Henning,
Thank you for the information. Your data is quite informative. I have bookmarked your link.
I don't have an actual radio to test against. I am hoping my ubitx will ship in the next few days.?
In measuring the agc board itself, using a 1K resistor as a load, a 100mvPP input results in an 18mvPP output across the 1K resistor. Since I don't know the load resistance of the volume pot and the final AF amp I just picked 1Kohm as a representative value. If this is true the volume will have to be turned up significantly in order to get the same speaker output. The AGC board seems to provide a gain of 5 (18mv to 90mv) while the gain of the input is about 12 (100mvPP to 1200mvPP) so it does seem to provide significant gain compression as the output of the AF preamp goes up.?
I look forward to actually measuring the AGC boards functionality when I get my ubitx put together.?
tim ab0wr
