Ramsey Electronics FR6 用户手册
FR6
• 20
Study the PC traces between the positive battery supply wire and the on-off
switch. The unused connectors on top of your switch are an ideal point to get
the + DC voltage needed for the anode (longer lead) of the LED. Plan where
and how you wish to install the LED in your enclosure.
Locating the LED immediately above the on-off switch is logical and ideal. The
simplest way to make a good installation is to drill a neat hole just slightly
smaller than the diameter of the LED. Then, enlarge the hole a little bit at a
time, just enough to let the LED be pressed in and held firmly. The resistor
may be connected to either the anode or cathode of the LED, but the anode
MUST go to + DC, with the cathode connected to the nearest common ground
point. If you are wondering why we did not include these pennies worth of
parts with your kit, you can believe any of the following reasons:
(1) We wanted to stretch your battery budget: with the LED drawing about 6
ma, how long will your battery last if you leave your receiver on for a few days,
just like we leave our computers and Ham or computer accessories on all the
time?
(2) We thought you'd have more fun planning and installing your own lamp
that glows in the dark!
(3) We could not decide which color you would like best!
THE RAMSEY ELECTRONICS CASE, KNOB & HARDWARE OPTION
switch. The unused connectors on top of your switch are an ideal point to get
the + DC voltage needed for the anode (longer lead) of the LED. Plan where
and how you wish to install the LED in your enclosure.
Locating the LED immediately above the on-off switch is logical and ideal. The
simplest way to make a good installation is to drill a neat hole just slightly
smaller than the diameter of the LED. Then, enlarge the hole a little bit at a
time, just enough to let the LED be pressed in and held firmly. The resistor
may be connected to either the anode or cathode of the LED, but the anode
MUST go to + DC, with the cathode connected to the nearest common ground
point. If you are wondering why we did not include these pennies worth of
parts with your kit, you can believe any of the following reasons:
(1) We wanted to stretch your battery budget: with the LED drawing about 6
ma, how long will your battery last if you leave your receiver on for a few days,
just like we leave our computers and Ham or computer accessories on all the
time?
(2) We thought you'd have more fun planning and installing your own lamp
that glows in the dark!
(3) We could not decide which color you would like best!
THE RAMSEY ELECTRONICS CASE, KNOB & HARDWARE OPTION
Your finished receiver can be installed in a variety of enclosures of your own
design and choosing. You might be planning to combine several Ramsey
circuit boards in a single enclosure. Use of the inexpensive and attractive
Ramsey case and knob kit will give your unit that finished look and increase its
resale value. These sturdy black instrument cases are supplied with neatly-
lettered front and rear panels, knobs, rubber feet and mounting screws.
OTHER ENCLOSURE RECOMMENDATIONS
While we believe that the Ramsey enclosure and knob option is a fine value
for finishing off your Ramsey receiver or transmitter, we are happy to give you
a couple of additional suggestions. If your first goal is economy and rugged
portability, you will find that the circuit board can be mounted nicely in a
standard VHS videotape storage box, which also gives room for a speaker, or
earphone storage, and even a roll of antenna wire. The controls are easily
mounted at one end of such a box. It may be necessary to cut away the
molded posts which secure the tape cassette itself. These storage boxes
come in several styles, so pick one that looks truly practical as a project
enclosure.
To accomplish RF shielding, the most economical metal enclosure nicely