Kevin,
Yes.? Look at measurement mode 1.4 in the manual (08970-90022).
The noise source operates at 144MHz while the 8970B looks at the 28MHz output.
--John Gord
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On Wed, Mar 20, 2019 at 10:26 AM, kevin kearns wrote:
I have a rf converter (144MHz to 28 MHz) can I use the 8970b to measure it's noise figure, how do I do it if possible?
Thanks
Kevin
|
I have a rf converter (144MHz to 28 MHz) can I use the 8970b to measure it's noise figure, how do I do it if possible?
Thanks
Kevin
|
Re: HP 8664A signal generator repairability
yes, it seems the SA is having an issue.?
you can center around those frequencies where the amplitude was way off with a small span and try to tune the preselector (peaking) on the SA and see how the amplitude is
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On Tue, Mar 19, 2019 at 06:33 PM, @0culus wrote:
On Tue, Mar 19, 2019 at 12:03 PM, @0culus wrote:
Here's some pics at 0 dBm. I have to toddle off to take care of some other things, so I'll do higher amplitude later. I'm starting to think there might be something off in the 2-22GHz band of my 8566A, looking at the sweeps of different spans. I can't do a full 0-3 GHz due to the way the 8566 bands are laid out.
I believe there might be an issue with the preselector in the upper band in the 8566A, so I'll need to look into it. It is very flat in the 0-2.5 band, so I'm inclined to think the signal generator is working fine. I'm testing narrowband CW in each synthesis band now to see if any spurs show up.
Sean
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Re: HP 8664A signal generator repairability
Are you sure about these measurements and about the SA?
If you look at 2.0-2.5GHz sections in pic #2 and pic #3 they look very different, why?
what happens if you center at 2.05GHz which looks very bad in pic #2 with a small span like 1MHz
or less?
do you get any amplitude error (which usually means ALC is unlocked) anywhere?
if the amplitude is that much off as I see in these pictures, the instrument must have?
given amplitude error and the amplitude must be unleveled UNLESS there is a problem
after the output amplifier in A7 (module 5). Which only means: connectors and rigid cables or the attenuator or the pulse modulator (option 008) if you have it or the RPP switch right at the end.
if something is wrong in those parts, the ALC loop will not see that. In that case the output of A7 must be OK if you measure it directly at the SMA connector on top of that board
one reason that I wanted the test at high amplitude like 13dBm was to eliminate all attenuator pads from the signal path
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On Tue, Mar 19, 2019 at 03:03 PM, @0culus wrote:
On Tue, Mar 19, 2019 at 05:00 AM, amirb wrote:
can you do a couple of? sweeps and post the pictures?
do a sweep of 8664A from let's say 1Mhz (or 10MHz) all the way up to 3GHz with say 10MHz steps and the dwell time
at each step a little larger than the sweep time of your SA
on your SA choose Max Hold for the trace and start from 1MHz to 3GHz and note the sweep time
let it run for a few sweeps and then take the picture.?
Do this once at a high amplitude like 13dBm (if you have option 008 pulse mod, then the highest amp must be below 9dBm) and once at a lower amplitude like 0dBm?
Here's some pics at 0 dBm. I have to toddle off to take care of some other things, so I'll do higher amplitude later. I'm starting to think there might be something off in the 2-22GHz band of my 8566A, looking at the sweeps of different spans. I can't do a full 0-3 GHz due to the way the 8566 bands are laid out.
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Re: My $25 "In Poor Shape" 3468A has arrived
Hi Steve, the jumper cable is maybe 1 inch long -the most. There is a picture of the jumper in my gallery, along with the readings.
But the main issue is that both the resistance readings are negative. Thanks.
|
Re: HP5335A fan replacement
By the way, the original fan was 120 VAC, but repair note changed the fan to 24 VDC. This was precipitated by the power supply relay and socket overheating. The repair note had a description of a circuit mod using a diode and also replacing the fan and socket. I have done a few of these mods and this a fairly simple fix. Let me know if you need a copy of the change.
