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Date
Re: Neon pilot lights 1450-0566

 

I actually had the spring clip slice through the plastic housing and snip the lens off of the indicator on my 141T.? I came in the lab one day and there was the front lens assembly of the indicator lying on the bench with the neon bulb sticking out of the hole in the front panel. But about that time I was in the process of moving to another state and packet up the 141T which still has not been unpacked.

?

If I can remember, this indicator has a housing that is considerably shorter than the similar neon ones available these days and that there is limited clearance behind the panel in that instrument.? In addition, it has become hard to find a replacement indicator that fits in the smaller hole that HP has for their item.? Most neon indicators available nowadays are considerably larger in diameter.

?

But the idea of putting in another neon lamp started me thinking towards an LED replacement.? I do realize that the present 141T indicator runs on 115V but there are LED indicator assemblies starting to appear out there that also are for 115 VAC and are in similar size enclosures.? Lumex is one manufacturer that makes a very small housing LED indicator in various output colors.? A few of them can be found at Mouser Electronics () or other distributors.? At Mouser, try their web catalog page 179

and look near the bottom of the page.? The data sheet for the yellow indicator can be found at

This particular one fits in a hole a little over one quarter inch diameter.? They are a little pricey but I feel that it worth it if you don’t ever have to go hunting for another replacement again for the life of the instrument or resort to complete instrument disassembly to keep replacing it.? Besides, it makes decades old equipment look a little more up to date.

?

For those replacement applications where space is available, I have been purchasing a little kit from Velleman that has a tiny printed circuit board that contains all of the necessary parts to run the LED from AC power.? Jameco Electronics () sells it under stock number 2196561.? If I don’t have front panel space available, I simply install it in a remote location on the equipment chassis, remove the existing LED from the board and run wires up to the location where I have installed a LED fixture that nears the original neon indicator that is being replaced.

?

A recent Velleman board use was in a Bird 10 kW RF termination that had a neon power on indicator that is manufactured in France and uses a slide base neon lamp of extremely small dimension (and also very expensive, wears out fast and is fairly unobtanium).? I snapped in the Velleman board elsewhere on the chassis, ran the wires up to the original indicator housing, inserted a slide base LED and no longer have to worry about the lamp wearing out again.


Greg
Re: Part Needed

 

An add-on board will not be needed.

For a Minicircuits MAR-3+ type of MMIC amplifier, remove R2, short C3,
move the old C3 to where R2 was, and install a 270 ohm resistor
between +15.7 volts where R2 was connected and the output of the
amplifier.

Someone else may have a better suggestion about which exact amplifier
to use.

On 22 Feb 2016 18:02:52 -0800, you wrote:

Thanks for the response. I'm a purist when it comes to using the original HP part, so I want to try find it if it still available. I was unable to cross-reference the 5088-7036 to any manufacturer/part number, so perhaps this is a custom part that HP had made. It was also used in the 5355A plug in for the 5345A counter.

I may have to go the Minicircuits route, so I'll take a look. It seems likely that there will need to be an add-on board to handle the new MMIC and biasing components.

Please let me know if you find something on the original part, or if you have any ideas on retrofitting the MMIC.

I really appreciate the responses!

Thanks,

Joe, KN5U
Re: How do you clean buttons on HP uWave gear?

 

Thanks, great to have a link. A feeler gauge will get you a few pieces though, so in the scheme of things it's still a cheap repair. If you know a machinist he will usually have some shim stock also.

Peter

On 2/22/2016 9:39 PM, Brad Thompson brad.thompson@... [hp_agilent_equipment] wrote:



On 2/22/2016 9:31 PM, Peter Gottlieb hpnpilot@...
[hp_agilent_equipment] wrote:

Generally you remove the front panel circuit board and front panel, then
separate the PCB and that will get you enough access to work on the
buttons. Do
this over a benchtop as some of the little springs may have popped out
and it's
best to not lose them. Straighten them gently and carefully use
tweezers to get
then in and under a little feature on the button shaft. You'll see
what I mean
when you're in there. If you are missing any look in the archives, spring
stainless shim stock of a certain thickness works and can be cut with a
scissors. If ANY buttons are stuck in things will not work right. If the
encoder is dead it's likely the internal light bulb burned out. Look
in the
archives for the number, it's not too hard to replace.
Hello--

Here's a column which I wrote a few years ago that describes the
switches and replacement
shim stock-- it's 0.002 inches thick. Depending on what
automobile-repair resources are available
to you, the only source of shim stock may be a feeler gauge:



73--

Brad AA1IP
Re: How do you clean buttons on HP uWave gear?

