I got one of those too.
73, Mike,
Mike Stevens,
G8CUL/M0CUL/F4VRB.
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-----Original Message----- From: [email protected] On Behalf Of David C. Partridge Sent: 01 October 2020 18:16 To: [email protected]Subject: [HP-Agilent-Keysight-equipment] Spammer Please ban jara8462@... - sending phishing emails as PMs in reply to the list. David -- This email has been checked for viruses by Avast antivirus software.
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Please ban jara8462@... - sending phishing emails as PMs in
reply to the list.
David
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Re: Looking for small fiber washers
I hadn't seen that business before. Interesting; however, they don't stock washers (at least that's what the website states).
Thanks,
Barry - N4BUQ
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----- Original Message ----- From: "Leon Robinson" <leon-robinson@...>
To: [email protected]
Sent: Thursday, October 1, 2020 10:38:28 AM
Subject: Re: [HP-Agilent-Keysight-equipment] Looking for small fiber washers
I just got an email from BOKERS yesterday, they have almost anything you
could ever want.
Leon Robinson ?K5JLR
-------- Original message --------
From: n4buq <n4buq@...>
Date: 10/01/2020 10:14 AM (GMT-06:00)
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Looking for small fiber washers
I'm in the process of repairing an Acton Labs VTVM.? The RANGE switch was a
Centralab model with steatite wafers and someone had broken the wafers -
some of which were in pieces that made gluing them back together somewhat
impractical.? I have obtained glass-epoxy versions of those wafers and am
reassembling the switch; however, the original damage was enough to destroy
one of the tiny fiber washers that are used on the mounting strut
assemblies.
Does anyone know where I could get one (or, maybe, a few) of those?? I've
searched the web and can't find them and the Electroswitch site (they bought
Centralab) doesn't show them as available parts either.? If you're familiar
with them, they accommodate a #4 machine screw on the ID but the OD is very
small as well and all I can find are "standard" #4 fiber washers which are
too large.
I think these also are/were available in plastic or nylon and if there's a
source for those, they would work as well.
Sorry for the long email for such a small request but I don't know anywhere
else to look for these.
Thanks,
Barry - N4BUQ
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Re: Looking for small fiber washers
I just got an email from BOKERS yesterday, they have almost anything you could ever want.
Leon Robinson ?K5JLR
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Show quoted text
-------- Original message -------- From: n4buq <n4buq@...> Date: 10/01/2020 10:14 AM (GMT-06:00) To: [email protected] Subject: [HP-Agilent-Keysight-equipment] Looking for small fiber washers I'm in the process of repairing an Acton Labs VTVM.? The RANGE switch was a Centralab model with steatite wafers and someone had broken the wafers - some of which were in pieces that made gluing them back together somewhat impractical.? I have obtained glass-epoxy versions of those wafers and am reassembling the switch; however, the original damage was enough to destroy one of the tiny fiber washers that are used on the mounting strut assemblies. Does anyone know where I could get one (or, maybe, a few) of those?? I've searched the web and can't find them and the Electroswitch site (they bought Centralab) doesn't show them as available parts either.? If you're familiar with them, they accommodate a #4 machine screw on the ID but the OD is very small as well and all I can find are "standard" #4 fiber washers which are too large. I think these also are/were available in plastic or nylon and if there's a source for those, they would work as well. Sorry for the long email for such a small request but I don't know anywhere else to look for these. Thanks, Barry - N4BUQ
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Re: Looking for small fiber washers
Hi Joe,
I had looked there before and didn't find any whose OD was small enough; however I just looked again and they do have some fiberglass washers with an OD of 0.219" which might just be small enough. Thanks for the reply and a prompt for me to look again!
Barry - N4BUQ
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----- Original Message ----- From: "J. L. Trantham" <jltran@...>
To: [email protected]
Sent: Thursday, October 1, 2020 10:24:07 AM
Subject: Re: [HP-Agilent-Keysight-equipment] Looking for small fiber washers
Barry,
Have you tried McMaster Carr?
Good luck.
Joe
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of n4buq
Sent: Thursday, October 01, 2020 10:15 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Looking for small fiber washers
I'm in the process of repairing an Acton Labs VTVM. The RANGE switch was a
Centralab model with steatite wafers and someone had broken the wafers -
some of which were in pieces that made gluing them back together somewhat
impractical. I have obtained glass-epoxy versions of those wafers and am
reassembling the switch; however, the original damage was enough to destroy
one of the tiny fiber washers that are used on the mounting strut
assemblies.
Does anyone know where I could get one (or, maybe, a few) of those? I've
searched the web and can't find them and the Electroswitch site (they bought
Centralab) doesn't show them as available parts either. If you're familiar
with them, they accommodate a #4 machine screw on the ID but the OD is very
small as well and all I can find are "standard" #4 fiber washers which are
too large.
I think these also are/were available in plastic or nylon and if there's a
source for those, they would work as well.
Sorry for the long email for such a small request but I don't know anywhere
else to look for these.
Thanks,
Barry - N4BUQ
|
Re: Looking for small fiber washers
Barry,
Have you tried McMaster Carr?
Good luck.
