Ramsey Electronics QAMP30 manual QAMP-30

We're almost finished. All we need to do now is install a few remaining parts that have to be handmade - for that "old-world craftsmanship" touch! We'll prepare all those parts now for further assembly. We give you plenty of enameled wire, but if you mess up, you can get a whole 50' spool of it from Radio Shack.

ˆ41. Winding L1 and L3 toroid RF coils (two identical units ): Locate 2 of the donut shaped yellow toroid cores provided in the kit. Cut 10" of the enameled magnet wire and, following the drawing, thread the wire through the core 15 times - not 14, not 16; it MUST be 15 times through the core, pulling each turn gently tight. Winding too tightly runs the risk of scraping off the enamel insulation and shorting the wire. Tin each end with solder by holding your soldering iron and solder the wire ends until the insulation melts away and the copper wire underneath coats nicely with solder. Tin all the way up to the toroid core body.

15 turns through center of core

IMPORTANT: Loop the first winding around the front of the

core as shown.

ˆ42. Winding L2: Locate the remaining yellow toroid core and cut 11" of enameled magnet wire. Wind 16 turns through the core using the same procedure as above. Tin the wire ends as before. Mark this part with a piece of tape, a dab of paint or a magic marker. We don't want to confuse it with the other two toroid coils wound just before!

16 turns through center of core

IMPORTANT: Loop the first winding around the front of the core as shown.

ˆ43. Winding T2: Locate the smaller of the two 2-hole ferrite cores. Cut off one 11 inch length of enameled magnet wire and thread the wire through the core 6 times, pulling each turn gently tight. That's 6 times through each hole, resulting in 6 complete whole turns through the core. Be especially careful not to strip the insulation by pulling too tightly around the core. The

QAMP-30 • 10