ruffrecords

Dual TO-92 heatsink
« on: December 31, 2020, 05:14:08 PM »
I seem to remember in the dim and distant past you could get a small heat sink that took a pair of TO-92 transistors so you could thermally couple them. They had a couple of legs so you could solder them to the PCB as well. Can't seem to find them anywhere. Do they still make them?

Cheers

Ian
« Last Edit: December 31, 2020, 06:30:02 PM by ruffrecords »
www.customtubeconsoles.com
https://mark3vtm.blogspot.co.uk/
www.eztubemixer.blogspot.co.uk


'The only people not making mistakes are the people doing nothing'


Dan Kennedy

Re: DUal T)-92 heatsink
« Reply #1 on: December 31, 2020, 06:30:58 PM »
Did you search under "Buggy Whips"?

I couldn't find them either. The one clever thing I saw was two TO-92's face to face in a hex nut, likely 1/4", secured with a little epoxy.  Find an aluminum nut, reduced mass after all, and you're cool.

JohnRoberts

Re: Dual TO-92 heatsink
« Reply #2 on: January 01, 2021, 10:00:14 AM »
I seem to remember in the dim and distant past you could get a small heat sink that took a pair of TO-92 transistors so you could thermally couple them. They had a couple of legs so you could solder them to the PCB as well. Can't seem to find them anywhere. Do they still make them?

Cheers

Ian
I don't recall those. As Dan mentioned I have seen people put two to-92 face to face and screwed a nut on the pair. 

You might be able to repurpose a press on heat sink for round metal cans, like to-5 (probably loose), or to-39 probably too small.

Back in the day I used transistor arrays to get good thermal tracking, but device parameters are limited.

JR
It's nice to be nice....

Audio1Man

Re: Dual TO-92 heatsink
« Reply #3 on: January 01, 2021, 04:47:15 PM »
Hi Ian
Look @ TO-237, 2N6714-2N6726 or similar. They are a TO92 with a metal tab.
Duke

ruffrecords

Re: Dual TO-92 heatsink
« Reply #4 on: January 01, 2021, 06:06:10 PM »
Hi Ian
Look @ TO-237, 2N6714-2N6726 or similar. They are a TO92 with a metal tab.
Duke

Cool. Never seen those before.

Cheers

Ian
www.customtubeconsoles.com
https://mark3vtm.blogspot.co.uk/
www.eztubemixer.blogspot.co.uk


'The only people not making mistakes are the people doing nothing'

Re: Dual TO-92 heatsink
« Reply #5 on: January 02, 2021, 12:51:29 AM »
I superglued the flat faces together, and then fashioned a ring out of copper sheet cut to a bit more than the height of the TO92 case to surround the two transistors. It stays on by the fit of the copper band. Works well.


 

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