Lafayette HE-30 - Page 4

468
L(Feet]= =e GueNcy (Me)
300 OHM
TWIN. WIRE
Al A2 E
©) Ce TO GROUND. © (3) - (To GROUND
(OPTIONAL) cae (OPTIONAL)
%
st
ae
FIGURE 1. FIGURE 2 4
Single Wire Antenna {inverted LU) Doublet Antenna 3
Since the doublet antenna displays directional properties broadside to its length, it should be oriented “al
in such a manner that maximum signal pickup can be realized, oe
“nd
When using either a balanced transmission line or a twisted pair, the leads connect to terminals "Al" ee
S and ''A2" respectively, and the jumper wire between "A2" and "E" is removed. A height of 30-50 feet r
e is” recommended for good reception of weak signals, — t
"| FUSE
. A 2 amp fuse is located at the rear of the receiver. To remove it, unscrew the spring loaded cap. Re-
place only with one of a similar rating.
AUXILIARY CONTROL
‘ A socket in the back of the’ receiver allows simultaneous control of this receiver with a transmitter. An
external switching device can be constructed so that the receiver will be inoperative during periods of
mee transmission, In this case, the FUNCTION switch is
AUXILIARY SOCKET placed in the SEND position. The external switch is
attached to the 5-pin plug so that pins 3 and 2 (see
Fig. 3) will be connected when signal reception:is de-
G TO EXTERNAL . sired. This. plug is then inserted into the socket in
SWITCH place of the jurnper plug. In this manner, signal re-
ception will be instantaneous, as plate voltage will be.‘
applied to the RF stages wher the switch is closed ac-
Concetehy:
‘howe t
pe
Lisi Zh hehe ass
FIGURE 3 For normal operating conditions with no external - >>
- switching, the jumper plug provided must be inserted
if Auxiliary Control Socket into the socket, Pins 3 and 2 of the plug are shorted, :. ~
x thus providing plate voltage to the RF stages, To disable the receiver under these conditions, set the ~”:
, "4 FUNCTION switch to the SEND position, In this position plate voltages to the RF stages are cut off,
a= Returning the switch.to REC AM will provide instantaneous signal reception, :
et e