Re: [Flexradio] noisy fan
Tim, Thanks for trying to verify my findings. I am going to make a recording with fan off and on and send it to Flex-Radio´s trouble shooters for evaluation. Best 73 es tks agn Willi - Original Message - From: "Tim Ellison" <[EMAIL PROTECTED]> To: "Tim Ellison" <[EMAIL PROTECTED]>; "Willi Reppel" <[EMAIL PROTECTED]>; "Bill Nagle" <[EMAIL PROTECTED]>; Sent: Saturday, May 27, 2006 11:15 PM Subject: RE: [Flexradio] noisy fan Willi, I just ran a few tests to see if I observe the same 20dB electrical noise emanating from the cooling fan that you are seeing on 15 meters. With Paul's W1GHZ thermostatically controlled fan controller installed, I do not see or hear any noise that can be attributed to the fan. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tim Ellison Sent: Thursday, May 25, 2006 1:21 PM To: Willi Reppel; Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Oh. I see. I will check to see if the fan controller I am using provides any noise electronic filtering -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: Willi Reppel [mailto:[EMAIL PROTECTED] Sent: Thursday, May 25, 2006 11:47 AM To: Tim Ellison; Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Tim, Thanks again for your suggestion which I carried out a long time ago. It remains to do something about the electrical noise of the fan. I see 20 dBm of noise spred out over the lower sideband in the 15 m band which disappears when disconnecting the fan. While the purist argue about 1/f noise and freezing of the SDR-1000 to 0 K to reduce thermic noise, I am looking for a engi-neering change order (ECO) to get rid of the more substantial electric fan noise. Best 73 Willi - Original Message - From: "Tim Ellison" <[EMAIL PROTECTED]> To: "Willi Reppel" <[EMAIL PROTECTED]>; "Bill Nagle" <[EMAIL PROTECTED]>; Sent: Tuesday, May 23, 2006 8:50 PM Subject: RE: [Flexradio] noisy fan Yep, That was me who reported it. There is a little too much back pressure generated between the fan and the vents. You can trace a nice octagon around the air intake holes by drawing tangents on the existing holes. 5 minutes with a Dremel tool and a cutting wheel and you are in business. -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Willi Reppel Sent: Tuesday, May 23, 2006 2:34 PM To: Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Bill, Many months ago somebody suggested on the forum to make a large opening in the cabinet wall behind the fan instead of letting the cooling air pass through many small holes. The OM reported a sub-stantial noise reduction and mentioned that the small holes in the cabinet together with the adjacent fanwheel create a whining sound like a siren . Willi - Original Message - From: "Bill Nagle" <[EMAIL PROTECTED]> To: Sent: Tuesday, May 23, 2006 6:14 PM Subject: [Flexradio] noisy fan > Does anyone have a suggestion as to quiet the fan noise on the sdr1000? > Perhaps slowing it down a bit with a series resistor? > > > Bill Nagle > > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Willi, I just ran a few tests to see if I observe the same 20dB electrical noise emanating from the cooling fan that you are seeing on 15 meters. With Paul's W1GHZ thermostatically controlled fan controller installed, I do not see or hear any noise that can be attributed to the fan. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tim Ellison Sent: Thursday, May 25, 2006 1:21 PM To: Willi Reppel; Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Oh. I see. I will check to see if the fan controller I am using provides any noise electronic filtering -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: Willi Reppel [mailto:[EMAIL PROTECTED] Sent: Thursday, May 25, 2006 11:47 AM To: Tim Ellison; Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Tim, Thanks again for your suggestion which I carried out a long time ago. It remains to do something about the electrical noise of the fan. I see 20 dBm of noise spred out over the lower sideband in the 15 m band which disappears when disconnecting the fan. While the purist argue about 1/f noise and freezing of the SDR-1000 to 0 K to reduce thermic noise, I am looking for a engi-neering change order (ECO) to get rid of the more substantial electric fan noise. Best 73 Willi - Original Message - From: "Tim Ellison" <[EMAIL PROTECTED]> To: "Willi Reppel" <[EMAIL PROTECTED]>; "Bill Nagle" <[EMAIL PROTECTED]>; Sent: Tuesday, May 23, 2006 8:50 PM Subject: RE: [Flexradio] noisy fan Yep, That was me who reported it. There is a little too much back pressure generated between the fan and the vents. You can trace a nice octagon around the air intake holes by drawing tangents on the existing holes. 