Wednesday, March 03, 2010
HF radio - Balanced modulator + SSB IF filter
The schematic from the balanced modulator and crystal filter pre-amp are correct, just finished to place the boards in the radio and made a quick test, still need to check BFO frequency and align the impedance match on the filter.
Here's the video transmitting on 9Mhz USB (9Mhz + 1.5 Khz, more Khz minus Khz):
The boards in place:
And the current status of the front panel, the tree pot's on the lower line without buttons are from left to right: mic gain, tx gain and reception AGC (slow, fast, manual):