Joe, KN5U
|
Re: HP5335A fan replacement
Dan,
This is a great question. My experience is that the critical parts for cooling consideration are the input amplifier U3 and U4 (Schmitt amplifier). These are highly susceptible to shortened life due to heating. Of the 200+ units I have refurbished, interestingly, those that had underpowered fan replacements also had one or both Schmitt amplifier chips not working. So my suggestion is to replace the fan with one of the proper air flow. Especially considering that the Schmitt amplifiers are no longer available.
Regards,
Joe, KN5U
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For Sale: E4402B and 8644B
Hi Group.
I've put two items up for sale on Ebay. Both are working "perfectly" and are in great condition.
The 8644B is really nice! I'd love to keep it but it's SO big and heavy. But really is nice. I like the
dual audio generator feature. Great for IM measurements on transmitters, amplifiers and such.
Please let me know if you are interested. Not inexpensive as they cost a bit prior to repairing them.
Cheers!
Mark in Oregon
|
Re: HP5335A fan replacement
The DC fan wasn’t shown in my manual, it was in my parts unit.? Steve
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On Mar 19, 2019, at 5:13 PM, Stephen Hanselman < kc4sw.io@...> wrote:
Gotta love HP, I can’t find that in my manual.? Page number? Thanks steve ? ? I have the same manual as you but I looked in y parts unit and it has the DC fan.?
On Mar 19, 2019, at 4:44 PM, Stephen Hanselman <kc4sw.io@...> wrote:
Steve ? What’s the part number of your manual?? I’m going to have to locate a copy ? Thanks steve ? ? Mine says 18-30vdc...
On Mar 19, 2019, at 4:02 PM, Stephen Hanselman <kc4sw.io@...> wrote:
Dan, ? That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans. ? Might want to check again, on the other hand there may be a different version we have not seen that is DC. ? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile s.hanselman@... a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments. ? ? ? From: [email protected] <[email protected]> On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua, NF-R8 (), but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon (). The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst. From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
|
Re: HP 8664A signal generator repairability
On Tue, Mar 19, 2019 at 12:03 PM, @0culus wrote:
Here's some pics at 0 dBm. I have to toddle off to take care of some other things, so I'll do higher amplitude later. I'm starting to think there might be something off in the 2-22GHz band of my 8566A, looking at the sweeps of different spans. I can't do a full 0-3 GHz due to the way the 8566 bands are laid out.
I believe there might be an issue with the preselector in the upper band in the 8566A, so I'll need to look into it. It is very flat in the 0-2.5 band, so I'm inclined to think the signal generator is working fine. I'm testing narrowband CW in each synthesis band now to see if any spurs show up. Sean
|
Re: HP5335A fan replacement
Gotta love HP, I can’t find that in my manual.? Page number? Thanks steve ?
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From: [email protected] < [email protected]> On Behalf Of Steve - Home Sent: Tuesday, March 19, 2019 2:53 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I have the same manual as you but I looked in y parts unit and it has the DC fan.?
On Mar 19, 2019, at 4:44 PM, Stephen Hanselman <kc4sw.io@...> wrote:
Steve ? What’s the part number of your manual?? I’m going to have to locate a copy ? Thanks steve ? ? Mine says 18-30vdc...
On Mar 19, 2019, at 4:02 PM, Stephen Hanselman <kc4sw.io@...> wrote:
Dan, ? That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans. ? Might want to check again, on the other hand there may be a different version we have not seen that is DC. ? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile s.hanselman@... a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments. ? ? ? From: [email protected] <[email protected]> On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua, NF-R8 (), but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon (). The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst. From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
|
Re: HP5335A fan replacement
I tried to post a reply to your blog but didn’t want to start an account. ? On 29sep16 “1980s_john” posted a picture of a small piece of metal that dropped out of his unit.? It is a spring for one of the front panel switches.? They drop out all the time and are easily put back in place ? steve ? ?