5 minutes with a Dremel tool and a cutting wheel and you are in business. -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Willi Reppel Sent: Tuesday, May 23, 2006 2:34 PM To: Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Bill, Many months ago somebody suggested on the forum to make a large opening in the cabinet wall behind the fan instead of letting the cooling air pass through many small holes. The OM reported a sub-stantial noise reduction and mentioned that the small holes in the cabinet together with the adjacent fanwheel create a whining sound like a siren . Willi - Original Message ----- From: "Bill Nagle" <[EMAIL PROTECTED]> To: Sent: Tuesday, May 23, 2006 6:14 PM Subject: [Flexradio] noisy fan > Does anyone have a suggestion as to quiet the fan noise on the sdr1000? > Perhaps slowing it down a bit with a series resistor? > > > Bill Nagle > > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Joe, This only works for enclosures that have the fan mounted inside. Yes, you place another filter spacer inside the box between the front panel and the fan. You can cut out the grill with wire cutters before installing. Longer screws will be required. The Digikey part number is: CR212-ND. I am sure that an equivalent could be found as well. Gerald Youngblood, K5SDR FlexRadio Systems Ph: 512-535-5266 Fax: 512-233-5143 Email: [EMAIL PROTECTED] Web: www.flex-radio.com > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Joe - AB1DO > Sent: Thursday, May 25, 2006 9:36 AM > To: FlexRadio@flex-radio.biz > Subject: Re: [Flexradio] noisy fan > > Gerald, > > forgive my ignorance, but just to clarify: if I break down my > fan from the front to the front panel I have respectively the > filter holder/cap, the filter, the filter spacer and then the > fan. Are you saying that you just place another filter > spacer, without filter and filter holder, on the inside of > the front panel as well? I haven't looked lately, but is > there room enough for this between the inside of the front > panel and the heat sink of the PA? > > 73 de Joe - AB1DO > > Gerald Youngblood wrote: > > > > Hello all, > > > > Please note that all current production radios use a spacer between > > the fan and the inside front panel. This is made from the > same filter > > spacer that is used on the front panel. This reduces fan > noise power > > by 50% (3dB) as measured 2 inches from the front panel. > > > > 73, > > Gerald > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Tim, Willi,
I have had a lot of problems with a fancontroler oscilating wildly,
covering the FMbroadcast, Airband and the lower TV channels
with a collectormotor like noise. Swapping the contoler solved
the problem.
73 peter pa0pvn
-Oorspronkelijk bericht-
Van: [EMAIL PROTECTED] namens Tim Ellison
Verzonden: do 25-5-2006 19:21
Aan: Willi Reppel; Bill Nagle; FlexRadio@flex-radio.biz
CC:
Onderwerp: Re: [Flexradio] noisy fan
Oh. I see. I will check to see if the fan controller I am using
provides any noise electronic filtering
-Tim
---
Integrated Technical Services
"Whoa-oh, Smokestack Lightning, shining just like gold.
Why can't you hear me crying.
Whoa-oh, stop your train, let a hobo ride.
Why can't you hear me crying. "
--Howling Wolf
-Original Message-
From: Willi Reppel [mailto:[EMAIL PROTECTED]
Sent: Thursday, May 25, 2006 11:47 AM
To: Tim Ellison; Bill Nagle; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] noisy fan
Tim,
Thanks again for your suggestion which I carried out a long time ago.
