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Re: CRT Needed for HP 54520A Scope

Mark Gulbrandsen
 

I meant to say 54520! Apparently that range of HP scopes all use the same CRT. I have a 54520 here that I use occasionally....

Mark
On Mar 9, 2013, at 7:20 AM, Mark Gulbrandsen <cinerama84106@...> wrote:

There is a CRT distributor on ebay called "newtubes" that has New 54502 crt's They show one listed that fits your scope and is $195.00.. Also looks to be a normally stocked tube for them. I hope this helps...

Mark Gulbrandsen
Salt Lake City

Sent from my iPad

On Mar 9, 2013, at 6:48 AM, "danaz.chandler" <djn@...> wrote:

Thanks for the idea. I may try to rejuv the. However, my main complaint is the deep burn the glass shows..

Dan in Chandler,AZ
=============================

--- In hp_agilent_equipment@..., Chin Siang Lim <cslim388@...> wrote:

Hi Dan,
If you are prepared to throw those CRTs away, why not try rejuvenating them?
See www.ke5fx.com/crt.html
www.thegleam.com/ke5fx/crt/sencore.pdf

And use some ideas from here :



cslim
On Sat, Mar 9, 2013 at 6:12 AM, danaz.chandler <djn@...> wrote:



Hi gang...I need to replace the CRT in two or three HP 54520A scopes.
While the one's installed work, they are very well burnt and getting dim.

The tube is an HP 2090-0324 Hitachi Mizusawa J260194 9" P31 Green phosphor
tube.

If any one has a boneyard scope with a good CRT, I could use a few. Also,
can use the trim strip that holds the case to the front bezel.

Question: Would most 9" CRT's work with the existing video board?

Any help or thoughts appreciated.

Dan in Chandler AZ

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







[Non-text portions of this message have been removed]
Re: CRT Needed for HP 54520A Scope

Mark Gulbrandsen
 

There is a CRT distributor on ebay called "newtubes" that has New 54502 crt's They show one listed that fits your scope and is $195.00.. Also looks to be a normally stocked tube for them. I hope this helps...

Mark Gulbrandsen
Salt Lake City
On Mar 9, 2013, at 6:48 AM, "danaz.chandler" <djn@...> wrote:

Thanks for the idea. I may try to rejuv the. However, my main complaint is the deep burn the glass shows..

Dan in Chandler,AZ
=============================

--- In hp_agilent_equipment@..., Chin Siang Lim <cslim388@...> wrote:

Hi Dan,
If you are prepared to throw those CRTs away, why not try rejuvenating them?
See www.ke5fx.com/crt.html
www.thegleam.com/ke5fx/crt/sencore.pdf

And use some ideas from here :



cslim
On Sat, Mar 9, 2013 at 6:12 AM, danaz.chandler <djn@...> wrote:



Hi gang...I need to replace the CRT in two or three HP 54520A scopes.
While the one's installed work, they are very well burnt and getting dim.

The tube is an HP 2090-0324 Hitachi Mizusawa J260194 9" P31 Green phosphor
tube.

If any one has a boneyard scope with a good CRT, I could use a few. Also,
can use the trim strip that holds the case to the front bezel.

Question: Would most 9" CRT's work with the existing video board?

Any help or thoughts appreciated.

Dan in Chandler AZ

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



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

[Non-text portions of this message have been removed]
Re: CRT Needed for HP 54520A Scope

 

Thanks for the idea. I may try to rejuv the. However, my main complaint is the deep burn the glass shows..

Dan in Chandler,AZ
=============================

--- In hp_agilent_equipment@..., Chin Siang Lim <cslim388@...> wrote:

Hi Dan,
If you are prepared to throw those CRTs away, why not try rejuvenating them?
See www.ke5fx.com/crt.html
www.thegleam.com/ke5fx/crt/sencore.pdf

And use some ideas from here :



cslim
On Sat, Mar 9, 2013 at 6:12 AM, danaz.chandler <djn@...> wrote:



Hi gang...I need to replace the CRT in two or three HP 54520A scopes.
While the one's installed work, they are very well burnt and getting dim.

The tube is an HP 2090-0324 Hitachi Mizusawa J260194 9" P31 Green phosphor
tube.

If any one has a boneyard scope with a good CRT, I could use a few. Also,
can use the trim strip that holds the case to the front bezel.

Question: Would most 9" CRT's work with the existing video board?

Any help or thoughts appreciated.

