Topic: suggestion plz: exhaust fan.

[JojoD818]

Make amples of it Jo, lets prove the critics wrong on what's the difference between a Handcrafted Quality Fan & a mass produce fan. As to my knowledge laptop fans are parang anemic yung rotation sa fan & in months time parang Ferris Wheel na siya nag rotate parang wala ng kain

Will do sir after I'm done toying around pulse width modulation and temperature control. Nakakatuwa din kasi pag self perpetuating yun design, para fire and forget na siya which means added peace of mind.

Ok lang naman yun sir, kung saan masaya ayus din dun. I just needed to butt in to explain stuff.

Queso De Bola, parang COMPRESSOR na yata ito Brader Tirso 

Napapanahon na ito, Ber months na eh... 

[FrancisS]

Will do sir after I'm done toying around pulse width modulation and temperature control. Nakakatuwa din kasi pag self perpetuating yun design, para fire and forget na siya which means added peace of mind.

Ok lang naman yun sir, kung saan masaya ayus din dun. I just needed to butt in to explain stuff.


Napapanahon na ito, Ber months na eh... 

update us sir kapag meron na kayo magagawa ulit, maganda rin talaga fan with variable speed.

[comet]

Naku sir Jo ako ang nagpasok ng fan mo dito sa thread, super bilib kasi ako sa fan mo. I hope you make more for the other members.  This is one very good investment to protect your AVR from overheating. Sulit talaga.

[JojoD818]

update us sir kapag meron na kayo magagawa ulit, maganda rin talaga fan with variable speed.

The goal po is to maintain the "idle temp" of the amp sir, not to cool or otherwise the Vbe multiplier of the bias circuit will think that the amp is in a "cold start" and will increase the idle current accordingly. Conversely, thermal derating also occurs when the amp gets too hot so ideally, temperature should be kept constant.

Pero rocket science na yan usapan na yan, nood lang ng nood at makinig ng makinig, enjoy your videos and music!

Naku sir Jo ako ang nagpasok ng fan mo dito sa thread, super bilib kasi ako sa fan mo. I hope you make more for the other members.  This is one very good investment to protect your AVR from overheating. Sulit talaga.

Hey Doc kumusta na ang autopsy setup natin diyan? 

I hope so too but unfortunately I'm in a tight sched right now... 

Cheers!

[FrancisS]

The goal po is to maintain the "idle temp" of the amp sir, not to cool or otherwise the Vbe multiplier of the bias circuit will think that the amp is in a "cold start" and will increase the idle current accordingly. Conversely, thermal derating also occurs when the amp gets too hot so ideally, temperature should be kept constant.

Pero rocket science na yan usapan na yan, nood lang ng nood at makinig ng makinig, enjoy your videos and music!



Hey Doc kumusta na ang autopsy setup natin diyan? 

I hope so too but unfortunately I'm in a tight sched right now... 

Cheers!

Just like how engine fans work on automobiles, it helps maintain proper operating temperature.  

[at_sunset_blvd]

Just like how engine fans work on automobiles, it helps maintain proper operating temperature.  

+1 

[Freddie kruger]

Sir Jo,
    may diagram ka ba nyan? Kung trade secret ok lang,

[buzzworth]

I also own an ONKYO 609, Just want to share what I did for my receiver, so far ok naman.

All items from CDR-King

I bought a Notebook Cooler for 380php, there were cheaper ones but I chose this model because it had 2 big fans and its color was black, which would make it almost invisible on top of the 609.  This notebook cooler looked the most classy among the others available, well it was one of the most expensive.

   

I got a USB adapter for 50php in order for me to be able to plug it in a 220 outlet.



Since the USB cable attached to the notebook cooler was really short, I got a usb extension for 80php, so it would be able to reach the 220 outlet.




I went home, assembled it, put it on top of the receiver and so far, it works fine, does it job of cooling the 609, looks "cool" too.

Hope this helps.

nice suggestion, I will try this one  for 510.00, I will have a peace of mind when using Onkyo in a movie marathon pag weekend.

[Mr.T.one]

buksan mo yung case, then tapatan mo ng electric fan. parang cpu ng computer. siguradong bababa ng 5 degrees celsius ang ambiant temperature.

[markcrenz]

buksan mo yung case, then tapatan mo ng electric fan. parang cpu ng computer. siguradong bababa ng 5 degrees celsius ang ambiant temperature.

pag ginawa ko yan yung misis ko naman bubuksan ang pinto... at sisipain ako palabas!

[FrancisS]

nice suggestion, I will try this one  for 510.00, I will have a peace of mind when using Onkyo in a movie marathon pag weekend.

mahina lang higop, but it helps get the heat out of the Onlyo. 

[Mr.T.one]

pag ginawa ko yan yung misis ko naman bubuksan ang pinto... at sisipain ako palabas!

kapag sinipa ka palabas, bigla kang pumunta sa karaoke ktv bar.  mas maganda "sounds" dun.

[markcrenz]

kapag sinipa ka palabas, bigla kang pumunta sa karaoke ktv bar.  mas maganda sounds dun.

with their levels playing almost always above clipping levels? highly doubtful 

[badoy]

in fairness may mga KTV bar din naman na pro amp ang gamit. kaya kahit bumirit ka ng tudo walang clipping sounds..

[markcrenz]

in fairness may mga KTV bar din naman na pro amp ang gamit. kaya kahit bumirit ka ng tudo walang clipping sounds..

pag bumirit ako ng todo, clipped or not, sigurado pangit ang sound! sorry last OT na.  

[JojoD818]

pag bumirit ako ng todo, clipped or not, sigurado pangit ang sound! sorry last OT na.  

tara na Red Box na 'to!!! 


sorry can't help it... 

[JojoD818]

Sir Jo,
    may diagram ka ba nyan? Kung trade secret ok lang,

Sir,

Read and learn here: http://www.national.com/assets/en/other/TempSensorHandbook_2008.pdf


I've been getting PMs/email requests for a temp sensor/fan driver that can be put on top of an AVR/Amp and power those cheapo CDR-King fans. So instead of making more fans, I am thinking of designing a gadget that can sense the temperature of an amp and power those laptop/desktop fans sold at pc stores.

Those CDR-King fans btw are rated 12V but are intentionally being run at 5V to make them virtually noiseless.


 

[Nelson de Leon]

Nice explanation tukayo.  We don't need a strong fan because the amp is already designed for it's proper working temparature. kaya lang, maiinit din kasi sa bansa natin. Just a little help para sa heat convection is already enough. Thermostat kaya tukayo? Dual thermostat for 3 fan speed settings. Can you toy around with controlling the power cycle input din ng fan. Mas-safer din ata yun.

[JojoD818]

It all depends on the ambient, besides, the manufacturers didn't gave any specific operating temps for their AVRs. But all solid state parts are rated at 25*C and should be derrated accordingly as temperature rises.

A thermostat? It will work for sure but I'd rather use something different. Are you also designing one? You can use a thermostat there if you like and let's compare notes.

Power cycle? Are you talking about pulse width modulation? If yes, then that's peanuts but not necessary.