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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 10:31 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 11:06 AM

pics please

john s 5th August 2012 11:22 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 11:35 AM

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

Zen Mod 5th August 2012 11:37 AM

Quote:

Originally Posted by john s (Post 3115487)
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 11:45 AM

Quote:

Originally Posted by powerflux (Post 3115493)
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 11:48 AM

Quote:

Originally Posted by Zen Mod (Post 3115495)
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 11:57 AM

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

John S

Zen Mod 5th August 2012 12:00 PM

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 12:07 PM

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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