Dan in Chandler AZ

=====================================================
HP 8620C with 86222B-H69 rf plug in ( with a US serial number )

 

I have a old HP8620b with rf 86222B-H29 plug in probably made specially for the defence at that time . The output that is not leveled i would like to find the service manual or a place where i could find it , unless somebody has experience with the unit.( It appear also that when you want to plug another rf plug in it is not compatible even with a adapter probably because it was made specially ??) the US serial is 6625-01-036 3730 )

thank you
Re: Lamps and Mains Lead for HP412A?

 

I have an HP411 which is an RF power meter with the same clock work motor and photo interrupter setup as I suspect the 412 has. I got replacement bulbs from a place on the Internet called Bulbtown. You might Google the name but they had all kinds of type 47 bulbs and the type that are used in the HP stuff. They even had the blue tinted bulbs used in my old Drake 4 line ham transciever.

Bob
N2CBH

--- In hp_agilent_equipment@..., "Mike Millen" <mike.millen.uk@...> wrote:

Thanks for the tip, Cliff.

They're not exactly like the HP ones, but they may well suffice... certainly worth a try at 36p each!

73,
Mike
M0MLM


----- Original Message -----
From: Cliff Barber
To: hp_agilent_equipment@...
Sent: Friday, March 08, 2013 2:35 PM
Subject: Re: [hp_agilent_equipment] Re: Lamps and Mains Lead for HP412A?



Hi,
I wonder if Ebay item 360327851354 might be suitable.
I had a similar requirement a few weeks ago, but managed to find something from my "junk-box"
Cliff
G4BGP

----- Original Message -----
From: mike
To: hp_agilent_equipment@...
Sent: Friday, March 08, 2013 1:41 PM
Subject: [hp_agilent_equipment] Re: Lamps and Mains Lead for HP412A?

Hi Dave,

Neither, I'm afraid, but the halogen is closest, physically.

It's a 6.3v, 0.15A lamp with 4mm pin pitch.

Mike

--- In hp_agilent_equipment@..., "David C. Partridge" <david.partridge@> wrote:
>
> G4 (bi-pin halogen) or G4-1/2 (miniature Edison Screw, also known as E10)? If the latter both digikey and mouser stock some
>
> Dave
> -----Original Message-----
> From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of mike
> Sent: 08 March 2013 08:15
> To: hp_agilent_equipment@...
> Subject: [hp_agilent_equipment] Lamps and Mains Lead for HP412A?
>
> I've just acquired an HP412A & would like to find some replacement lamps for the choppers.
>
> They are a G4 base, 6.3v, 0.15A lamp.
> Digikey, Mouser, Farnell nor RS seem to have them.
>
> Does anyone know of a source, please? (UK preferred, but beggars can't be choosers.)





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

 

Dear All,

Do the (more modern?) units keep a track of their power on time?

For example I am thinking of my 34410A...

???

Thanks.

Best wishes,
Susan.
Re: CRT Needed for HP 54520A Scope

 

Hi Dan,
If you are prepared to throw those CRTs away, why not try rejuvenating them?
See www.ke5fx.com/crt.html
www.thegleam.com/ke5fx/crt/sencore.pdf

And use some ideas from here :



cslim

On Sat, Mar 9, 2013 at 6:12 AM, danaz.chandler <djn@...> wrote:



Hi gang...I need to replace the CRT in two or three HP 54520A scopes.
While the one's installed work, they are very well burnt and getting dim.

The tube is an HP 2090-0324 Hitachi Mizusawa J260194 9" P31 Green phosphor
tube.

If any one has a boneyard scope with a good CRT, I could use a few. Also,
can use the trim strip that holds the case to the front bezel.

Question: Would most 9" CRT's work with the existing video board?

Any help or thoughts appreciated.

Dan in Chandler AZ

=====================================================
Re: HP 1740A Parts wanted

 

I have two DOA 1740's to turn into one working unit, send me a note during the week if you strike out. Might have what you need.

Regards,
Chris

Sent from my outdated iPhone wireless thingy

On Mar 8, 2013, at 6:29 PM, "raymonduk2000" <raymonduk2000@...> wrote:

hello,

been looking in the net for spares for HP1740A oscilloscope

(see picture for details)
I wonder if you can help me find a knob ( cal ) ch1 [ 1 in picture] , and the (time) [ 2 in picture] in addition to front cover (this is to look after the CRT screen)
sorry I do not know the exact part numbers.

thank you




[Non-text portions of this message have been removed]
Re: LIF File Conversion.

