Pagina 11
KB2LJJ Radio Mods Database and Manuals
03/05/2008 08.24.31
http://www.kb2ljj.com/data/yaesu/ft-817.htm
It appears the stock "ALC release time" is It looks like the mod would increase this
alot. Does this make sense to you. I thought a short release time would raise the average power? It
works so I must be missing something....
In the schematic below V1 simulates a 500mS pulse coming from the Forward detector. The ALC
drives the dual gate VHF MOSFET to provide gain control. I set up V1 to simulate a 500mS pulse
coming from the forward detector. It repeats every 2 seconds The ALC levels at the MOSFET
gate are; 4V for maximum gain and 1V sets minimum gain.
