Ramsey Electronics FX-440 Manual page 75

simply the 5 connector pins, or 2 extra pins for mechanical
stability. Either style fits your PC board.)
I
Directions~or
installing hardware or unusal parts often require extra
written det l You've just been through a lot of that in this stage. The
following , teps are more typical of how many upcoming installation
direc9o?o/will be given:
'
///
[ 11 {
P/l
A13. Install C2, .001 uf disc capacitor. It may be marked .001 or
1 nf or 102. (102 means a one, a zero and two zeros which
equals: 1000 pf. 1000 pf is the same as .001 uf. This notation
(102) is similar to the resistor color code to indicate resistance
/ .'{calues.
·' I
['!(!Li
A14./lnstall C3, .001 uf
/
/
/
[ \J/(\)i
A}S· Install C4, .001 uf
,. t'
[\J/r1l/A16. Install C1, .001 uf(Don't confuse with C65).
v
,,,,,..,)::#~'
_,
[ er· [
\I
~'f7.
Install C65, .1 uf. It may be marked .1 or 104. (As above,
,,"'! 04 means a one, a zero and four zeros
=
100, 000 pf which is
the same as .1 uf) (On the schematic, C65 is located near J4 and
/'' U} and couples packet audio to the microphone input line.)
[t"]/ [i.( A18a Select 09, one of the many 1N914 or 1N4148 switching
diodes used in the circuit. Don't confuse these diodes with the
smaller PIN and varactor diodes used in later stages. Notice the
dark band at one end designating the cathode and notice how the
cathode end is imprinted right on the PC board.
[
i.rt:,:~:r/~18t>
.. Jnstall 09.
, , , e '
[(vl-1Cr.A19. Install R42, 2.2K (red-red-red). This is an "upright"
installation like 018, already installed. Almost all resistors will be
installed this way.
Like C65, R42 and 09 are shown near J4 on the schematic and complete
the External PTT connection between U4 and J1. No testing of the
Packet components is required, but make sure all parts values are
correct and that D9 is oriented correctly .
. FX-440
Assm. 15