 

Jay:

I have had success! This is what I learned:

* Use Agilent LIFUTIL to pull the file off the HP LIF diskette
^ Drive has to be built in so the floppy controller chip is able to be directly instructed by the software.
^ Has to be a FAT or FAT32 machine or the software barfs.
^ Often the file on the HP LIF diskette is a tokenized basic. This means that one or more hex values have been saved instead of the ascii text. So "GOTO" will be a HEX value.
# So far, the only way to convert an HP tokenized basic file to an ASCII file is to load it into a vintage HP series 300 computer and then re-save in the ascii format. The LIFUTIL has to be run to save the header information.

A lot of steps, but it is possible with help from our HP cloud to get important software off of LIF disks....

Dan in Chandler, AZ
================================================

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

A bit late to this discussion, but have you given this a try?


Jay

--- In hp_agilent_equipment@..., "danaz.chandler" <djn@> wrote:


I need to convert software on a LIF 3.5" Floppy and save on a Windows 7 machine. All the utilities I have seen won't.
So, I thought....Load the diskette into my HP 4195A, bring up Vee Pro 9.2, install a panel driver and access the floppy that way.

However, I am such a novice with Vee, that I don't know how to transfer the file to my hard disk...Any pointers?

Dan in Chandler, AZ
oscilloscope probe tips

 

Greetings,

I have several agilent 10:1 passive probes (N2862A) and need some retractable spring hook tips (PN#: 0960-2900).

I searched the internet and distributors listed as Agilent dealers. Many had the REV. B version of the probe, but none that I found listed or stocked the tip.

The Agilent website (on-line store) lists them in stock at $4.66 each. However, I have learned that the on-line store is user belligerent and apparently designed to get potential customers to go away.

Can anyone point me in the direction of a source that has these probe tips in stock (in the USA) and actually wants to sell them?

Thanks for your time and consideration.

Regards,

Ken
Re: making 50 ohm measurements with a 75-ohm s-parameter test set

bdunn246
 

Hi all-

Thanks much for the feedback. In my original post, I neglected to mention I do plan to make 2-port measurements of amps, filters, etc. I guess it slipped my mind given how easy through calibration is! :-)

For my planned antenna return loss measurements, I see your point, David, that 30 dB is probably excessive. Perhaps 25 dB +/- 3 dB is a more realistic goal. I wonder, at my target frequencies (up to 450 MHz), could i reach this goal if I built my own cal standards for open and short using N connectors?

Thanks,
Bryan

--- In hp_agilent_equipment@..., Brooke Clarke <brooke@...> wrote:

Hi Bryan:

You might get a Mini Circuits ZFDC-10-1 coupler. See:

and

Note the marker is near the 50 MHz vertical line and the line just to it's right is 100 Mhz because of the LOG frequency
scale.
The vertical line over the "0" in POWER 0 dBm" is 100 kHz and above that frequency you can see over 40 dB return loss.

Have Fun,

Brooke Clarke



hp_agilent_equipment@... wrote:
making 50 ohm measurements with a 75-ohm s-parameter test set
Re: HP 8640B Troubleshooting help needed

kn4hhptc
 

Frank, thank you for the suggestion. ?The -20volt regulator had failed. After replacement, the unit works very well.
Thanks again.
73, Bob, KN4HH




Sent from Samsung tabletfrancesco messineo <francesco.messineo@...> wrote:As in almost all electronic troubleshooting, I'd start with checking
all power supplies.

good luck
Frank? IZ8DWF

On Wed, Feb 27, 2013 at 2:56 PM, kn4hhptc <kn4hhptc@...> wrote:



Good day, all. I have a HP8640B signal generator that I use to service and maintain vintage amateur radio equipment. It has worked perfectly until today. After applying line voltage, the output meter pegs to the right and the frequency counter reads all zero's. No front panel controls have any effect on this condition. I would appreciate some advice on where to start looking for the problem. I have the service manual.

Thanks for any assistance,

Bob, KN4HH


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

Yahoo! Groups Links





[Non-text portions of this message have been removed]
Re: HP 1740A Parts wanted

 

thank for the reply

I had a look and got the info from the HP 1740A Oscilloscope Operator's Manual Page 57 (see Picture)


reference part code

cover Mp20 01740-64101

knob mp3 0370-0963

knob MP40 01720-67405



from the manual

my scope

Re: HP 1740A Parts wanted

 

Part numbers would help. I have some knobs NOS but I am not inclined to look up what goes on that scope.
Dennis

From: raymonduk2000 <raymonduk2000@...>
To: hp_agilent_equipment@...
Sent: Friday, March 8, 2013 7:29 PM
Subject: [hp_agilent_equipment] HP 1740A Parts wanted

hello,

been looking in the net for spares for HP1740A oscilloscope?

