Name: KX22 Heat Sink End Panel
Brand: Elecraft
SKU: kx22
Availability: OutOfStock

this option is just what you will need to upgrade your already equipped KX2 that has my Side KX end panels and cover, for those needing additional heat dissipation.

In collaboration with Howard Hoyt at ProAudio Engineering, this heat-sink PAE-Kx22 was designed to allow extended transmit time at the KX2’s full-power settings, which is especially useful while using digital modes.

No passive heat sink can allow unlimited key-down time on the KX2,

however, the heat-sink for the KX2 has been engineered using thermal CAD

modeling techniques as well as KX2 transmit testing for maximum

performance with a minimum of increase in overall size. This is the

heat-sink of choice for those who want enhanced transmit time and

still retain low weight and size, and it is the absolute maximum footprint with minimum mass.

This allows the KX2 user to retain the portability which is the prime reason Elecraft

designed the KX2. With this in mind it has been engineered to be

fully compatible with the KX2 Cover and Mounting Cradle.

For more information on this heat-sink and its design and performance

capabilities, please visit: ProAudio Engineering

KX2 Radios Important UPDATE!
Elecraft has had to make a change the power amplifiers (PA’s) on the right end of the KX2, due to sourcing issues. There are now three versions of PA’s where you will be mounting the right end panel. Original KX2’s from serial number 0016 through 5417 are robust and the installation instructions are straight forward. These will use the thermal pads from the factory end panel

KX2’s with serial numbers 5417-5441 have a very delicate and different version PA’s and will require special handling to be done by either Pro Audio Engineering or Elecraft Certified Repair from Dave Wallaghen for upgraded installation due to this delicate version. Please contact them for more information on these serial numbers:
Pro Audio Engineering – [email protected]
Dave Van Wallaghen – [email protected]

KX2 radios after serial number 5441 (roughly since May 2025) are again a more robust design. These now use a white ceramic PCB to hold the new replacement PA’s. These will not have thermal pads as the PCB handles this. These newer SN 5441 plus and the older V1 radios prior to SN 5417 are a straightforward install following this updated installation manual.

Please keep in mind Elecraft does not warranty issues from third party products installed on their radios. As well any installation of third party products is at the risk of the individual doing the installation. Side KX and GemsProducts.com are not held responsible for any issues caused by the installation of these products.

For both instruction sheets and detailed videos on how to install these, see the INSTALLATION tab.

This RIGHT end only, is to upgrade your KX2 that already has my Side KX end panels to now be a heat sink version. It is sold as a single end for the right side only of the KX2

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