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Re: RF Voltmeter?

 

开云体育

Sorry to reply to group but direct email does not seem to get to you

I would be interested in the probe

Can you try sending me a direct email kochcal at earthlink dot net

?

thanks

John

?

From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Saturday, October 14, 2017 8:16 AM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re: RF Voltmeter?

?




All,

?

I have a probe for the Boonton 91 just about free for the asking. It is a model 91-3C (electrical condition unknown - if you know how to test, tell me and I'll do it) with no screw-on tips and with a section of the cable taped for a few inches; it was probably attacked by a rogue soldering iron back in the day. It might fit in a padded envelope or it might have to go small flat-rate. Let me know if you're interested.

?

geo
Re: 3585B Spectrum Analyzer

[email protected]
 

Thanks Dennis.? I started the troubleshooting as you suggested but ran out of time tonight.?

I'll be sure to report on what I find, hopefully something simple, but who knows. :)

Peter
Re: Fake fire New

 

?Whats with the "Fake News" rhetoric. Using the term "Fake News" infers purposeful?deception which I highly doubt is the case. Reporters are humans and they do make mistakes. Also, not everyone?is an electronics nerd interested in $100,000 pieces?of test gear so It's not surprising that a normal person wouldn't know who Keysight is. How many electronics geeks?know who Beneteau is ??and yet they are worlds most highly regarded?builders of high-performance cruising and racing sailboats. By the way, a quick check if the USGS shows that there was indeed a small earthquake just outside Sonoma on the 14th.? ??
Re: 3585B Spectrum Analyzer

 

Peter,

The calibration error codes are listed in service manual volume 3, page 11-15. May be ROM Checksum Error but follow recommended procedure in manual for your particular observations.

Dennis



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

On Sat, 10/14/17, ve3poa@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

Subject: [hp_agilent_equipment] 3585B Spectrum Analyzer
To: hp_agilent_equipment@...
Date: Saturday, October 14, 2017, 3:40 PM






























I was fortunate enough to receive the 3585b SA recently.
When I first picked it up it powered up fine and display
appeared to be normal.? Getting it home and after
setting it up, it again worked fine. I ran some tests and
looked at signals on the screen and was happy with what I
was seeing.

However powering it up a couple of days later, there is no
display other than a dot in the centre that flashes. While
booting up, 1st heard is one beep followed shortly by 2 and
then a long pause before several beeps are heard,
about? 28.? They start off quickly and then slow
down near the end.

I've re-seated some boards and several connections with
no change in results.

Any help in pointing me in next steps would be most
appreciated.

thanks, Peter
ve3poa
3585B Spectrum Analyzer

[email protected]
 

I was fortunate enough to receive the 3585b SA recently. When I first picked it up it powered up fine and display appeared to be normal.? Getting it home and after setting it up, it again worked fine. I ran some tests and looked at signals on the screen and was happy with what I was seeing.

However powering it up a couple of days later, there is no display other than a dot in the centre that flashes. While booting up, 1st heard is one beep followed shortly by 2 and then a long pause before several beeps are heard, about? 28.? They start off quickly and then slow down near the end.

I've re-seated some boards and several connections with no change in results.

Any help in pointing me in next steps would be most appreciated.

thanks, Peter
ve3poa
Re: RF Voltmeter?

 

All,

I have a probe for the Boonton 91 just about free for the asking. It is a model 91-3C (electrical condition unknown - if you know how to test, tell me and I'll do it) with no screw-on tips and with a section of the cable taped for a few inches; it was probably attacked by a rogue soldering iron back in the day. It might fit in a padded envelope or it might have to go small flat-rate. Let me know if you're interested.

geo
Re: help hp5300a / 5303a manual service

[email protected]
 

thank
Roberto
Re: Just purchased HP 3586B--EBAY

 