(see picture for details)
I wonder if you can help me find a knob ( cal ) ch1 [ 1 in picture] ,? and the (time) [ 2 in picture] in addition to front cover (this is to look after the CRT screen)
sorry I do not know the exact part numbers.

thank you






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

Yahoo! Groups Links



[Non-text portions of this message have been removed]
HP 1740A Parts wanted

 

hello,

been looking in the net for spares for HP1740A oscilloscope

(see picture for details)
I wonder if you can help me find a knob ( cal ) ch1 [ 1 in picture] , and the (time) [ 2 in picture] in addition to front cover (this is to look after the CRT screen)
sorry I do not know the exact part numbers.

thank you
CRT Needed for HP 54520A Scope

 

Hi gang...I need to replace the CRT in two or three HP 54520A scopes. While the one's installed work, they are very well burnt and getting dim.

The tube is an HP 2090-0324 Hitachi Mizusawa J260194 9" P31 Green phosphor tube.

If any one has a boneyard scope with a good CRT, I could use a few. Also, can use the trim strip that holds the case to the front bezel.

Question: Would most 9" CRT's work with the existing video board?

Any help or thoughts appreciated.

Dan in Chandler AZ

=====================================================
Re: 8753D floppy disk convert to usb?

 

I have an 8753D with the standard TEAC FD-04 floppy drive. I decided to attempt to replace the floppy drive with an emulator that substituted the floppy disk with a USB memory stick (thumb drive, usb drive, etc).

I did some research (not enough obviously) and purchased a GOTEK slim line (0.5") emulator on ebay from a seller called "e2wholesale".

Here is the 8753D upside down with the original floppy removed.


Here is the model designation on the original floppy:


In addition to the drive being "slimline" it also uses a 26 pin flat cable instead of the more common 34 pin IDC.


Here is a picture showing the cable that is connected to the 8753D:


And with the original drive removed:


here is the new floppy emulator:



And now a photo of the new floppy emulator connected but not yet in place:



We took a USB drive and put it into the device. Then in the 8753D we went to the save/recall menu and changed to the "internal drive" here are the results:


As you can see, it is reading the DOS files on the USB drive with great success! Then we attempted to "SAVE" from the 8753D onto the USB drive:


And you can see in addition to the DOS files there is now "FILE00" ISTATE file. At this point I thought the project was complete and began to physically install the disk emulator. This was a little tricky because I had to loosen the front panel of the VNA to allow me to remove the metal carrier tray that the drive or emulator must attach to.



Well, I thought the project was done, but in fact it doesn't really work very well. Allow me to explain. The first problem with this emulator is that it has a button that must be pressed to put the emulator in "WRITE" mode. If you don't do this before you attempt to save some data from the VNA, the data will write to the internal memory of the emulator but you will not be able to write it to the USB drive. This is annoying because it is hard to remember to push this button.

The 8753D vector network analyzer performs in the following way¡­ Information is stored on the floppy by using an incrementing filename. The user has little control over the filename. The floppy is read (catalog). If the floppy is empty, the first time you save your data it will be saved as "FILE00" and the second time you save the filename will be "FILE01" and so on. The way the device determines what the next number to use is by "reading" the floppy before writing the file. It will use (max+1) for the new filename. Now, here is the problem.

Before I begin to save a new file, I press the left button (WRITE MODE). Then I initiate the SAVE function on the VNA. Well, the first thing it does is do a directory read (catalog) in order to determine the right file name to use. The problem is that while the USB emulator is in "write mode" it cannot be read. So a directory request (catalog as the 8753D calls it) will show NO files on the USB drive! Because of this, it will always write the file as FILE00 which overwrites the existing FILE00 file that was already on the USB drive.

What is needed is that even during a WRITE mode, a read should be allowed to occur. If a read occurs during the write mode, it should be allowed to work.

So Bottom Line: This kinda works. As long as you only care about storing one state file at a time for transferring to a PC, this will work fine (albeit cumbersome having to press the button before writing). If you want to store multiple states on the usb, you will have some trouble doing this, but again for transporting one file from the VNA to a PC it will work. Second issue is that deleting or renaming files does not seem to work.

