The numbers - well - ech... not the best, and if you see that L6 is damaged. That adds to the problem most certainly. Are just the wires going to that Coils' base, that has the mounting leads - those coil connections - are they broken? If so - then that may be salvageable but you have to pull/add or build solder up on those posts to reaffix the wires broken off - else you may need to get a part or two. Meaning Replace L6 and maybe even more for the TX side of things.
- The TX issue may mean a replacement Final - which as these radios once used. are not cheap to replace anymore - onto more complex issues meaning more parts - like the AM Regulator
Thank you though, for even trying - TR17 - in itself - does affect the power flow in the circuit.
But that does not mean it's ok. Because - the Emitter Side - towards L6 is very low. It should be adjustable due to it being the RF Gain control that does handle that pad. One side of the RF gain is to 8 V from the RX side - so it usually would have some pretty good voltage presence - so you should have been able to see voltage rise and fall on this.
- (This goes back to now knowing L6 wasn't in the best of shape - so it can explain the readings we got on the EMITTER side of TR17 during the test- not out of the woods yet though.)
The Base lead is about right - and again thank you for checking it out of circuit - for I didn't want you to keep thinking TR17 you put in there seems not to work - without checking for voltage, what levels of voltage and what pins have what voltage to them. This simplifies the fix, at least you're not left wondering if you blew another part because it still don't work. AND - that we now know we have some work in at least figuring out why the RF gain control is not "in control" - or maybe you just need to go back and re-check - either way - RF gain voltage to the Emitter side seems low.
- This design used for Galaxy may not be the best at VOLTAGE gain, but it is effective for sensing and amplifying current thru it - to develop power and obtain a voltage into L7 - using inductance then going into a capacitor into another stage versus direct capacitive coupling to the next stage. This L to C Series-circuit (then thru another L) function has some benefits. Impedance transformation is one, Better selectivity and flexibility in design and part interchangeability are others, that SMD doesn't always give you.
Well, now we know more - I'll hold back and see where you want to take this. In this instance - if it were me - I'd be calling up the boss and asking for his opinion on; continue or stop and hold and see what the customer wants.
A blown TX section can mean something very big in problems - that fixing the receive may not as simple as we once thought. This can be a brick we can only decorate but to even put the time in for that - is best left to the customer.
