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Categories | QRP Accessories | Cooler KX TM Heatsink by VE7FMN for Elecraft KX3 Help

Show all reviews of the Cooler KX TM Heatsink by VE7FMN for Elecraft KX3

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NA1DX  Rating: 5/5 May 21, 2014 14:04  Send this review to a friend!
Oh So Cool!  Time owned: 0 to 3 months
I received my “Cooler KX by VE7FMN” heatsink from Fred VE7FMN (fsmeier@telus.net) yesterday.

This morning over morning coffee before work, I installed the heatsink. I removed the KX3 top plate and replaced it with the heatsink. Perfect fit and very easy to do. It had a nice finish, too.


JT65-HF MODE BEFORE HEATSINK INSTALLATION

I have been operating JT65-HF with the KX3 the last few weeks. Prior to installation, running JT65-HF at 10w the KX3 would give me a high temp warning and throttle back to 5w about 75-80% of the way through the transmission. The TX last 45 seconds +/- usually. So, just 30 sec or so, the KX3 would throttle back. In fact, most times going over 6+ watts would result in a high-temp warning and the TX would throttle back. Using Mom’s old standard of checking the forehead of the child to see if the child was running a temperature, the KX3 was very warm to hot to touch during this operation.


JT65-HF MODE AFTER HEATSINK INSTALLATION

This morning after installing the heatsink, the KX3 stayed at 10w during the full transmission of JT65-HF contacts and never gave me a high temperature warning. In addition, the little one did not feel like it was even warm to touch. I operated JT65-HF on 40m at 10w in the normal operating mode of TX/RX for close to an hour with no issues.

Thanks Fred! I can use the KX3 to drive my Heathkit SB-200 to 100+w using just 10w input if I want. 
Product is in production.
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