The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Hi,
Q55 ( AF AM Amplifier 2SA1869 )on my Galaxy DX949s is getting very hot when I TX using a dummy load.
It still heats up while using an antenna, just not as hot.
What can I do to run cooler?
Thanks
Jimbo

AM AF Amplifier Improvement - Q55

This is another improvement, which has previously been published for the EPT690010Z. The stock AF Amplifier is the 2SA473. Replacing this with the 2SA1012-0 or the ECG153 will improve the clarity and volume of the modulation. It will also run much cooler which provides stability for the device. If you plan to use the DX959 or DX949 with the provided stock microphone, this upgrade is highly suggested for maximum AM modulation.

This does work.