 

On 2/22/2016 9:31 PM, Peter Gottlieb hpnpilot@... [hp_agilent_equipment] wrote:

Generally you remove the front panel circuit board and front panel, then
separate the PCB and that will get you enough access to work on the buttons. Do
this over a benchtop as some of the little springs may have popped out and it's
best to not lose them. Straighten them gently and carefully use tweezers to get
then in and under a little feature on the button shaft. You'll see what I mean
when you're in there. If you are missing any look in the archives, spring
stainless shim stock of a certain thickness works and can be cut with a
scissors. If ANY buttons are stuck in things will not work right. If the
encoder is dead it's likely the internal light bulb burned out. Look in the
archives for the number, it's not too hard to replace.
Hello--

Here's a column which I wrote a few years ago that describes the switches and replacement
shim stock-- it's 0.002 inches thick. Depending on what automobile-repair resources are available
to you, the only source of shim stock may be a feeler gauge:



73--

Brad AA1IP
Re: How do you clean buttons on HP uWave gear?

 

Generally you remove the front panel circuit board and front panel, then separate the PCB and that will get you enough access to work on the buttons. Do this over a benchtop as some of the little springs may have popped out and it's best to not lose them. Straighten them gently and carefully use tweezers to get then in and under a little feature on the button shaft. You'll see what I mean when you're in there. If you are missing any look in the archives, spring stainless shim stock of a certain thickness works and can be cut with a scissors. If ANY buttons are stuck in things will not work right. If the encoder is dead it's likely the internal light bulb burned out. Look in the archives for the number, it's not too hard to replace.

Peter

On 2/22/2016 6:27 PM, srdaven@... [hp_agilent_equipment] wrote:

I'm FINALLY getting around to hauling the stuff out of boxes - 15 years of storage, ugh.

I have an 8350A sweeper mainframe with 83595A 26.5GHz plug-in.

When turned on, an error message E0004 briefly shows in the mainframe display, then I see the usual display...red LEDs. In theory, there's a left RPG and right RPG that are setup to establish low and high freq of the sweep. The left RPG does nothing. The right RPG seems to have the expected affect.

I'm not sure the RPG is what's wrong, though....

Under the left-most RPG, are buttons labeled START, CW and CF, with yellow LEDS indicating which function is selected. The START LED is illuminated and that's that..pressing the buttons does nothing.

In the data entry area with the keyboard, one finds the usual units buttons GHz, MHz, and dBm. When pressing any one of them, it stays pressed. Come back an hour later, and it has finally released.

When I worked in Santa Rosa at HP/Agilent in the early 2000s, the official service policy on any of these buttons was "limited lifetime, replace or dispose". But I have to believe there's a procedure to get them functioning again.

The RF plug-in's buttons are equally defective.

Thanks!


Dave W8NF
Re: Part Needed

 

Thanks for the response. I'm a purist when it comes to using the original HP part, so I want to try find it if it still available. I was unable to cross-reference the 5088-7036 to any manufacturer/part number, so perhaps this is a custom part that HP had made. It was also used in the? 5355A plug in for the 5345A counter.


I may have to go the Minicircuits route, so?I'll take a look. It seems likely that there will need to be an add-on board to handle the new MMIC and biasing components.


Please let me know if?you find something on the original part, or if you have any ideas on retrofitting the MMIC.


I really appreciate the responses!


Thanks,


Joe, KN5U
Re: How do you clean buttons on HP uWave gear?

 

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Dave,

?

The RPG may well have a ‘dead bulb’.? The bulb is a 683.? Easy to remove and test.

?

Good luck.

?

Joe

?

From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Monday, February 22, 2016 5:27 PM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] How do you clean buttons on HP uWave gear?

?

?

I'm FINALLY getting around to hauling the stuff out of boxes - 15 years of storage, ugh.

I have an 8350A sweeper mainframe with 83595A 26.5GHz plug-in.