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From: [email protected] <[email protected]> On Behalf Of Orin Eman
Sent: Tuesday, March 19, 2019 2:46 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? There was a change to a DC fan as well as a re-wiring of the relay and replacement of the relay and socket. See the service note attached to my post here: ? On Tue, Mar 19, 2019 at 2:02 PM Stephen Hanselman <kc4sw.io@...> wrote: Dan, ? That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans. ? Might want to check again, on the other hand there may be a different version we have not seen that is DC. ? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile s.hanselman@... a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments. ? ? ? From: [email protected] <[email protected]> On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua, NF-R8 (), but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon (). The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst. From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
|
Re: HP5335A fan replacement
Hi, my HP5335A counter produced a very disturbing fan noise, I could not stand it, I can?t think. I made a small circuit board with 10 series resistors of 15 ohm, 0.25 W and placed them in series with the DC fan. This reduced the speed and the noise level substantially. Another successful project...
G?ran?
|
Re: HP5335A fan replacement
I was still typing my response while you already answered, Orin :-)))
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Show quoted text
-------- Original message --------
From: Orin Eman <orin.eman@...>
Date: 3/19/19 22:49 (GMT+01:00)
Subject: Re: [HP-Agilent-Keysight-equipment] HP5335A fan replacement
There was a change to a DC fan as well as a re-wiring of the relay and replacement of the relay and socket.
See the service note attached to my post here:
On Tue, Mar 19, 2019 at 2:02 PM Stephen Hanselman < kc4sw.io@...> wrote:
Dan,
?
That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans.
?
Might want to check again, on the other hand there may be a different version we have not seen that is DC.
?
Regards,
?
Stephen Hanselman
Datagate Systems, LLC
3107 North Deer Run Road #24
Carson City, Nevada, 89701
(775) 882-5117 office
(775) 720-6020 mobile
s.hanselman@...
a Service Disabled, Veteran Owned Small Business
DISCLAIMER:
This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the
intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts
of this e-mail and any attachments.
?
?
?
From:
[email protected] <[email protected]>
On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To:
[email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement
?
I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua,
NF-R8 (),
but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon ().
The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst.
From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
|
Re: HP5335A fan replacement
I have the same manual as you but I looked in y parts unit and it has the DC fan.? Steve
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Show quoted text
On Mar 19, 2019, at 4:44 PM, Stephen Hanselman < kc4sw.io@...> wrote:
Steve ? What’s the part number of your manual?? I’m going to have to locate a copy ? Thanks steve ? ? Mine says 18-30vdc...
On Mar 19, 2019, at 4:02 PM, Stephen Hanselman <kc4sw.io@...> wrote:
Dan, ? That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans. ? Might want to check again, on the other hand there may be a different version we have not seen that is DC. ? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile s.hanselman@... a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments. ? ? ? From: [email protected] <[email protected]> On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua, NF-R8 (), but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon (). The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst. From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
|
Re: HP5335A fan replacement
Thanks!!, ? We did not have that service note, and really should have! ? We support something north of 50 of these and switching to the DC fan would be a good reliability upgrade ? Steve ?
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Show quoted text
From: [email protected] <[email protected]> On Behalf Of Orin Eman
Sent: Tuesday, March 19, 2019 2:46 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? There was a change to a DC fan as well as a re-wiring of the relay and replacement of the relay and socket. See the service note attached to my post here: ? On Tue, Mar 19, 2019 at 2:02 PM Stephen Hanselman <kc4sw.io@...> wrote: Dan, ? That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans. ? Might want to check again, on the other hand there may be a different version we have not seen that is DC. ? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile s.hanselman@... a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments. ? ? ? From: [email protected] <[email protected]> On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua, NF-R8 (), but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon (). The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst. From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
|
Re: HP5335A fan replacement
There are indeed different voltage versions of the fan. I remember that there was a service note for the 5335A which recommended to replace the original 115VAC fan by a DC fan. This had something to do with the relay.
