Hizh-Frecuency Transaitter (cont).
Power requirements:
Filsnect:
Plate:
7-2 v7 DC, 1.0 «ap
2.5 kv, 500 sicrsanps
Power source:
Filament:
Plate:
7-2 v, 1.5 ab capaciry
Transistor power supply, 7.2 v ta
2.5 kv, 250 ma input
Antenns:
Trailing dipole whips, 3/% wavelength,
20° to missile longitedinal axis, vith
reflectors
Beam width to
7.2.5
half-power points:
42°
Gain:
4 @d
Receiving Station Description
A block diagram of the two receiving stations is shown in Fig. 7.9.
Basically, the transuitted signal is received by a high-gain helical antenna,
amplified by an BF amplifier, Jziected in a receiver, and recorded on both
paper oscillographs and magnetic tape recorders.
4n ASCOP prezuplifier and
multicoupler are used at 225 mc for amplification and coupling; a traveling
wave tube amplifier is used at 1500 mc.
The signal from the cathode of the
S-weter tube of the National 300 low-frequency receiver, through a cathode
follower, is recorded on a Miller paper oscillograph in parallel with an
aupex G00 magnetic tape recorder.
to the received signal.
This recorded signal varies in proportica
The 80-kc I-? of the National receiver is recorded
directly by the Ampex tape recorder to measure large phase variations in the
low-frequency transmitted signal.
In measuring phase variation below 100 cps,
the 80-ke I-F is also mixed with a local oscillator, which is stable ami aanwally adjustable, and is sent through a cathode follcower to the Miller oscillograph for recording.
From a differential amplifier ac the detector end of
the hoO-mc I-F in the high-frequency Polarad receivers, a signal proportional
to the peak power of the transmitters is fed through a DC amplifier to borh
the Miller aod the Ampex recorders.
Low-FrecuencyReceiving Ecuiscmect:
Antenna:
Helix, J-turn, 14 db gain, 44° beas width
RF amplifier:
ASCOP mlticoupler, Model AMC-2, 9-<b gain,
9.5-db noise figure
2S