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Re: Low Cost Test Equipment

 

For sure, but what Roy said is spot-on....especially his last sentence.....
FS: manuals HP 333/334, HP 8405 (reduced)

 

I'm offering FS the following HP instrument manuals:

333A/334A distortion analyzer prefix 1101A (for 333A) and? 1137A (for 334A)
--? Includes Supplement A yellow sheet for 00333-90005 in near-find cond.



8405A vector voltmeter operating and service manual missing sections 1 through 3.
Text begins at section 4 (principles of operation), through appendix I and appears
complete. Includes yellow sheets 08405-90024; the manual is marked "1144A-05388".

Asking $16.00 for the lot which includes USPS media-mail shipment.

PayPal honored, questions welcomed.

73--

Brad? AA1IP
Re: HP 5344A Source Synchronizer - FM output fuse spec?

 

Hi Tony. Contact me off list - I'll send you one.
73,
Bo Lowrey
WB4GZK
Re: Low Cost Test Equipment

 

On 1/3/22 2:14 PM, Roy Thistle wrote:
Hi Jerry:
I don't follow the Drake and Hallicrafters groups.io groups. (Those rigs were worth the effort before they became a fetish for non-technical hams... akin to Fluke anything... including hi-priced Fluke beer mugs.)
Just the same... if someone was complaining about "affordable test equipment" ... on this list... it probably wasn't about high priced junk... but, more likely about the high cost speculators are charging for HP gear. IMO, I wouldn't say I wouldn't buy a "nanoVNA", particularly if I wanted to pretend I was doing something 'meaningful' with it... and just have some fun.
Anyway, I think I'll stick to occasionally?paying too much for something, someone fished out of a dumpster (and perhaps dragged behind their truck too)... and hope to 'fix' it... so I can have something I can actually used to do some 'work.'
I'm pretty sure that post was spam, Roy.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: HP11758B Digital Radio Test Set

 

On 1/3/22 2:12 PM, Stuart Landau via groups.io wrote:
I see many defective HP sensors, listed at high prices, as parts units. I wonder if anyone actually buys them and thinks that they will repair them?
Several companies repair them; this is probably where their repaired units stream starts.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Low Cost Test Equipment

 

Hi Jerry:
I don't follow the Drake and Hallicrafters groups.io groups. (Those rigs were worth the effort before they became a fetish for non-technical hams... akin to Fluke anything... including hi-priced Fluke beer mugs.)
Just the same... if someone was complaining about?"affordable test equipment" ... on this list... it probably wasn't about high priced junk... but, more likely about the high cost speculators are charging for HP gear. IMO, I wouldn't say I wouldn't buy a "nanoVNA", particularly if I wanted to pretend I was doing something 'meaningful' with it... and just have some fun.
Anyway, I think I'll stick to occasionally?paying too much for something, someone fished out of a dumpster (and perhaps dragged behind their truck too)... and hope to 'fix' it... so I can have something I can actually used to do some 'work.'
Best regards and wishes.
Roy
Re: HP11758B Digital Radio Test Set

 

Most HP power sensors are made with magic "pixi dust", hence their high price. I have three HP 8484A sensors (10 MHz to 18 GHz, -70 to -20 dBm). Normally they are used with an attenuator because the maximum accurate input power level is -20 dBm. For calibration purposes they were sold with an HP 11708A 30 dB 50 MHz calibration attenuator. With my other well calibrated attenuators, I can accurately measure up to 1000 watts, using a calibrated 80 dB of attenuation.

The maximum safe power into this diode sensor is 200 mW (+23dBm) which is 43 dB above the useful input level. Most other HP sensors use a thermocouple and easily fail when the input power is just above the maximum rated power. I assume that to replace the thermocouple element is a very special procedure and may require some exact RF adjustments. For my purposes, the HP 8484A is more accurate than I need.

I see many defective HP sensors, listed at high prices, as parts units. I wonder if anyone actually buys them and thinks that they will repair them?

Stuart K6YAZ
Los Angeles, California
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

--

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

--

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

--

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

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