MagicBox V1R2B, Инструкция по сборке

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Packaging Considerations
Now that you've completed your MagicBox T/R System, you may have decided to put it into some
kind of enclosure. This document will aid your efforts in doing that. However, just so you know, it will
work just fine without being in an enclosure; it was designed to work "out in the open" with just a set
of rubber feet attached to the bottom of the PCB so that the pads are not at risk of being shorted out.
That said, here is a run down of the various 2 and 3 pin headers that are on the PCB. They provide
convenient attachments for the various switches and display LEDs that can be implemented.
Header Function
J14 Connection point for a SPST N/O switch to turn power on and off.
J12 Connection point for a power indicator LED.
J7 Connection point for a SPST N/O switch to key the MagicBox, used for tuneup.
J13 Connection point for a "transmitting" indicator LED.
J10 Connection point for a SPST N/O switch to "leak" some receive audio to output jack J6
so that a receiver can be zero beat with the transmit frequency.
A toggle switch is recommended for the power off/on switch, but a latching push button switch could
also be used.
The J7 and J10 switching functions can be implemented in a variety of ways. A single DPDT ON-Off-
ON toggle switch (used on my prototype) could be used with the upper contacts used for the J7
connections, and the lower contacts used for the J10 connections. When using the J10 "spotting
function", the transmitter needs to be on, so the upper contacts would "make" when this switch is in
either direction from the center off position. If it is desired to
not have the capability of keying the
transmitter on and leaving both hands free, one could implement either or both of the J7 and J10
functions using momentary, push button switches or a toggle switch with momentary contacts at one or
both "ON" positions.
The MagicBox was designed to fit into a Ten Tec TP41 case. The MagicBox web site has a drilling
template on it, showing locations and hole sizes for the various BNC and 1/8 inch jacks that are on the
PCB, which can be used when installing the MagicBox in this case. Note that no mounting nuts are
used on 1/8 inch jacks J5 and J6. The holes for these two jacks should be oversized enough to allow a
1/16 inch piece of 1/4 inch diameter shrink tubing to be placed over the shaft of these jacks, insulating
them from the case. Any additional hole locations and sizes for implementing the functions
documented above are left to the builder's discretion, since these will vary wildly depending on the
switches and LEDs used.
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