Link to the service note:
https://hb9fsx.ch/nextcloud/s/PyLBcewPjw67YCc
Tobias
HB9FSX
toggle quoted message
Show quoted text
-------- Original message --------
From: Steve - Home <steve-krull@...>
Date: 3/19/19 22:34 (GMT+01:00)
Subject: Re: [HP-Agilent-Keysight-equipment] HP5335A fan replacement
Mine says 18-30vdc...
On Mar 19, 2019, at 4:02 PM, Stephen Hanselman < kc4sw.io@...> wrote:
Dan,
?
That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans.
?
Might want to check again, on the other hand there may be a different version we have not seen that is DC.
?
Regards,
?
Stephen Hanselman
Datagate Systems, LLC
3107 North Deer Run Road #24
Carson City, Nevada, 89701
(775) 882-5117 office
(775) 720-6020 mobile
s.hanselman@...
a Service Disabled, Veteran Owned Small Business
DISCLAIMER:
This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not
the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts
of this e-mail and any attachments.
?
?
?
From:
[email protected] <[email protected]>
On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement
?
I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua,
NF-R8 (),
but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon ().
The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst.
From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
|
Re: HP5335A fan replacement
There was a change to a DC fan as well as a re-wiring of the relay and replacement of the relay and socket.
See the service note attached to my post here:
On Tue, Mar 19, 2019 at 2:02 PM Stephen Hanselman < kc4sw.io@...> wrote:
Dan, ? That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans. ? Might want to check again, on the other hand there may be a different version we have not seen that is DC. ? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile s.hanselman@...
a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments. ? ? ? From: [email protected] <[email protected]> On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua, NF-R8 (), but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon (). The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst. From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
|
Re: HP5335A fan replacement
Steve ? What’s the part number of your manual?? I’m going to have to locate a copy ? Thanks steve ?
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Show quoted text
From: [email protected] < [email protected]> On Behalf Of Steve - Home Sent: Tuesday, March 19, 2019 2:32 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? Mine says 18-30vdc...
On Mar 19, 2019, at 4:02 PM, Stephen Hanselman <kc4sw.io@...> wrote:
Dan, ? That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans. ? Might want to check again, on the other hand there may be a different version we have not seen that is DC. ? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile s.hanselman@... a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments. ? ? ? From: [email protected] <[email protected]> On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua, NF-R8 (), but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon (). The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst. From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
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Re: HP5335A fan replacement
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On Mar 19, 2019, at 4:02 PM, Stephen Hanselman < kc4sw.io@...> wrote:
Dan, ? That’s interesting, according to my manual (05335-90021 4th ed, Aug 1988) the fan is a 3160-0209 32CFM 105-125V 50/60Hz.? We’ve fixed several of these and they have all had AC fans. ? Might want to check again, on the other hand there may be a different version we have not seen that is DC. ? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile s.hanselman@... a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments. ? ? ? From: [email protected] <[email protected]> On Behalf Of Dan Nessett via Groups.Io
Sent: Tuesday, March 19, 2019 1:19 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5335A fan replacement ? I want to replace the fan in a used HP5335A, which is very noisy. I Googled this topic and did not find anything here, but found a suggestion on the EEVBlog. One poster suggested using a?Noctua, NF-R8 (), but this is a 12V fan and my HP5335A fan is powered by 24V.
So, I bought a Evercool 24V fan from Amazon (). The specs for the?Pabst fan that comes with the HP5335A are:?34 dBA, 61 m3/hour. The specs for the Evercool fan are: 28 dBA, 55 m3/hour. So, the Evercool is a bit underpowered, but considerably quieter than the?Papst. From what I have read the?Papst fan is a bit?over spec'd in?terms of airflow, so I thought the Evercool fan might work fine.
Does anyone have reasons why the Evercool would not be a good replacement fan? (Joe, KN5U - any comments?).
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G?ran Krusell