and LO input (J12), Fig 8-37 board A14, schematic 13 on page 8-33.

Seems straightforward enough, but I don't believe I have the cable-pair on hand. And I wouldn't want to do the modification like this one:

https://www.ebay.com/itm/255230575556?epid=1721885693&hash=item3b6ced83c4:g:IyYAAOSw7GhemVxK
Low Cost Test Equipment

 

Hello fellow DRAKE, Hallicrafters & Agilent-HP? groups.io ? contributors.
I? recently noteda similar theme in all 3 groups : "affordable test equipment" .
I'm sharing a few resources I've found quite helpful.

?
Recently I did some self-gifting and ordered a few more Amazon finds & will review upon receipt .

* Oscilloscope : $90
USB Oscilloscope OSC482M for Both Android Phone/Tablet & Windows PC.
2 Channels, 50M S/s, 20MHz (Bandwidth), 8~13 bit Vertical Resolution
Sold by: Loto Instruments

* Function generator : $30
1HZ-500KHZ DDS Functional Signal Generator, Seesii DDS Function ,
Low Frequency Signal Generator Sine/Triangle/Square/Sawtooth .
Sold by: HUAIFANGPING

* LNA : $11
HiLetgo 0.1-2000MHz RF WideBand Amplifier 30dB High Gain Low Noise LNA Amplifier


?
* $90 Tiny SA ( Spectrum analyzer)
Have it & works splendid .
?
?

* $14 Freq Counter
gazechimp PLJ-6LED-H Signal Frequency Counter Meter Test Module 1~1000MHz LED 3 Color - Red
Have it & works splendid .
?

* $30 Simple RF Signal Generator Frequency 35MHz-4400MHz Signal Source,
Have it & works splendid , though close-in sideband noise is just middling? .
?
?

%% More guidance on affordable test equipment, from trusted colleagues
in Automotive Industry & IEEE EMC Society .
Although ElectroMagnetic Compatibility may not be the problem you are trying to solve,,
the trouble-shooting & analysis techniques to find the basic - root mechanisms are quite applicable .
?

## Arnie Nielson "Low-Cost Instruments and Procedures to Troubleshoot EMC Issues"
NanoVNA *, SDRplay*, (RF) signal amplifier - NWDZ-RF-P, TinySA*, DIY TEM cell,
DIY bulk current injection probe*, ESD- piezoelectric barbecue lighter*
[[ * = items in Jerry JDM LABS / WA9FIY shop ]]
?

## Ken Wyatt, WA6TTY
Some duplication with Arnie Nielson list & techniques. There are 3 books in the series .
?

Happy New Year & wishing you all rapid repairs !

73 & Best Regards,
Jerry Meyerhoff / WA9FIY [ since 1963]
JDM LABS LLC

1/3/2022
Re: HP 5344A Source Synchronizer - FM output fuse spec?

 

¿ªÔÆÌåÓý

Usually the fuse value is stamped into the end cap.

by banging a nail into a piece of wood...

On 3 Jan 2022, at 15:56, Tony Cox <tonycox01@...> wrote:

Hi,

Happy New Year to you.

I have an HP 5344S source synchronizer that has stopped working with an Err5 message. One of the trouble shooting hints is to check the FM OUT fuse on the Main Loop board (A6 - picture attached) and this has indeed blown. Not sure why - yet. However the online service manual is very poor scan quality and I can't see the spec for the fuse to be able to replace it.

Does anybody happen to know what the rating of the FM OUT fuse on A6 ought to be?

thanks a lot for your help

Tony

<2022-01-03_15-33-17_996.jpeg>
HP 5344A Source Synchronizer - FM output fuse spec?

 

Hi,

Happy New Year to you.

I have an HP 5344S source synchronizer that has stopped working with an Err5 message. One of the trouble shooting hints is to check the FM OUT fuse on the Main Loop board (A6 - picture attached) and this has indeed blown. Not sure why - yet. However the online service manual is very poor scan quality and I can't see the spec for the fuse to be able to replace it.

Does anybody happen to know what the rating of the FM OUT fuse on A6 ought to be?

thanks a lot for your help

Tony

2022-01-03_15-33-17_996.jpeg

Re: HP11758B Digital Radio Test Set

 

Yes, the devices are sensitive and not limited to the power sensors, it was drilled into me with spectrum analyzers too.? Knowing not just the peak power going in but the full spectrum power.? Generally, not an issue with single sources but when dealing with CATV feeds, that can cook a detector pretty easily.? ? ?But that is how we learn, sometimes, the hard way.

