DIAMOND-WEAVE LITZ COIL by W0HII FOR CRYSTAL RADIO SETS
BUILD YOUR CRYSTAL RADIO!
****Two free
1N34A diodes included****
This is a
Diamond-weave hand-wound coil for crystal radios using 250/46 Litz wire. The
design is sometimes mistaken as a spider-web coil but since it has no inner former
spokes, it is called a diamond-weave. Please Google for crystal radio
schematics. See photos. The Wooden stand shown is for demonstration purposes
only and is not included. Two free
1N34A diodes are included.
There are no
loss causing formers, coil is self-supporting, air-wound, held together with
q-dope glue and sprayed with crystal clear acrylic to strengthen the coil. Lead length is approximately 6”, and
pre-tinned. This coil wound using a 15-pin former, a 36% increase over the 11-pin
former, meaning more crossovers for better inductance performance, less inner
capacitance.
A 2.5-inch
nylon screw and 3 nylon nuts are provided to mount the coil on your set. Each
coil measured for proper inductance using an AADE L/C Meter IIB precision meter.
See photos.
Coil
Dimensions:
Coil ID: 1.650-inches
Coil OD: 3.675-inches
Coil width: 0.375-inches
Inductance: 266.8uH
This coil is
new and is sold as-is. Coil will be well packed in its own plastic container
(see photo) and shipped within the US via USPS Priority Mail. Note: Postage cost has now approched $10.00, thus the price increase. Please contact if you need additional coils. See my feedback. 73, John W0HII