Careless Order

[lawka]

Due to my careless ordering, I purchased 100 nos of IRF9610L in lieu of IRF9610 for my Aleph Pre & Power construction. Could it still be used under same condition. Please advise.

Next, how to get the thermistor CL60. Thanks a lot

[Tazzy]

Did you compare the IRF9610L with the IRF9610 on www.irf.com?

Couldn't find L? instead I found STRL with is a D2Pak package.

Looks like smd stuff to me?

[Kermit]

Looks like irf9610L is to-262 and irf9610 is to-220.
http://dkc3.digikey.com/pdf/T033/0545-0553.pdf
Pins are identical so I think it is safe to say they can be used. The only ting i can think of is that the tab is sligtly smaler so they might become hotter..? And more troublesome to mount on a heatsink.

[Nelson Pass]

Go ahead and use them.

[lawka]

The ordered IRFP240 & IRF9610L has come to my home yesterday. Matching have to start and I checked the same characteristic between IRF9610L & IRF9610 expect their package.

I wish to ask the necessity to apply the heat sink on Q1 & Q2 of Aleph 5 because I have a look to some Taiwan DIY's product via web.

Any comments of followings for Aleph 5 :

1. 500VA transformer for single channel is enough or not
2. 18000UF 50V Malloy capacitor x 6 nr of single channel
3. Heatsink area is quite small, just 450 mm L x 150 mm H x 45 mm thick for single channel
4. CLC filter must be better while compare to Capacitor only
5. Using the brass plate for filter capacitor connection have the sound advantage really or just gimmick

Thanks

[Nelson Pass]

1. 500VA transformer for single channel is enough or not
Yes
2. 18000UF 50V Malloy capacitor x 6 nr of single channel
Sure.
3. Heatsink area is quite small, just 450 mm L x 150 mm H x 45 mm thick for single channel
Buy a fan
4. CLC filter must be better while compare to Capacitor only
You bet
5. Using the brass plate for filter capacitor connection have the sound advantage really or just gimmick
Use gold

[lawka]

Mr Pass

Fans or Friends really. the noise it generated will lower my intention to listern the music.

I may propose to buy a larger chassis to provide a larger area.

Appreciate your suggestion.

[moe29]

yes, heatsinks never seem to be big enough!

when you think you have enough, add a little more

other than added complexity (a 12 volt power supply) a fan
wouldn't really bother me, because you can use one that
wouldn't be heard at the listening position - that could help in
cooling a lot... but most purests run screaming at the thought

i wish i could turn off my refreigerator's compressor when listening
to music... when that thing shuts off all of the sudden - your
realize how much noise pollution it's adding to the room!

[HDTVman]

You should hear my furnance. It drounds out the kids. a 6 year old, a 3 year old and a 2 year old. Now that's noise pollution.

Later BZ

[faustian bargin]

no kidding on the fridge noise - i have an open plan living room/dining room/kitchen space, and i can hear EVERYTHING. not to mention the fridge is older than any rational person should use, so it sound like a motorcyle when it comes on. (slight exaggeration.)

when i want to listen (or watch movies) in peace, i just unplug the fridge. it won't hurt anything for just a couple hours.

the other noise problem is my furnace - it sounds like a jet when the flames are ignited, and then the forced air sounds like a wind tunnel.

sorry for the OT...

/andrew - enjoying the 'sounds of silence' (ha!)