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<font size="2"><span style="font-size:10pt;"><div class="PlainText">Hi Lamont<br>
<br>
Error code CE-1 is a failure in the input attenuator on the A2 board.&nbsp; Has the unit been accidentally transmitted to?<br>
<br>
73 George G6HIG<br>
________________________________________<br>
From: hp_agilent_equipment@... <hp_agilent_equipment@...> on behalf of george g_einst@... [hp_agilent_equipment] <hp_agilent_equipment@...><br>
Sent: 13 October 2017 22:25<br>
To: hp_agilent_equipment@...<br>
Subject: Re: [hp_agilent_equipment] Just purchased HP 3586B--EBAY<br>
<br>
Hi Lamont<br>
<br>
According to the HP 3586 user manual the B variant already has a BNC input that is switchable between 50 and 75 Ohms.<br>
<br>
The A and B variants were teleco &quot;specials" the C variant was the general use one, however it is quite possible that your B may not be as the manual and was customised for a specific client.<br>
<br>
A by far larger problem with 3586's is the NiCad ram backup battery which leaks and contaminates/corrodes the PCB edge connector, this must be the first check that you do.<br>
<br>
73 George G6HIG<br>
________________________________________<br>
From: hp_agilent_equipment@... <hp_agilent_equipment@...> on behalf of nojunk@... [hp_agilent_equipment] <hp_agilent_equipment@...><br>
Sent: 13 October 2017 17:14<br>
To: hp_agilent_equipment@...<br>
Subject: [hp_agilent_equipment] Just purchased HP 3586B--EBAY<br>
<br>
I waiting to get it, I 'm pretty excited, but also concerned it will need repair.<br>
In the listing I note is the display has error code of&nbsp; CE-1. The manual says,<br>
"Operator error, Attempt made to Manualy change the FULL SCALE while in Auto Range"<br>
So I hope that is not a real problem.<br>
&nbsp; I will be changing the WECO input connectors to BNC. I note the unit is 75 ohm, I'll be working with<br>
50 ohms.Is it wise to put a 50 ohm to 75 ohm L pad internal when I install the BNC connector?<br>
And then note, "all measurements are MINUS5.72 DB".<br>
&nbsp;What would I add/subtract if I just plugged a 50 source into the 75 ohm input?<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thanks, Lamont<br>
.<br>
<br>
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Re: RF Voltmeter?

 

It's similar to the HP 3400A and the Ballantine 323. The HP 3403C is
a true thermal RMS meter, with 100MHz bandwidth.
And there the Millivac MV828-A which goes to just over 1GHz with 1mV FSD
(-50dBm with the 50 Ohm head)
Chopper amp and very stable...if you see one for sale make sure it comes with
the cable (Mil Spec style plug) and with the plug in 50 Ohm BNC terminator

And reliable..been using mine for over 10 years without a hiccup
And there is an Hp 3400B which doubles the hi end bandwidth over the A model
and has a solid state chopper.
The Ballantine 323A series is more versatile than the Hp 3400 series and has a much
larger scale with better reading accuracy with selectable input isolation
from case , (that the Hp hasn't), and several options, meter damping ranges, battery operation
and with bandwidths usually far in excess of the specs....the earlier ones used a mech
chopper , later ones were solid state, but specs very much the same for both.
Above might help if looking for a unit suitable for your purpose
John Byers
Re: Just purchased HP 3586B--EBAY

 

I suspect that the WECO 372A is made up of two WECO 358A plugs along-side each other ‘cos we always used a pair of WECO 477B sockets for 124 Ohm on the front panel. In fact the ones we used were supplied direct

from Western Electric for contract products ‘cos the genuine article is not available commercially (I think). For Options such as on the 3586B, I believe the connectors used would be “commercial equivalents” of the WECO products. Trompeter and ADC (Minneapolis?) are the two manufacturers which mainly come to mind.



Regards Bill Lauchlan



From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Friday, October 13, 2017 11:06 PM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] Re: Just purchased HP 3586B--EBAY





The RCA 50 ohm WECO type connector for broadcast patch panels has a .050" pin diameter. The standard WECO 358A 75 ohm connector has a .090" diameter pin. Both possess a .375" diameter barrel. The mini-WECO (WECO 440) has a totally different barrel diameter (.298"). HP specifies a WECO 372A connector to fit the 124 ohm port.

