|
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 (https://www.amazon.com/gp/product/B005GSF1EG/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1). 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?).
|
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. ? ? ?
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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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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?).
|
Steve ? What’s the part number of your manual?? I’m going to have to locate a copy ? Thanks steve ?
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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?).
|
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?).
|
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
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-------- 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?).
|
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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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?).
|
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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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?).
|
I was still typing my response while you already answered, Orin :-)))
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-------- 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?).
|
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?
|
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?).
|
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?).
|
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?).
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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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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
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On Tue, Mar 19, 2019 at 07:17 PM, Joe / KN5U wrote:
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
Thanks Joe. I will look for another fan with better airflow characteristics. Of course, I could always go for a Papst fan with better noise characteristics.
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On Tue, Mar 19, 2019 at 07:22 PM, Joe / KN5U wrote:
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
The fan on my HP5335A is 24V, so I guess the modification you mention has already been applied.
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I added a low coil current 24V relay and grabbed 120VAC from elsewhere in the unit to power the AC fan.? To do so also allows a nice selection of a higher velocity fan if desired (and possibly lower noise level as opposed to the grinding noise of the DC fan).
Greg
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On Tue, Mar 19, 2019 at 07:22 PM, Joe / KN5U wrote:
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
I have looked extensively, but have not found a 24V fan with the necessary airflow specs that also had quieter operation than the fan already in the unit. You mention that you have done some mods to change the fan from 110V AC to 24 V DC. What fan did you use as the replacement and do you happen to know its airflow/noise specs? Thanks, Dan
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Dan,
The change occurred in the April 25, 1985 update:
"Change B1 from 3160-0209 to 3160-0450 FAN-24VDC, 36 CFM"
The closest I could find in today's market is the EBM Papst 8124G. This fan has a specification of:
35 (not 36) CFM
38 dBa
18 - 30 VDC.
I also found this fan in several 5335A counters installed at the factory by HP, so I figure it's the right one. I found some for about $22 in an online search.
The 8124K is the ball-bearing equivalent to the 8124G, which is sleeve bearing.
Hope that helps!
Regards,
Joe
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G?ran Krusell