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 FT-991A Fan mod

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4 posters
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Alan Pilot
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Alan Pilot


Call Sign : 163-CT-220...MW7TTA
Posts : 2493
Times Thanked : 69
Join date : 2019-11-19
QTH or Location : Anglesey North Wales
Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+.
Age : 150

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PostSubject: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeMon Apr 04, 2022 7:25 am

Anybody done this mod recommend a replacement fan. (60x25)..
The one i see mentioned a Sun?????? is not available well i can't find one to buy in the uk.
Any help.
Thanks.
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Victor
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Victor


Call Sign : 26-CT-3228 / M7VIC
Posts : 5639
Times Thanked : 349
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeMon Apr 04, 2022 10:24 am

I'd watch yourself Alan mate.

Too many of these fan 'mods' do specify quieter units but usually it's because they run slower, move less air or can't keep up any air pressure. I'd rather have a slightly 'noisy' fan than a rig running too hot!

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Alan Pilot
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Alan Pilot


Call Sign : 163-CT-220...MW7TTA
Posts : 2493
Times Thanked : 69
Join date : 2019-11-19
QTH or Location : Anglesey North Wales
Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+.
Age : 150

FT-991A Fan mod Empty
PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeMon Apr 04, 2022 4:26 pm

Thanks Victor.
Have looked into this a lot but the fan recommended is unavailable.
The mod on the Icom recommends the Noctua and i have done that one and it runs cool and silent.
I did buy the same in a 60mm for the Yaesu but then read it was not recommended as it had a lower airflow cm ?? so that one is hanging on the wall.
Thought somebody might have found a good fan for replacing the Yaesu one.

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Victor
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Victor


Call Sign : 26-CT-3228 / M7VIC
Posts : 5639
Times Thanked : 349
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeTue Apr 05, 2022 7:10 am

No worries Alan mate.

I've seen the Noctua fans mentioned a lot but a quick check of the specs shows that they are slower and push less air than the Panasonic OEM unit. Bolting two together definitely doesn't guarantee better airflow or give better noise reduction. Wink

I've never got the 'noisy' fan issues unless your OEM unit is knackered, (a new unit of the same type can be surprisingly quieter). Similarly when a friend complained of fan noise I suggested he moved his rig away from the wall which shocked him of how much quieter it then seemed!

The main issues I've heard of is when a 'super-duper' new desk or boom mic is used and suddenly (?) picks up the fan noise. Usually you can hear the missus in another part of the house watching TV too with such mic setups and the proverbial 'dog farting' or stomach churns of the the op over the QSO. Very Happy

Not that 'other' house noise should be an issue in your spangly new shack mate but being wood you might be getting a bit of vibration. I keep a bit of carpet tile handy for such things and have a useful cut off beneath my tower PC to quieten that down.


Anyway, I hope you get sorted. FT-991A Fan mod 1f44d
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43CT016
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43CT016


Call Sign : 43-CT-016
Posts : 352
Times Thanked : 22
Join date : 2019-11-17
QTH or Location : Perth
Equipment Used : iCom IC-7610/IC-9700/IC-705
Age : 54

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PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeTue Apr 05, 2022 7:42 am

Alan Pilot wrote:
The mod on the Icom recommends the Noctua and i have done that one and it runs cool and silent.

Yep, used that on my ID-880H, and will likely do the 7300 and 9700 too when they're out of warranty.  Strangely, the 7610 doesn't seem half as bad as the other two.
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Alan Pilot
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Alan Pilot


Call Sign : 163-CT-220...MW7TTA
Posts : 2493
Times Thanked : 69
Join date : 2019-11-19
QTH or Location : Anglesey North Wales
Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+.
Age : 150

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PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeTue Apr 05, 2022 8:16 am

The fan on the 991a is not that noise but i can hear it plus as it warms up it gets faster and hear it more.
I did manage to find one of the Sunon but not the exact same part number.
The power is slightly less at 1.47w witch is a plus and airflow is 39.9 so higher than the stock fan at 27m3/h so i will try it out first before fitting for sound lol.
Just checked tracking and looks like tomorrow so i will report back.

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Northern Crusader
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Call Sign : M0GVZ / 26CT1760
Posts : 523
Times Thanked : 35
Join date : 2019-11-13
QTH or Location : IO94SA
Equipment Used : Icom 7300, TS480, President McKinley, Albrecht AE6110, CRT Mike
Age : 53

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PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeWed Apr 06, 2022 5:37 pm

QuietPC.com have loads of different sized quiet fans and they show the full specs so show the CFM of air it will shift as well as the noise level in dB. Find out the CFM rating of the original fan and have a look to see what they offer that's the same or higher.

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Alan Pilot
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Alan Pilot


Call Sign : 163-CT-220...MW7TTA
Posts : 2493
Times Thanked : 69
Join date : 2019-11-19
QTH or Location : Anglesey North Wales
Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+.
Age : 150

FT-991A Fan mod Empty
PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeWed Apr 06, 2022 6:13 pm

Fan turned up today.
Just a quick test 12v direct and does it move some air.
Bit loud flat out but i don't think it will run that fast in the radio.
Got man flu so found the medicine i got at Christmas and about to take a dose or 2.
Glenmorangie 10 year old best medicine i have found and it is a few years since i had any lol.

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Victor
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Call Sign : 26-CT-3228 / M7VIC
Posts : 5639
Times Thanked : 349
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitimeWed Apr 06, 2022 6:27 pm

Let us all know how you get on with the fan there Alan, it may help others. FT-991A Fan mod 1f44d


Hope you feel better soon mate, I got knocked with Covid and was still testing positive after 10 days!!!!

I can attest to a dram or two of the old Glenmorangie for medicinal purposes.
(Got gifted a Scottish Whiskey 'taster' set whilst I was ill. Smile )

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PostSubject: Re: FT-991A Fan mod   FT-991A Fan mod Icon_minitime

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