Joe
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of n4buq Sent: Thursday, October 01, 2020 10:15 AM To: [email protected]Subject: [HP-Agilent-Keysight-equipment] Looking for small fiber washers I'm in the process of repairing an Acton Labs VTVM. The RANGE switch was a Centralab model with steatite wafers and someone had broken the wafers - some of which were in pieces that made gluing them back together somewhat impractical. I have obtained glass-epoxy versions of those wafers and am reassembling the switch; however, the original damage was enough to destroy one of the tiny fiber washers that are used on the mounting strut assemblies. Does anyone know where I could get one (or, maybe, a few) of those? I've searched the web and can't find them and the Electroswitch site (they bought Centralab) doesn't show them as available parts either. If you're familiar with them, they accommodate a #4 machine screw on the ID but the OD is very small as well and all I can find are "standard" #4 fiber washers which are too large. I think these also are/were available in plastic or nylon and if there's a source for those, they would work as well. Sorry for the long email for such a small request but I don't know anywhere else to look for these. Thanks, Barry - N4BUQ
|
Looking for small fiber washers
I'm in the process of repairing an Acton Labs VTVM. The RANGE switch was a Centralab model with steatite wafers and someone had broken the wafers - some of which were in pieces that made gluing them back together somewhat impractical. I have obtained glass-epoxy versions of those wafers and am reassembling the switch; however, the original damage was enough to destroy one of the tiny fiber washers that are used on the mounting strut assemblies.
Does anyone know where I could get one (or, maybe, a few) of those? I've searched the web and can't find them and the Electroswitch site (they bought Centralab) doesn't show them as available parts either. If you're familiar with them, they accommodate a #4 machine screw on the ID but the OD is very small as well and all I can find are "standard" #4 fiber washers which are too large.
I think these also are/were available in plastic or nylon and if there's a source for those, they would work as well.
Sorry for the long email for such a small request but I don't know anywhere else to look for these.
Thanks,
Barry - N4BUQ
|
Re: HP step attenuator repair
I can recommend ebay item number 254637752380; not affiliated.
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Re: Clarification : Brass gears for the 8640B
Of course you can send a PM via the groups.io website. You click on Reply and the then Press the Private button at the lower right of the page.
You can then compose your reply direct to the original sender of the post.
David
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Froggie the Gremlin Sent: 01 October 2020 10:36 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Clarification : Brass gears for the 8640B Ram I am also interested, have 3 generators! Please quote 1-3 sets. But I Cannot send you a PM, please contact me or reveal your email addr or website. Many thanks Jon
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Re: 3585A graticule question
since you don’t owe me any money, I’ll take that as a yes, glad to see you’re still among the living, what’s it been about 20 years ? still in Dallas ? ?
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From: [email protected] < [email protected]> On Behalf Of Richard Parrish Sent: Thursday, October 01, 2020 8:30 AM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] 3585A graticule question ?
you’re still alive ??? ? ? There was a CRT retrofit kit that Agilent came up with that replaced the graticuled CRT with a CRT w/o a graticulean .? 5 of the boards were changed where the XYZ amps were and the new boards generated an electronic graticule.? It looks like someone had a newer version CRT that went bad and replaced it with an older CRT that was handy. The newer CRTs were also used in the last versions of the 8566Bs also but with a different set of replacement boards.
I think you may have a hybrid made up of some A and B parts. I have no idea how that could be. Is the "CRT graticule" perhaps on the green filter glass insted of the CRT glass?
Vladan
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Re: 3585A graticule question
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you’re still alive ???
?
?
There was a CRT retrofit kit that Agilent came up with that replaced the graticuled CRT with a CRT w/o a graticulean .? 5 of the boards were changed where the XYZ amps were and the new boards generated an electronic
graticule.? It looks like someone had a newer version CRT that went bad and replaced it with an older CRT that was handy.
The newer CRTs were also used in the last versions of the 8566Bs also but with a different set of replacement boards.
I think you may have a hybrid made up of some A and B parts. I have no idea how that could be. Is the "CRT graticule" perhaps on the green filter glass insted of the CRT glass?
Vladan
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Re: malware messages, was Re: [HP-Agilent-Keysight-equipment] 8640B regeneration/retrofit, anyone interested?
On Wed, Sep 30, 2020 at 12:37 PM, Dave McGuire wrote: So you've verified from the mail headers that it came from
groups.io's outbound mail servers? Or are you only seeing the message
in the groups.io interface?
The phishing mail arrived via email as any "private" response to a topic would have been. So an email to have not only the rogue message but also to include my own previous post to the topic, the groups footer, etc, seems to clearly indicate that the message was sent directly from within the group, again by using the private reply function (the button to the extreme right side on the reply interface). It would be very unlikely that a random message was just sent to my email address from another email server outside of the group, and still contain all that information about the topic it is replying to. I still have all the received rogue emails, I can forward directly if you like to take a look at content, headers, etc. Problem is that nowadays most of that info can easily be obfuscated or spoofed, so I don't usually pay too much attention to those. My profile is set to receive a daily summary. Much easier to digest and I only visit the topics of interest from the links in the digest. Having to individually deal with each and every email arriving around the clock with each regular posting in the group would at least for me quickly get too much too deal with efficiently, even the way I automatically filter and organize my inbox into separate folders by relevance. Anyhow, at least on my end things seem to have quiet down, so for now will continue as-is without changing my email address. Thanks anyway for offering to expedite resubscribing me if changing it would have been necessary.
