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- By: Shadowspawn (502)
-
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-
- This box is dedicated to all the people that can't solder
- two wires together, nevermind a complete circuit... The GRAB
- Box is probably the easiest box that can be made. It's also
- one of the most useful! This box uses inductive coupling to
- join with any radio that uses a coil for an antenna (such as an
- AM, longwave, or shortwave radio) and allows you to lengthen it
- considerably. I've seen these in DAK and other catalogues for
- 20+ dollars! Now DAK is a great company, but you can make one
- or two of these yourself for under seven dollars!
-
- Here's the schematic, get ready to be surprised:
-
-
- O <---- Fahnstock clip
- |
- | _____ Variable
- +--------------+------------+ \/ Capacitor
- | |
- ~ +--)|-+
- ~ <--- Coil |
- ~ |
- | |
- +---------------------------------+
-
-
- Things you'll need/specs: It'll look something like this:
- +----antenna-----------o
- - 365pF Variable Capacitor |
- - Hand-wound coil: 1 inch dia. <C>F--/\--|COIL||--\
- 11 inches long with holes | \/--|||||||--/-+
- 2 inches from each end +-------------------+
- and #22 enameled wire
- wrapped between them.
- - Three corner braces (brass)
- - Four wood screws | Sand the enamel off |
- - 1 x 3 x 13 or so baseboard | the ends of the coil |
- - 30+ foot wire w/ alligator | the nearest end goes |
- clip to attach to | to the F. clip, the |
- Fahnstock Clip | farthest end to the |
- - Fahnstock Clip | plate contact. The |
- | antenna clip goes to |
- | the F. Clip. |
-
-
- Put this device next to the coil that's inside your radio.
- (The Grab box doesn't need to be inside it though, just close by)
- The closer you place it to your radio's coil, the stronger it is,
- the farther away, the more selectivity it has. And don't forget
- to peak the capacitor each time you change frequency...
-
- You can usually pick up a few states around you during the
- day and stations all over the US and elsewhere at night! Have
- fun!!
-
- Shadowspawn (502)
- @5211
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