It remains to do something about the electrical noise of the fan. I see
20 dBm of noise spred out over the lower sideband in the 15 m band which
disappears when disconnecting the fan. While the purist argue about 1/f
noise and freezing of the SDR-1000 to 0 K to reduce thermic noise, I am
looking for a engi-neering change order (ECO) to get rid of the more
substantial electric fan noise.
Best 73
Willi
- Original Message -
From: "Tim Ellison" <[EMAIL PROTECTED]>
To: "Willi Reppel" <[EMAIL PROTECTED]>; "Bill Nagle" <[EMAIL
PROTECTED]>;
Sent: Tuesday, May 23, 2006 8:50 PM
Subject: RE: [Flexradio] noisy fan
Yep, That was me who reported it. There is a little too much back
pressure generated between the fan and the vents. You can trace a nice
octagon around the air intake holes by drawing tangents on the existing
holes.
5 minutes with a Dremel tool and a cutting wheel and you are in
business.
-Tim
---
Integrated Technical Services
"Whoa-oh, Smokestack Lightning, shining just like gold.
Why can't you hear me crying.
Whoa-oh, stop your train, let a hobo ride.
Why can't you hear me crying. "
--Howling Wolf
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Willi Reppel
Sent: Tuesday, May 23, 2006 2:34 PM
To: Bill Nagle; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] noisy fan
Bill,
Many months ago somebody suggested on the forum to make a large opening
in the cabinet wall behind the fan instead of letting the cooling air
pass through many small holes. The OM reported a sub-stantial noise
reduction and mentioned that the small holes in the cabinet together
with the adjacent fanwheel create a whining sound like a siren .
Willi
- Original Message -
From: "Bill Nagle" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, May 23, 2006 6:14 PM
Subject: [Flexradio] noisy fan
> Does anyone have a suggestion as to quiet the fan noise on the
sdr1000?
> Perhaps slowing it down a bit with a series resistor?
>
>
> Bill Nagle
>
>
>
> ___
> FlexRadio mailing list
> FlexRadio@flex-radio.biz
> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
> Archive Link:
> http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/
> FlexRadio Homepage: http://www.flex-radio.com
>
___
FlexRadio mailing list
FlexRadio@flex-radio.biz
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archive Link:
http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/
FlexRadio Homepage: http://www.flex-radio.com
___
FlexRadio mailing list
FlexRadio@flex-radio.biz
http://mail.flex-radio.biz/mailman/listinfo/flexradio_fl
Re: [Flexradio] noisy fan
Oh. I see. I will check to see if the fan controller I am using provides any noise electronic filtering -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: Willi Reppel [mailto:[EMAIL PROTECTED] Sent: Thursday, May 25, 2006 11:47 AM To: Tim Ellison; Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Tim, Thanks again for your suggestion which I carried out a long time ago. It remains to do something about the electrical noise of the fan. I see 20 dBm of noise spred out over the lower sideband in the 15 m band which disappears when disconnecting the fan. While the purist argue about 1/f noise and freezing of the SDR-1000 to 0 K to reduce thermic noise, I am looking for a engi-neering change order (ECO) to get rid of the more substantial electric fan noise. Best 73 Willi - Original Message - From: "Tim Ellison" <[EMAIL PROTECTED]> To: "Willi Reppel" <[EMAIL PROTECTED]>; "Bill Nagle" <[EMAIL PROTECTED]>; Sent: Tuesday, May 23, 2006 8:50 PM Subject: RE: [Flexradio] noisy fan Yep, That was me who reported it. There is a little too much back pressure generated between the fan and the vents. You can trace a nice octagon around the air intake holes by drawing tangents on the existing holes. 