When turned on, an error message E0004 briefly shows in the mainframe display, then I see the usual display...red LEDs.? In theory, there's a left RPG and right RPG that are setup to establish low and high freq of the sweep.? The left RPG does nothing.? The right RPG seems to have the expected affect.

I'm not sure the RPG is what's wrong, though....

Under the left-most RPG, are buttons labeled START, CW and CF, with yellow LEDS indicating which function is selected.? The START LED is illuminated and that's that..pressing the buttons does nothing.?

In the data entry area with the keyboard, one finds the usual units buttons GHz, MHz, and dBm.? When pressing any one of them, it stays pressed.? Come back an hour later, and it has finally released.

When I worked in Santa Rosa at HP/Agilent in the early 2000s, the official service policy on any of these buttons was "limited lifetime, replace or dispose".? But I have to believe there's a procedure to get them functioning again.

The RF plug-in's buttons are equally defective.

Thanks!


Dave W8NF

?
Re: How do you clean buttons on HP uWave gear?

 

?
Well I typed "buttons clean" followed by a "enter" into the search box and got 156 hits. I dont think its in any help-file but it works for me. I didnt read 'em all?to see if they were usefull though :-))
?
Alan
G3NYK?

----- Original Message -----
Sent: Monday, February 22, 2016 11:55 PM
Subject: RE: [hp_agilent_equipment] How do you clean buttons on HP uWave gear?

Regrettably, I have never been able to successfully search the archives on the 'new' yahoogroups, tried it and found nothing.

How hard is it to get into these switches, or does it depend completely on which box you're working on?

D

Re: How do you clean buttons on HP uWave gear?

[email protected]
 

Regrettably, I have never been able to successfully search the archives on the 'new' yahoogroups, tried it and found nothing.

How hard is it to get into these switches, or does it depend completely on which box you're working on?

D
Re: How do you clean buttons on HP uWave gear?

 

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Hi Dave!

?

This has been discussed here in the past, so you might want to look in the archives.? The simple answer is that they need cleaning.? There’s a thin metal strip in them that gets deflected when the switch is pressed, and it isn’t moving properly.? In bad cases, the strip gets trashed and you have to make a new one, usually out of shim stock.

I guess this gives me an excuse to call you!

?

Daun

?

Daun E. Yeagley, II, N8ASB

?

From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Monday, February 22, 2016 6:27 PM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] How do you clean buttons on HP uWave gear?

?

?

I'm FINALLY getting around to hauling the stuff out of boxes - 15 years of storage, ugh.

I have an 8350A sweeper mainframe with 83595A 26.5GHz plug-in.

When turned on, an error message E0004 briefly shows in the mainframe display, then I see the usual display...red LEDs.? In theory, there's a left RPG and right RPG that are setup to establish low and high freq of the sweep.? The left RPG does nothing.? The right RPG seems to have the expected affect.

I'm not sure the RPG is what's wrong, though....

Under the left-most RPG, are buttons labeled START, CW and CF, with yellow LEDS indicating which function is selected.? The START LED is illuminated and that's that..pressing the buttons does nothing.?

In the data entry area with the keyboard, one finds the usual units buttons GHz, MHz, and dBm.? When pressing any one of them, it stays pressed.? Come back an hour later, and it has finally re leased.

When I worked in Santa Rosa at HP/Agilent in the early 2000s, the official service policy on any of these buttons was "limited lifetime, replace or dispose".? But I have to believe there's a procedure to get them functioning again.

The RF plug-in's buttons are equally defective.

Thanks!


Dave W8NF

?
How do you clean buttons on HP uWave gear?

[email protected]
 

I'm FINALLY getting around to hauling the stuff out of boxes - 15 years of storage, ugh.

I have an 8350A sweeper mainframe with 83595A 26.5GHz plug-in.

When turned on, an error message E0004 briefly shows in the mainframe display, then I see the usual display...red LEDs.? In theory, there's a left RPG and right RPG that are setup to establish low and high freq of the sweep.? The left RPG does nothing.? The right RPG seems to have the expected affect.

I'm not sure the RPG is what's wrong, though....

Under the left-most RPG, are buttons labeled START, CW and CF, with yellow LEDS indicating which function is selected.? The START LED is illuminated and that's that..pressing the buttons does nothing.?

