I have a TRC-440. It's a back up radio, but sounds good & is a good performer.
I'm interested in making some minor modifications to this radio:
1.) Replace Squelch circuit with an RF Gain using the same Pot on the front of the radio.
2.) Upgrade Finals
Attached is a schematic. I'm a novice tech, but have already perfromed the rudimentary adjustments/tweaks found on the web - notable L102 L104 L106 adjust.
Can someone tell me which final transistors to upgrade to, & which resistors I'd have to change as a result?
L102 is stuck - I'd like to just replace this part. It's an RF transformer, but looks different than L104 and L106 - not your typical ferrite coil in a threaded form with copper wire around it. It looks smaller & is sitting atop a plastic base. It may be tapped? Dunno.
73's & thanks for reading.
I'm interested in making some minor modifications to this radio:
1.) Replace Squelch circuit with an RF Gain using the same Pot on the front of the radio.
2.) Upgrade Finals
Attached is a schematic. I'm a novice tech, but have already perfromed the rudimentary adjustments/tweaks found on the web - notable L102 L104 L106 adjust.
Can someone tell me which final transistors to upgrade to, & which resistors I'd have to change as a result?
L102 is stuck - I'd like to just replace this part. It's an RF transformer, but looks different than L104 and L106 - not your typical ferrite coil in a threaded form with copper wire around it. It looks smaller & is sitting atop a plastic base. It may be tapped? Dunno.
73's & thanks for reading.