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Re: PSU Problems HP 8591A
I have two 8590B SAs and both had the same PSU fault.? The Power LEDs were illuminated and the voltages (as read by a DMM) were OK, but perhaps a bit on the low end of the tolerance band.? When examined with a 'scope, all had 100Hz ripple (I am in the UK).? This suggested the main PSU reservoir capacitors were faulty, and yes, in each SA one of the pair was open circuit. ? I don't know if the PSU in an 8591A is the same, but it's worth checking.? IIRC, the faulty capacitor in each SA had a 'domed' top. ? Replacing the pair in each SA cured the fault in both. ? Good luck! ? 73, Mike, Mike Stevens, G8CUL/M0CUL/F4VRB. ?
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From: [email protected] On Behalf Of Kuba Ober
Sent: 01 October 2020 13:15
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] PSU Problems HP 8591A? That may help a bit but in most cases switchers either work or they don’t. When they don’t, usually the whole thing equally doesn’t work since the outermost control loop has been broken. So nothing inside will have any signatures that would help much. So I think it’s just lore. These supplies don’t have large digits sections with signatures to begin with. Signature analyzers of that era worked on TTL inputs. They could help if you were fixing an Alto supply maybe, but for HP instruments - I highly doubt that. ?Nice description. You obviously you how these beasts work. ?For the novice, switchers are really hard to repair due to several control loops that are involved. ?Years ago, I read some techs were using HP signature analyzers to quickly diagnose switchers by using known signature points from a working model of the supply being repaired. ?Not sure if that method really works.
--
Regards, Bernie Murphy
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Re: PSU Problems HP 8591A
That may help a bit but in most cases switchers either work or they don’t. When they don’t, usually the whole thing equally doesn’t work since the outermost control loop has been broken. So nothing inside will have any signatures that would help much. So I think it’s just lore. These supplies don’t have large digits sections with signatures to begin with. Signature analyzers of that era worked on TTL inputs. They could help if you were fixing an Alto supply maybe, but for HP instruments - I highly doubt that.
Cheers, Kuba
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30 sep. 2020 kl. 9:52 em skrev Ham Radio <bernard.murphy@...>:
?Nice description. You obviously you how these beasts work. ?For the novice, switchers are really hard to repair due to several control loops that are involved. ?Years ago, I read some techs were using HP signature analyzers to quickly diagnose switchers by using known signature points from a working model of the supply being repaired. ?Not sure if that method really works.
--
Regards, Bernie Murphy
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Re: Clarification : Brass gears for the 8640B
Ram I am also interested, have 3 generators! Please quote 1-3 sets.
But I Cannot send you a PM, please contact me or reveal your email addr or website.
Many thanks
Jon
|
Re: Clarification : Brass gears for the 8640B
I would be interested too, please
?
73, Colin G4CWH
?
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From: [email protected] [mailto:[email protected]]
On Behalf Of Terry Harbin via groups.io
Sent: 01 October 2020 02:55
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Clarification : Brass gears for the 8640B
?
Paul,
I am needing 2 complete sets of gears for the 8640B. Are you still making these and could you give me a quote?
73 de Terry
AJ4EV
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Re: HP step attenuator repair
Alan,
The o-rings are about 1.0mm ID by 2.4mm OD.? They are sometimes available on eBay as watch crown gaskets.
--John Gord
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On Wed, Sep 30, 2020 at 07:00 PM, Frank S wrote:
I am looking for the gaskets “o ‘rings” for an electronic step attenuator. The attenuator is a 0805B-60118, but I was told they all use the same o ’rings. Keysight N/N is 5060-0342 is the push rod with them, or the old number was 0905-0969
Thanks
Frank
?
Light travels faster than sound. This is why some people appear bright until you hear them speak.
Alan Dundes
?
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Re: Clarification : Brass gears for the 8640B
Paul,
I am needing 2 complete sets of gears for the 8640B. Are you still making these and could you give me a quote?
73 de Terry
AJ4EV
|
HP step attenuator repair
I am looking for the gaskets “o ‘rings” for an electronic step attenuator. The attenuator is a 0805B-60118, but I was told they all use the same o ’rings. Keysight N/N is 5060-0342 is the push rod with them, or the old number was 0905-0969 Thanks Frank ? Light travels faster than sound. This is why some people appear bright until you hear them speak. Alan Dundes ?
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Re: PSU Problems HP 8591A
Nice description. You obviously you how these beasts work. ?For the novice, switchers are really hard to repair due to several control loops that are involved. ?Years ago, I read some techs were using HP signature analyzers to quickly diagnose switchers by using known signature points from a working model of the supply being repaired. ?Not sure if that method really works.
--
Regards, Bernie Murphy
|
David C. Partridge
Mike Vande Voort
Froggie the Gremlin