13.5 seconds key down, twice a minute, or 7.5 seconds four times a
minute about 47% duty cycle; just to be clear.
Add the heatsinks, they may help and they won't hurt a thing.
73,
Rick nk7i
On 7/16/2025 12:44 PM, Julia Tuttle via Elecraft wrote:
3. Additional heatsinking is necessary only to avoid foldback while
operating digital modes like FT8 that transmit at 100% duty cycle for 30
seconds straight.
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