Didn't know the power sensors are not fixable.? Is there a reason?
David
VE6RKT
Re: Dead 54720D

 

Hi

Did you have any success with that eeprom hacking ? Im faceing same issue now. I have 54720A unit with lost mainframe calibration. It's crazy difficult to get this calibration plugin. I also have 54712A plugin, i will try to get programmer in next couple of days and do some comparation between those plugins binaries. Please let me know if you have any hints/ideas.?
Re: YTO from 8595E in 8561E

 

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Hello there are you able to choose frequencies above 2.9Ghz otherwise it may have forgotten that it is a HP8561E and thinks it is a 8560E. Other problems might be the Switch that alter the input signal to the low and high band mixer section. I think that happens internally in the YIG tuned Filter. There should be a switch signal. Chack if the voltages changes on the pins for switch.
If you get no error like ERR334 or ERR301 the YTO loops should be ok.
best regards Peter OZ1LPR
Fra: [email protected] <[email protected]> p? vegne af Roman Luschik <romal76@...>
Sendt: 2. januar 2022 16:39
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] YTO from 8595E in 8561E
?
Hello!

I was place 5086-7903 YIG into my 8561E instead of bad 5086-7906 and made YTO adjustment procedures from service manual.
There is no errors after reboot, but I can see signals till 2.89GHz only.
Can anoyone tell me please what is wrong?

Best regards,
Roman.

Just wanted to point out that the HP3851A is pretty cool after all these years..

 

I am testing a battery protector for LiFePO4. It measures individual cell voltages from a stack of four cells and cuts out if any of the cells fall under or goes over a preset value. The 44702 + 44711 lets me measure all cell voltages and the voltage over the shunt over time when testing charging and discharging. Data is sent over GPIB to Excel.

If anyone has one of these, then I have some collected program snippets here:?http://www.dalton.ax/hp3852A/
Re: 3325A Function Gen, where is the RMP test jumper?

 

Nope, apologies, it's a Rev C board - I was mistakenly looking at the attenuator board silkscreen.

Tony


On Mon, 3 Jan 2022 at 10:09, Tony Cox via <tonycox01=[email protected]> wrote:
Jared,

Attached is a picture of my Rev B A14 board.





Regards

Tony



On Mon, 3 Jan 2022 at 09:31, Jared Cabot via <jaredcabot=[email protected]> wrote:

Alrighty, I dug things out and opened it all up. Here is what I have.

Two 3325A with the following serial prefixes:
2512Axxxxx
2512Axxxxx
I also have a third spare A14 board but it is the same revision with no jumpers too.
All are Rev C A14 boards with no jumpers I can see around U34, unfortunately I haven't come across a different version of the A14 board yet.

My manual is 03325-90002, I wonder if there is either an earlier than the afore mentioned 90001 manual or a later one than my 90002 (assuming the numbering is in chronological order etc) that omits the RMP/jumper instruction?

Here are pictures of the three A14 boards I have:




It seems there must be a few revisions of this board with varying amounts of jumpers?

If anyone else can take photos of their A14 boards that are different to my pictures above and also the revision number and serial prefix, it might help narrow down these variants and the adjustment instructions.


Thanks!
Jared

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Re: 3325A Function Gen, where is the RMP test jumper?

 

Jared,

Attached is a picture of my Rev B A14 board.





Regards

Tony



On Mon, 3 Jan 2022 at 09:31, Jared Cabot via <jaredcabot=[email protected]> wrote:

Alrighty, I dug things out and opened it all up. Here is what I have.

Two 3325A with the following serial prefixes:
2512Axxxxx
2512Axxxxx
I also have a third spare A14 board but it is the same revision with no jumpers too.
All are Rev C A14 boards with no jumpers I can see around U34, unfortunately I haven't come across a different version of the A14 board yet.

My manual is 03325-90002, I wonder if there is either an earlier than the afore mentioned 90001 manual or a later one than my 90002 (assuming the numbering is in chronological order etc) that omits the RMP/jumper instruction?

Here are pictures of the three A14 boards I have:




It seems there must be a few revisions of this board with varying amounts of jumpers?

If anyone else can take photos of their A14 boards that are different to my pictures above and also the revision number and serial prefix, it might help narrow down these variants and the adjustment instructions.


Thanks!
Jared

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