5 minutes with a Dremel tool and a cutting wheel and you are in business. -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Willi Reppel Sent: Tuesday, May 23, 2006 2:34 PM To: Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Bill, Many months ago somebody suggested on the forum to make a large opening in the cabinet wall behind the fan instead of letting the cooling air pass through many small holes. The OM reported a sub-stantial noise reduction and mentioned that the small holes in the cabinet together with the adjacent fanwheel create a whining sound like a siren . Willi - Original Message - From: "Bill Nagle" <[EMAIL PROTECTED]> To: Sent: Tuesday, May 23, 2006 6:14 PM Subject: [Flexradio] noisy fan > Does anyone have a suggestion as to quiet the fan noise on the sdr1000? > Perhaps slowing it down a bit with a series resistor? > > > Bill Nagle > > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Tim, Thanks again for your suggestion which I carried out a long time ago. It remains to do something about the electrical noise of the fan. I see 20 dBm of noise spred out over the lower sideband in the 15 m band which disappears when disconnecting the fan. While the purist argue about 1/f noise and freezing of the SDR-1000 to 0 K to reduce thermic noise, I am looking for a engi-neering change order (ECO) to get rid of the more substantial electric fan noise. Best 73 Willi - Original Message - From: "Tim Ellison" <[EMAIL PROTECTED]> To: "Willi Reppel" <[EMAIL PROTECTED]>; "Bill Nagle" <[EMAIL PROTECTED]>; Sent: Tuesday, May 23, 2006 8:50 PM Subject: RE: [Flexradio] noisy fan Yep, That was me who reported it. There is a little too much back pressure generated between the fan and the vents. You can trace a nice octagon around the air intake holes by drawing tangents on the existing holes. 5 minutes with a Dremel tool and a cutting wheel and you are in business. -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Willi Reppel Sent: Tuesday, May 23, 2006 2:34 PM To: Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Bill, Many months ago somebody suggested on the forum to make a large opening in the cabinet wall behind the fan instead of letting the cooling air pass through many small holes. The OM reported a sub-stantial noise reduction and mentioned that the small holes in the cabinet together with the adjacent fanwheel create a whining sound like a siren . Willi - Original Message - From: "Bill Nagle" <[EMAIL PROTECTED]> To: Sent: Tuesday, May 23, 2006 6:14 PM Subject: [Flexradio] noisy fan > Does anyone have a suggestion as to quiet the fan noise on the sdr1000? > Perhaps slowing it down a bit with a series resistor? > > > Bill Nagle > > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Gerald, forgive my ignorance, but just to clarify: if I break down my fan from the front to the front panel I have respectively the filter holder/cap, the filter, the filter spacer and then the fan. Are you saying that you just place another filter spacer, without filter and filter holder, on the inside of the front panel as well? I haven't looked lately, but is there room enough for this between the inside of the front panel and the heat sink of the PA? 73 de Joe - AB1DO Gerald Youngblood wrote: > Hello all, > > Please note that all current production radios use a spacer between the > fan > and the inside front panel. This is made from the same filter spacer that > is used on the front panel. This reduces fan noise power by 50% (3dB) as > measured 2 inches from the front panel. > > 73, > Gerald ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Hello all, Please note that all current production radios use a spacer between the fan and the inside front panel. This is made from the same filter spacer that is used on the front panel. This reduces fan noise power by 50% (3dB) as measured 2 inches from the front panel. 73, Gerald Gerald Youngblood, K5SDR FlexRadio Systems Ph: 512-535-5266 Fax: 512-233-5143 Email: [EMAIL PROTECTED] Web: www.flex-radio.com > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Willi Reppel > Sent: Tuesday, May 23, 2006 1:34 PM > To: Bill Nagle; FlexRadio@flex-radio.biz > Subject: Re: [Flexradio] noisy fan > > Bill, > > Many months ago somebody suggested on the forum to make a > large opening in the cabinet wall behind the fan instead of > letting the cooling air pass through many small holes. The OM > reported a sub-stantial noise reduction and mentioned that > the small holes in the cabinet together with the adjacent > fanwheel create a whining sound like a siren . > > Willi > - Original Message - > From: "Bill Nagle" <[EMAIL PROTECTED]> > To: > Sent: Tuesday, May 23, 2006 6:14 PM > Subject: [Flexradio] noisy fan > > > > Does