Allied Radio Knight-Kit Crystal Set 83 Y 261 Manual - Página 3
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Imprimir páginaKITS WIRED WITH ACID-CORE SOLDER OR ACID FLUX WILL CORRODE AND WILL NOT
WORK PROPERLY. SUCH KITS ARE NOT ELIGIBLE FOR RE-PAIR OR SERVICE.
WINDING THE COIL SEE FIGURE I.
COIL WINDING NOTES: Unwind several feet from the coil
of enameled wire supplied. To avoid kinks in the wire, have someone hold the roll of wire and feed it
slowly as required. The wire must be wound tightly on the coil form and each turn should be pushed as
close to the last turn as possible-
( ) Pass about 4" of the wire through hole "B" to the in- side of the coIl fonn. Then pull the s;J.me end of
the wire to the outside through hole "A".
( ) Wind 20 turns on the coil form for the primary section. If necessary, stop and press the turns tightly
together.
( ) After the 20 turns have been wound on the form, leave an additional 5" of wire and cut off the
remaining portion.
( ) Feed the end of the primary winding through hole "C" to the inside of the form, and then back out
through hole "0". Pull it tightly to anchor it in place.
( ) Now, take the remaining portion of the coil of wire and feed 5" of it through hole "E" to the inside of
the form. Then, pull it out again through hole "D".
( ) Wind 30 turns of the secondary on the coil form and make a tap as shown. Be sure to thoroughly
scrape the enamel from about 1" of the wire for the tap. Be careful not to nick the wire while scraping. If
you desire to be able to adjust the sensitivity and selectivity of your crystal set, additional taps should be
placed at 60 and 90 turns. Continue winding the secondary until only about 10" of the wire remains.
( ) After the secondary turns have been wound on the form, leave a 4" length and cut off the remainder.
( ) Pass the end of the secondary winding through hole "F" to the inside of the form. Then pull it out
again through hole "G". Pull it tightly to anchor it in place.
( ) Attach the two "Z" brackets to the coil form with the two longer machine screws and nuts.
PARTS MOUNTING
( ) Cut out the template and place it on the board. Make small holes with a nail at the points indicated.
This will position the parts correctly on the board and will enable the wood screws to start easily.
( ) Attach the four Fahnestock clips to the board with wood screws.
( ) Mount the two. "L" brackets to the board. Put the solder lug over one of the two short machine
screws. Use this screw-solder lug combination to fasten the tuning capacitor to the left" L" bracket.
( ) Mount the coil to the board.
WIRING
( ) Thoroughly scrape the enamel coating from the end of the wire coming through hole "A" of the coil
form. Then, solder it to the antenna clip.