In the data entry area with the keyboard, one finds the usual units buttons GHz, MHz, and dBm.? When pressing any one of them, it stays pressed.? Come back an hour later, and it has finally released.

When I worked in Santa Rosa at HP/Agilent in the early 2000s, the official service policy on any of these buttons was "limited lifetime, replace or dispose".? But I have to believe there's a procedure to get them functioning again.

The RF plug-in's buttons are equally defective.

Thanks!


Dave W8NF
Re: Part Needed

 

I took a look at the schematic and while I think using one of the
various MMIC amplifiers from Minicircuits is the way to go, a couple
of passive parts will need to be added to the circuit for biasing; the
HP part handles that internally.

On 22 Feb 2016 11:38:10 -0800, you wrote:

If it's just an amplifier, you should be able to find something close enough from Minicircuits.

Ed
Re: Neon pilot lights 1450-0566

 

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On 2/22/2016 12:56 PM, kmec@... [hp_agilent_equipment] wrote:


No. But usually they will pull straight out the back in my experience and you can slip in an NE-2.? Jeff

Thanks Jeff, I've been trying that with no luck...? And it's really hard to get at in the 141T :^(

Dan
Re: Hp 70900B ROMs

[email protected]
 

Hi everyone,


Daun E. Yeagley, II, N8ASB was kind enough to send me the needed files, and upload them to KO4BB site as well. So a big thank you goes out to Daun for all his help.

However, if anyone has a rom/ram board within this part number range, I am interested in buying it.
70900-60160 to?70900-60204.


Thank you all for your attention!

Jim
Re: Neon pilot lights 1450-0566

 

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No. But usually they will pull straight out the back in my experience and you can slip in an NE-2.? Jeff
?
In a message dated 2/22/2016 1:03:42 P.M. Eastern Standard Time, hp_agilent_equipment@... writes:

?

I've just had my second dead neon bulb in three months, the last was on
a triple power supply and this is on a 141T mainframe. Not only is the
thing hard to get out being fitted with a spring clip that is only
designed to go one way, but it is hard to find a replacement for it.
Other than cutting it open and fitting an NE-2 is there any better way
of proceeding?

Dan
Re: Looking for a manual "250A RX Meter - Test and Alignment Procedures"

Bob Albert
 

I found a few hits for pdf manuals including one from HP.

Bob


On Monday, February 22, 2016 12:15 PM, "`Richard Knoppow dickburk@... [hp_agilent_equipment]" wrote:




??? I have an original -hp- handbook but its identical to the one on BAMA so not worth trying to scan.

On 2/22/2016 12:02 PM, petepdx1955@... [hp_agilent_equipment] wrote:
Just found out Manuals Plus had an original, Tucker (blah) had a copy for the usual rip off price.

Anyone have one or willing to make a copy, or let me copy it ?

-pete

--
Richard Knoppow
dickburk@...
WB6KBL
Re: eBay buyer protections are poor

 

I'm not encouraging anybody to act likewise... (Used to be an honest person though.)

Over the past few years I have been loosing enough money and time with eBay, Paypal and Chinese sellers that I no longer bother opening disputes in cases they should be opened.

Most of the time I warn the seller when paying that I will give negative feedback if there is an obvious fake.
If the fake arrives I do not claim money back, just leave the feedback and see what happens.

Anything originating from a professional seller in China without tracking number is up for a refund claim though, received or not.

Also avoid using the Global Shipping Program, that's another of eBay's rip-offs.
Re: Looking for a manual "250A RX Meter - Test and Alignment Procedures"

 

开云体育

??? I have an original -hp- handbook but its identical to the one on BAMA so not worth trying to scan.

On 2/22/2016 12:02 PM, petepdx1955@... [hp_agilent_equipment] wrote:

Just found out Manuals Plus had an original, Tucker (blah) had a copy for the usual rip off price.


Anyone have one or willing to make a copy, or let me copy it ?


-pete


-- 
Richard Knoppow
dickburk@...
WB6KBL
Looking for a manual "250A RX Meter - Test and Alignment Procedures"

 

Just found out Manuals Plus had an original, Tucker (blah) had a copy for the usual rip off price.


Anyone have one or willing to make a copy, or let me copy it ?


-pete
Re: Part Needed

 

If it's just an amplifier, you should be able to find something close enough from Minicircuits.

Ed
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