So the audio amplifier is in place as above, the test for sound was a sucess and so I continue following the instructions to complete the radio receiver.
Next up are the resistors for the detector and preamp stage including a small wire to connect the long pad to a smaller pad. Notice that when soldering to the ground plane (the copper base) it is best to heat the area with the soldering iron then apply some solder to form a connection point to then solder the component to.
Then the capacitors are soldered to the board making sure the electrolytic capacitors were the correct way around. It was easier to bend out the legs to then solder neatly in place.
And then I soldered the zener diode in place taking note of the cathode/anode lead.
Then I soldered a wire between two pads joining up the amplifier and detector/preamp stages. After testing for voltage I did in fact get 8.97v which might be showing up some problem as I should have around 6.2v. I have checked the poliarity and resistors are correct but so far haven't seen any errors. I have continued none the less.
Next up were the transistors, 2N3819 - audio preamplifier transistor and 2N3904 - impedance detector transistor. Notice the positioning of the transistors identified by the semi-circle shape. After several tests of the transistors and putting the rest of the resistors in place the next thing is the controller.
This controller is a potentiometer as you can see attached in the bottom left of this photograph.
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There are still 6 more stages of construction to complete which will have to take place on another day. It was getting late during this latest build and the smell of solder was getting to me.
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