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Step 8Assembly
Right now that all the pieces have been made it is time to put it all together.
Materials:
- all the screws, washers, nuts, solder lugs and other miscellaneous hardware
- the case, detector parts, panel, tap switch wiper ect
Tools:
- flat head screwdriver
- pliers
- 5/16" open ended wrench
- soldering iron and solder
- wire cutters and strippers
1) First we well start by assembling the tap switch.
a) Start by adding the screws for the tap switch, place a screw in the hole and add a solder lug to the back side and tighten it all down with a nut. Make sure to position the solder lug pointing to the center of the the circle.
b) Slide a washer over the end of the tap switch wiper and install the wiper in the center hole.
c) Slide another washer over the screw and add a nut tightening it down so that the wiper turns with a some resistance so that it well not lose its setting when in use. Slide a solder lug onto the screw and add another nut tightening it down to the other nut locking the two together.
d) Cut the excess screw off.
2) Installing the coil.
a) Install the 2" coil mounting screws through the front of the panel and secure them with nuts.
b) Solder short, about 3" to 4" long, pieces of wire to each of the 8 coil taps.
c) Solder the tap wires to the tap switch contacts starting with the first tap a the fifth winding in the first contact and progressing all the way around the tap switch until all 8 taps are wired.
d) The ninth contact of the tap switch is connected to the end of the coil along with a piece of wire that well be used later.
e) Solder a length of wire to the tap switch wiper.
f) Install the coil onto the coil mounting screws with a washer and nut on each side.
3) Installing the remaining components.
a) Mount the stereo headphone jack to the panel.
b) Next mount the crystal holder with a screw, solder terminal and nut. If you are using a germanium diode instead of the crystal holder install a Fahnstock clip instead, still using a screw and solder lug.
c) Mount the binding post for the cats whisker tightening down only lightly so that the binding post can be swiveled back and forth to help aid in setting the detector. Again if using a diode install a Fahnstock clip using a screw and solder lug.
d) Now using 6 6-32 1/4" long screws, mount the variable capacitors and turn the knob to make sure that the stator does not run into the ends of the screws, if it does you well need to place washers between the panel and the capacitor frames so that they clear.
4) Wiring!!!
a) First solder the wire coming from the 9th tap switch contact/ end of coil to the bottom of the binding post.
b) Glue the impedance matching transformer to the back of the panel between detector and the headphone jack and solder one side of the primary winding to the detector crystal holder.
c) Solder one side of the matching transformer secondary to both the ring and tip terminals of the stereo headphone jack. Solder the other end to the sleeve terminal.
d) Solder a wire to connect the frames of the two variable capacitors together. Also solder the unused end of the matching transformer primary to the one of the two capacitor frames. Solder the wire coming from the tap switch wiper to one of the capacitor frames as well.(see photo)
e) Solder a wire from the stator of the tuning capacitor C1, the one closest to the antenna and ground binding posts, to the antenna binding post. Solder another wire from the ground capacitor C2 to the ground binding post.
5) Final Assembly
a) Set the panel into the box onto the mounts and install the mounting screws.
b) Use glue stick to glue the dial faces to the front panel and install the knobs.
c) See next step on how to use the set.
Materials:
- all the screws, washers, nuts, solder lugs and other miscellaneous hardware
- the case, detector parts, panel, tap switch wiper ect
Tools:
- flat head screwdriver
- pliers
- 5/16" open ended wrench
- soldering iron and solder
- wire cutters and strippers
1) First we well start by assembling the tap switch.
a) Start by adding the screws for the tap switch, place a screw in the hole and add a solder lug to the back side and tighten it all down with a nut. Make sure to position the solder lug pointing to the center of the the circle.
b) Slide a washer over the end of the tap switch wiper and install the wiper in the center hole.
c) Slide another washer over the screw and add a nut tightening it down so that the wiper turns with a some resistance so that it well not lose its setting when in use. Slide a solder lug onto the screw and add another nut tightening it down to the other nut locking the two together.
d) Cut the excess screw off.
2) Installing the coil.
a) Install the 2" coil mounting screws through the front of the panel and secure them with nuts.
b) Solder short, about 3" to 4" long, pieces of wire to each of the 8 coil taps.
c) Solder the tap wires to the tap switch contacts starting with the first tap a the fifth winding in the first contact and progressing all the way around the tap switch until all 8 taps are wired.
d) The ninth contact of the tap switch is connected to the end of the coil along with a piece of wire that well be used later.
e) Solder a length of wire to the tap switch wiper.
f) Install the coil onto the coil mounting screws with a washer and nut on each side.
3) Installing the remaining components.
a) Mount the stereo headphone jack to the panel.
b) Next mount the crystal holder with a screw, solder terminal and nut. If you are using a germanium diode instead of the crystal holder install a Fahnstock clip instead, still using a screw and solder lug.
c) Mount the binding post for the cats whisker tightening down only lightly so that the binding post can be swiveled back and forth to help aid in setting the detector. Again if using a diode install a Fahnstock clip using a screw and solder lug.
d) Now using 6 6-32 1/4" long screws, mount the variable capacitors and turn the knob to make sure that the stator does not run into the ends of the screws, if it does you well need to place washers between the panel and the capacitor frames so that they clear.
4) Wiring!!!
a) First solder the wire coming from the 9th tap switch contact/ end of coil to the bottom of the binding post.
b) Glue the impedance matching transformer to the back of the panel between detector and the headphone jack and solder one side of the primary winding to the detector crystal holder.
c) Solder one side of the matching transformer secondary to both the ring and tip terminals of the stereo headphone jack. Solder the other end to the sleeve terminal.
d) Solder a wire to connect the frames of the two variable capacitors together. Also solder the unused end of the matching transformer primary to the one of the two capacitor frames. Solder the wire coming from the tap switch wiper to one of the capacitor frames as well.(see photo)
e) Solder a wire from the stator of the tuning capacitor C1, the one closest to the antenna and ground binding posts, to the antenna binding post. Solder another wire from the ground capacitor C2 to the ground binding post.
5) Final Assembly
a) Set the panel into the box onto the mounts and install the mounting screws.
b) Use glue stick to glue the dial faces to the front panel and install the knobs.
c) See next step on how to use the set.
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