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-   -   F5 heat sink, rhetorical question, (http://www.diyaudio.com/forums/pass-labs/217369-f5-heat-sink-rhetorical-question.html)

john s 5th August 2012 09:31 AM

F5 heat sink, rhetorical question,
 
I'm moving to Mexico in about 4 months and have all the components and boards from the shop for Nelsons F5

i recently took apart a Cambridge 5.1 surround sound receiver and have the

have a heat sink with fan attached, small neat and compact,

this was cooling six B817 E4E1's six, D1047 E 4F1 and six D946BR, although i haven't a clue what they are but hope someone can identify them from the numbers,

Question would the 4 fets in an F5 generate more heat than this lot, ?

thanks for any thoughts or input,

John S

Zen Mod 5th August 2012 10:06 AM

pics please

john s 5th August 2012 10:22 AM

Hi Zen,

Thanks i've taken some with my mobile and will try to post as soon as i've saved them and figured out how to post them ???,

John S

powerflux 5th August 2012 10:35 AM

keep the fan and you'll be safe. if you don't it certainly won't be enough

Zen Mod 5th August 2012 10:37 AM

Quote:

Originally Posted by john s (http://www.diyaudio.com/forums/showthread.php?p=3115487#post3115487)
Hi Zen,

Thanks i've taken some with my mobile and will try to post as soon as i've saved them and figured out how to post them ???,

John S

reply-scroll down - manage attachments-browse-mark-open-upload-close this window-submit reply

keep them up to 1200pix , jpg or gif

john s 5th August 2012 10:45 AM

Quote:

Originally Posted by powerflux (http://www.diyaudio.com/forums/showthread.php?p=3115493#post3115493)
keep the fan and you'll be safe. if you don't it certainly won't be enough

Thanks yes i had realised that i know its not enough on its own i will also put in a sensor to switch off the amp if it gets to hot,

John S

john s 5th August 2012 10:48 AM

Quote:

Originally Posted by Zen Mod (http://www.diyaudio.com/forums/showthread.php?p=3115495#post3115495)
reply-scroll down - manage attachments-browse-mark-open-upload-close this window-submit reply

keep them up to 1200pix , jpg or gif


thanks Zen i still have to find them to post, to many photos of good looking women in the folder to scroll through, !!!!!

John S

john s 5th August 2012 10:57 AM

6 Attachment(s)
size is 9 inch long by 3 x 3

John S

Zen Mod 5th August 2012 11:00 AM

1 Attachment(s)
it will perfectly cool F5 , presumably with lazy spinning vent ( 7-8Vdc)

make tunnel around fins - you can use any sort of plastic foil for that ...... maybe piece of Roentgen (I scavenged full pack of these from buddy working in local lab) , so it will be most effective

attached fan control by Papa

it will start fan with full throttle and slow it down immediately

PSU voltage - simplest - just put 7812 reg in front , in case of feeding it from main amp PSU

john s 5th August 2012 11:07 AM

Thanks Zen
i'll tunnel it as you suggest yes i had intended fitting a circuit to power the fan
i think its 6 volts but will fit a pot to vary the speed,

regards all

John S


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