Quote:
Originally Posted by trh01uk
Quote:
Originally Posted by ms660
AGC chasing can also produce a similar effect.
Lawrence.
|
How does AGC chasing work only for the primary side of an IF transformer - but not the secondary?
Richard |
The secondary is peaked and at the peak the input to the AGC detector might be below the AGC threshold so no AGC action, then tuning the secondary towards its peak the input to the detector increases as does it's output but at some point the AGC threshold might be exceed, then further tuning of the coil towards its peak makes little difference to the output because the increasing AGC action tends to mask the effect of the tuning adjustment both towards the peak and after the peak.....Not saying that this is the problem with the OP's receiver but I thought I would mention the effect anyway, a lot of alignment instructions say to keep the signal input to a minimum to avoid that effect.
Lawrence.