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Diskussions- und Newsboard des DARC-Ortsverbandes I40  |  allgemeine Kategorie  |  OVI40 SDR Projekt (English AND German discussions around OVI40 SDR project) (Moderators: DF8OE, DL1PQ)  |  Topic: OVI40, WK Housing Heatsink <- zurück vorwärts ->
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S58J
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OVI40, WK Housing Heatsink
« on: 19. June 2019, 06:48:14 »

Hi

For those using the housing for your OVI40 project done by WK (Germany) there is another alternative for additional heatsink. The same housing is also used by many mcHF users (up to rev 0.6). This email is a follow on to what DL5VA already suggested in April/May this year.

On Ebay I bought a Chinese alternative (who else, hi) for Elecraft KX3 Heatsink. It costed 18 EUR, including shipping. It is a perfect fit to OVI40 with WK housing as well. Check the photos. Now I need to cut the opening in fix the heatsink to the existing ALU block. I'll keep you posted.

Janez, S58J
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Re:OVI40, WK Housing Heatsink
« Reply #1 on: 19. June 2019, 06:50:32 »

Photo 1
 KX3_Heatsink_3.jpg
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Re:OVI40, WK Housing Heatsink
« Reply #2 on: 19. June 2019, 06:53:11 »

Photo 3
 KX3_Heatsink_1.jpg
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Re:OVI40, WK Housing Heatsink
« Reply #3 on: 18. March 2020, 13:47:14 »

Hi

Current virus situation is also a chance to complete long hold projects. I finally managed to attach the KX3 Heatsink to my OVI40/mcHF combo, both installed in the WK Housing.

First it was necessary to cut the hole on the upper side. Then I drilled two holes on both sides in order to fix the existing inner Alu cooling block - to avoid the mechanical stress to both output transistors and both voltage regulators. Last but not least - fixing the KX3 heatsink to the Alu block. The results:

- max. measured temperature on RX: 51,2 C (ambient temperature was 24 C) after 12 hours on RX, before that it was easy to bo beyond 60 C after one hour of use.
- total weight: 850 g.

Please check photos.

The link to the KX3 Heatsink (price: 18 EUR)

https://www.ebay.com/itm/Black-color-External-Radiator-Heatsink-kits-for-ELECRAFT-KX3-Transceiver/131766630992?hash=item1eade73a50:g:LCgAAOSwzvlW-6K7

Janez, S58J
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Re:OVI40, WK Housing Heatsink
« Reply #4 on: 18. March 2020, 13:49:36 »

Nice work, Janez! Looks fine 

vy 73
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Re:OVI40, WK Housing Heatsink
« Reply #5 on: 18. March 2020, 13:50:14 »

Hole on upper side
 heatsink_01.jpg
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S58J
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Re:OVI40, WK Housing Heatsink
« Reply #6 on: 18. March 2020, 13:54:33 »

Fixing existing Alu block to both sides - preventing mechanical stress to the elements attached to it.
 heatsink_02.jpg
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S58J
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Re:OVI40, WK Housing Heatsink
« Reply #7 on: 18. March 2020, 13:56:35 »

Fixing together both cooling bodies
 heatsink_03.jpg
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Re:OVI40, WK Housing Heatsink
« Reply #8 on: 18. March 2020, 13:57:39 »

The result - side view
 heatsink_04.jpg
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S58J
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Re:OVI40, WK Housing Heatsink
« Reply #9 on: 18. March 2020, 20:58:43 »

Front view
 heatsink_08.jpg
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Diskussions- und Newsboard des DARC-Ortsverbandes I40  |  allgemeine Kategorie  |  OVI40 SDR Projekt (English AND German discussions around OVI40 SDR project) (Moderators: DF8OE, DL1PQ)  |  Topic: OVI40, WK Housing Heatsink <- zurück vorwärts ->
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