It is worth checking to see if the 3506B has option 001. If so, HP uses the 358A/75 ohm & 372A/124 ohm connectors. The three units I have here all have option 001. If it is a model with non-optioning (one of the more rare units from what I have found), the 75 ohm input uses the WECO 439/440A (mini-WECO), the 124 ohm input uses the WECO 443A, the 135 ohm input uses the WECO 431A and the 600 ohm input uses the WECO 310 (TRS plug).

And a word of caution on the 310 plug. Although it looks like a standard 1/4" stereo plug, it is not. Dimensions are different and the tip and ring are of a smaller diameter. Pushing a standard stereo plug into the jack on the unit will most likely either distort the jack contacts or damage them requiring replacement of the jack..

Greg
Re: Just purchased HP 3586B--EBAY

 

I saw that 3586 on ebay. the connectors on the back labeled Oven output and external reference need to be connected to each other. There are articles on the internet on how to convert the inputs from 75 ohm impedance to 50 ohm impedance. Check the schematic on the 3586C which has a 50 ohm impedance input.
Paul Koby
KA5OBI ?
Re: Just purchased HP 3586B--EBAY

 

The RCA 50 ohm WECO type connector for broadcast patch panels has a .050" pin diameter.? The standard WECO 358A 75 ohm connector has a .090" diameter pin.? Both possess a .375" diameter barrel.? The mini-WECO (WECO 440) has a totally different barrel diameter (.298").? HP specifies a WECO 372A connector to fit the 124 ohm port.

It is worth checking to see if the 3506B has option 001.? If so, HP uses the 358A/75 ohm & 372A/124 ohm connectors.? The three units I have here all have option 001.? If it is a model with non-optioning (one of the more rare units from what I have found), the 75 ohm input uses the WECO 439/440A (mini-WECO), the 124 ohm input uses the WECO 443A, the 135 ohm input uses the WECO 431A and the 600 ohm input uses the WECO 310 (TRS plug).

And a word of caution on the 310 plug.? Although it looks like a standard 1/4" stereo plug, it is not.? Dimensions are different and the tip and ring are of a smaller diameter.? Pushing a standard stereo plug into the jack on the unit will most likely either distort the jack contacts or damage them requiring replacement of the jack..

Greg
Re: Just purchased HP 3586B--EBAY

 

开云体育

The correct matching parts are a WECO 358A Plug to a WECO 477B Socket. The comment(s) about Trompeter Plugs is absolutely correct. I’m not sure if there is different part which is a direct equivalent for 358A

I have to check adapters called up in HP3586B Manual(s).

?

Bill Lauchlan

?

From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Friday, October 13, 2017 10:28 PM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] Re: Just purchased HP 3586B--EBAY

?

?

HP specifically states on their spec sheet for the 3586 that the 75 ohm port mates with the WECO 358A plug.

Greg
Re: Just purchased HP 3586B--EBAY

 

HP specifically states on their spec sheet for the 3586 that the 75 ohm port mates with the WECO 358A plug.

Greg
Re: Some HP 8341A questions

 

In a typical HP YTO loop config, one end of the main coil is connected to -40V, the other is connected to the emitter of the main coil driver. The current through the main coil is controlled by the drive transistor. Look closer to your driver board.?

The main coil has absolutely no chance of surviving a 40V DC. Do you have? schematics of the YTO loop?

Good luck,
Calvin
Re: Just purchased HP 3586B--EBAY

 

Almost all of the connectors that you will find that are
made by Trompeter are not compatible with the WECO 358.

Be careful, the shield fits, but the center pin won't engage.

They were made for 75 ohm video patch panels, and the WECO
are 70 ohm.

-Chuck Harris

big_sky_explorer@... [hp_agilent_equipment] wrote:

You might also consider picking up one or two WECO to BNC adapters for the unit. It would save the effort of having to disassemble it and change over to BNC connectors.

If you use the search terms "Trompeter WECO" on eBy you will find several listings, some reasonably priced but make sure that you pick up the normal version for there is also a mini-WECO plug made as well.

