Hmmm....
First - you tell me this...
So that means you HAD 27MHz and a 1st IF ...
Then I get this...
Ok, what did you do during this process?
Did you remember to put on or use a Dummy load or put at least an antenna on the Antenna connector?
IF you have all those tools...
To hear yourself talking thru into the receiver of another radio - It meant you were broadcasting, quite possibly the Final was bad, can't tell now.
But you were able to use the Driver to at least "modulate" - you were able to hear yourself on another radio - so that meant you had at least got audio and what RF the Pre-driver was producing - into the Driver to make some form of modulation you heard on the other radio.
For if Audio couldn't get to the Driver you would not hear audio, or the RF couldn't make it to the Driver, you would only have a very weak Carrier, no audio
By your word, you did have carrier, enough to hear you talking thru another radio - at one time...
Now, it don't.
But "you did", so what did you do, to the inside of the radio, to now make it so "it doesn't".
Best to work in stages, think it thru, you know you have to make the TX strip functional so why replace a bunch of parts when we haven't even tested the Final or even checked for bad or poorly soldered connections?
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You won't have much luck using just a 16.965 MHz Xtal - the PLL needs 10.240 to make the channels work - it makes that ~16-17MHz signal - and that requires L15 to be able to make D11 Varactor Capacitance effect "Ring" with L15's coil - TR11 amplifies this and sends some of this back to the PLL to keep L15 and D11 ringing - other part goes to TR12 gets amplified, sent to L16 then to TP3 AND TX Mixer IC2 together (and your L18/L16 mess).
IC2 stays off until it's told to turn on thru TR16 - TR19 turn off, turning off your RX light letting TX light go on.
So if you don't have ANY signal on TP3 - the L16 - L15 need to be checked - you go back to TP-2, that R59 - and look for voltages - reset the channel selector to Channel 1 see if you get any voltage on TP 2, then tune to Channel 40 and review the same - does 4 volts or so show up? Tune L15 to get this - L16 will help "balance" RX and TX with L2 and L3 of the RX side helping "equalize" the RX band plan..
IF you can't get it to ring, remember C101 and C102 - those 2.2uF Electrolytic caps? Use Fresh known good and install Positive to Positive or Negative to Negative until you have signal - you have to make that part of the loop work.