So I have ordered a different USB floppy emulator from another company which is more expensive, but I will try that out in about a month and report on my findings then.

Regards
Eugene W2HX
Re: Lamps and Mains Lead for HP412A?

 

Thanks for the tip, Cliff.

They're not exactly like the HP ones, but they may well suffice... certainly worth a try at 36p each!

73,
Mike
M0MLM

----- Original Message -----
From: Cliff Barber
To: hp_agilent_equipment@...
Sent: Friday, March 08, 2013 2:35 PM
Subject: Re: [hp_agilent_equipment] Re: Lamps and Mains Lead for HP412A?



Hi,
I wonder if Ebay item 360327851354 might be suitable.
I had a similar requirement a few weeks ago, but managed to find something from my "junk-box"
Cliff
G4BGP

----- Original Message -----
From: mike
To: hp_agilent_equipment@...
Sent: Friday, March 08, 2013 1:41 PM
Subject: [hp_agilent_equipment] Re: Lamps and Mains Lead for HP412A?

Hi Dave,

Neither, I'm afraid, but the halogen is closest, physically.

It's a 6.3v, 0.15A lamp with 4mm pin pitch.

Mike

--- In hp_agilent_equipment@..., "David C. Partridge" <david.partridge@...> wrote:
>
> G4 (bi-pin halogen) or G4-1/2 (miniature Edison Screw, also known as E10)? If the latter both digikey and mouser stock some
>
> Dave
> -----Original Message-----
> From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of mike
> Sent: 08 March 2013 08:15
> To: hp_agilent_equipment@...
> Subject: [hp_agilent_equipment] Lamps and Mains Lead for HP412A?
>
> I've just acquired an HP412A & would like to find some replacement lamps for the choppers.
>
> They are a G4 base, 6.3v, 0.15A lamp.
> Digikey, Mouser, Farnell nor RS seem to have them.
>
> Does anyone know of a source, please? (UK preferred, but beggars can't be choosers.)
Re: Lamps and Mains Lead for HP412A?

 

Yes, I could easily convert them to LEDs, but I'd like to stick closer to the original if I can.

Thanks for the suggestion, though.

Mike
M0MLM

----- Original Message -----
From: Cliff White
To: hp_agilent_equipment@...
Sent: Friday, March 08, 2013 4:04 PM
Subject: Re: [hp_agilent_equipment] Re: Lamps and Mains Lead for HP412A?



I don't know the specifics on this, but I seem to remember an article I
read somewhere on converting them to LEDs. That might be a possibility.

Respectfully,
Cliff White, W5CNW
w5cnw@... <mailto:w5cnw@...>
On 03/08/2013 08:35 AM, Cliff Barber wrote:
> Hi,
> I wonder if Ebay item 360327851354 might be suitable.
> I had a similar requirement a few weeks ago, but managed to find something from my "junk-box"
> Cliff
> G4BGP
>
> ----- Original Message -----
> From: mike
> To: hp_agilent_equipment@...
> Sent: Friday, March 08, 2013 1:41 PM
> Subject: [hp_agilent_equipment] Re: Lamps and Mains Lead for HP412A?
>
>
>
>
>
> Hi Dave,
>
> Neither, I'm afraid, but the halogen is closest, physically.
>
> It's a 6.3v, 0.15A lamp with 4mm pin pitch.
>
> Mike
>
> --- In hp_agilent_equipment@..., "David C. Partridge" <david.partridge@...> wrote:
> >
> > G4 (bi-pin halogen) or G4-1/2 (miniature Edison Screw, also known as E10)? If the latter both digikey and mouser stock some
> >
> > Dave
> > -----Original Message-----
> > From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] On Behalf Of mike
> > Sent: 08 March 2013 08:15
> > To: hp_agilent_equipment@...
> > Subject: [hp_agilent_equipment] Lamps and Mains Lead for HP412A?
> >
> > I've just acquired an HP412A & would like to find some replacement lamps for the choppers.
> >
> > They are a G4 base, 6.3v, 0.15A lamp.
> > Digikey, Mouser, Farnell nor RS seem to have them.
> >
> > Does anyone know of a source, please? (UK preferred, but beggars can't be choosers.)
HP 8444a Tracking Generator

Terry Maurice
 

I am looking for fully functioning HP 8444a tracking generator.

Please contact me if you have one for sale.

Thanks

Terry
--
*VE3XTM* EN93un

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