anyone have a suggestion as to quiet the fan noise on > the sdr1000? > > Perhaps slowing it down a bit with a series resistor? > > > > > > Bill Nagle > > > > > > > > ___ > > FlexRadio mailing list > > FlexRadio@flex-radio.biz > > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > > Archive Link: > > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > > FlexRadio Homepage: http://www.flex-radio.com > > > > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Yep, That was me who reported it. There is a little too much back pressure generated between the fan and the vents. You can trace a nice octagon around the air intake holes by drawing tangents on the existing holes. 5 minutes with a Dremel tool and a cutting wheel and you are in business. -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Willi Reppel Sent: Tuesday, May 23, 2006 2:34 PM To: Bill Nagle; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] noisy fan Bill, Many months ago somebody suggested on the forum to make a large opening in the cabinet wall behind the fan instead of letting the cooling air pass through many small holes. The OM reported a sub-stantial noise reduction and mentioned that the small holes in the cabinet together with the adjacent fanwheel create a whining sound like a siren . Willi - Original Message - From: "Bill Nagle" <[EMAIL PROTECTED]> To: Sent: Tuesday, May 23, 2006 6:14 PM Subject: [Flexradio] noisy fan > Does anyone have a suggestion as to quiet the fan noise on the sdr1000? > Perhaps slowing it down a bit with a series resistor? > > > Bill Nagle > > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Bill, Many months ago somebody suggested on the forum to make a large opening in the cabinet wall behind the fan instead of letting the cooling air pass through many small holes. The OM reported a sub-stantial noise reduction and mentioned that the small holes in the cabinet together with the adjacent fanwheel create a whining sound like a siren . Willi - Original Message - From: "Bill Nagle" <[EMAIL PROTECTED]> To: Sent: Tuesday, May 23, 2006 6:14 PM Subject: [Flexradio] noisy fan > Does anyone have a suggestion as to quiet the fan noise on the sdr1000? > Perhaps slowing it down a bit with a series resistor? > > > Bill Nagle > > > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
Just one comment; I hardly even hear my fan! Lot more things in the shack worry me like the Henry 3K's fan. The SDR muffin fan on mine is far less noise than the one in my power supply. w5ami On 5/23/06, Lee A Crocker <[EMAIL PROTECTED]> wrote: > If you join the yahoo group I have posted there under > "photos" a schematic and circuit I developed that > works nicely > > You may have to down load the pic and blow it up a > little by right clicking and using the "save picture > as" feature > > > 73 W9OY > > > __ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > ___ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
[Flexradio] noisy fan
If you join the yahoo group I have posted there under "photos" a schematic and circuit I developed that works nicely You may have to down load the pic and blow it up a little by right clicking and using the "save picture as" feature 73 W9OY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] noisy fan
I used W1GHZ's thermostatically controlled fan controller and mounted it inside the SDR with the temperature sensor mounted on the PA heat sink. http://www.w1ghz.org/small_proj/small_proj.htm -Tim --- Integrated Technical Services "Whoa-oh, Smokestack Lightning, shining just like gold. Why can't you hear me crying. Whoa-oh, stop your train, let a hobo ride. Why can't you hear me crying. " --Howling Wolf -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Nagle Sent: Tuesday, May 23, 2006 12:15 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] noisy fan Does anyone have a suggestion as to quiet the fan noise on the sdr1000? Perhaps slowing it down a bit with a series resistor? Bill Nagle ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
[Flexradio] noisy fan
Does anyone have a suggestion as to quiet the fan noise on the sdr1000? Perhaps slowing it down a bit with a series resistor? Bill Nagle ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