According to the HP data sheet, the 75 ohm output connector with Option 001 mates with the WECO 358 connector. And if I am not mistaken, a company named MilesTek (no affiliation) has the adapter for about $13 (see ). They also sell the mini-WECO as well.

Without dragging my 3586 out of storage, I'm sorry that I can't offer a little more help.

Greg
Re: Just purchased HP 3586B--EBAY

 

You might also consider picking up one or two WECO to BNC adapters for the unit.? It would save the effort of having to disassemble it and change over to BNC connectors.

If you use the search terms "Trompeter WECO" on eBy you will find several listings, some reasonably priced but make sure that you pick up the normal version for there is also a mini-WECO plug made as well.

According to the HP data sheet, the 75 ohm output connector with Option 001 mates with the WECO 358 connector.? And if I am not mistaken, a company named MilesTek (no affiliation) has the adapter for about $13 (see ).? They also sell the mini-WECO as well.

Without dragging my 3586 out of storage, I'm sorry that I can't offer a little more help.

Greg
Re: RF Voltmeter?

[email protected]
 

I have a Ballantine 323 AC voltmeter and a Boonton 91H RF "millivoltmeter".? The Ballantine is solid-state and has a usable range to 20 MHz, the Boonton is vacuum-tube and has a usable range to 1200 MHz.? The Boonton meters are relatively easy to find, but the probes, cables and probe accessories are often very scarce.? Both meters have the lowest scale of 1 mV FS.??? The meters have different intended purposes.? I'm sure that you could use them interchangeably for a few limited applications, but that's not what they were designed for.

Mike, WB0LDJ
mharmon at att dot net
436A power meter front panel inquiry

 


Before I resort to that famous auction site I wanted to inquire on this list to see if anyone might have parted out a 436A power meter and have a spare front panel in good condition available.? I just acquired a 436A that is in near new condition but, as many of us may experience in our gatherings someone decided to remove labels from the front panel and utilized a pocket knife, paint scraper, razor blade or something of that nature.? My unit unfortunately has lost much of the panel nomenclature along the right 1/3 or slightly greater area from what appears to be scraping and some form of aggressive solvent (MEK, acetone, lacquer thinner, etc.) applied to the plastic surface.

?

The upside was a very reasonable price which included a working 18 GHz power sensor and the 30W attenuator as well.? The power meter itself is cosmetically perfect all the way around and works well.? Fortunately no one decided to use a permanent marker on the cover (classical military disposal depot trick). It’s just sad knowing that the non-technical don’t understand how to treat a fine piece of expensive (and working) equipment.


Thanks,


Greg
Re: Just purchased HP 3586B--EBAY

 

Hi Lamont

According to the HP 3586 user manual the B variant already has a BNC input that is switchable between 50 and 75 Ohms.

The A and B variants were teleco "specials" the C variant was the general use one, however it is quite possible that your B may not be as the manual and was customised for a specific client.

A by far larger problem with 3586's is the NiCad ram backup battery which leaks and contaminates/corrodes the PCB edge connector, this must be the first check that you do.

73 George G6HIG
________________________________________
From: hp_agilent_equipment@... <hp_agilent_equipment@...> on behalf of nojunk@... [hp_agilent_equipment] <hp_agilent_equipment@...>
Sent: 13 October 2017 17:14
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Just purchased HP 3586B--EBAY

I waiting to get it, I 'm pretty excited, but also concerned it will need repair.
In the listing I note is the display has error code of CE-1. The manual says,
"Operator error, Attempt made to Manualy change the FULL SCALE while in Auto Range"
So I hope that is not a real problem.
I will be changing the WECO input connectors to BNC. I note the unit is 75 ohm, I'll be working with
50 ohms.Is it wise to put a 50 ohm to 75 ohm L pad internal when I install the BNC connector?
And then note, "all measurements are MINUS5.72 DB".
What would I add/subtract if I just plugged a 50 source into the 75 ohm input?
Thanks, Lamont
.
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