With Peltier elements you have the same problem!
While the side in touch with the transistor is absorbing heat, the far side
heats up at the same rate so that you have to get rid of THAT heat, just
like you did before.and you dissipate power in the element besides.
What's needed is heat transfer by circulation: a hollow heatsink, some pump
and a heat exchanger from an old car's heating system (blower included).
Just remember to add antifreeze to the water to stop corrosion.
Alex 4Z5KS
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Bill Turner
Sent: Thursday, June 06, 2013 3:25 PM
To: Amps
Subject: Re: [Amps] Advice needed for SS amp
ORIGINAL MESSAGE: (may be snipped)
On Thu, 06 Jun 2013 00:48:43 -0400, Roger wrote:
>If refrigerated it can greatly increase the transistor's power handling
>capacity. With computers they just submerge the entire CPU, or CPUs
>directly in the refrigerant.
REPLY:
Interesting thought. I know there are Peltier junction coolers available
though I don't know much about them or how expensive they are for an
adequate size. I see a few listed on eBay.
Will investigate further.
73, Bill W6WRT
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