41
By Walter Cates WD0GOF (UPDATE 10/30/2013)
SR-150
4-3. TRANSMITTER PERFORMANCE
:
Tests performed with 50ohm resistive load. Measurements made with BIRD avg power and PEP power meter.
Hi voltage _
_
vdc B+
__
vdc Bias -
__
vdc
Final amplifier bias
set to 70 ma SSB mode zero drive. _________
Neutralization
performed @ 21.3 MHZ. _______
Carrier balance
null (> 50db) _____ dB below full power output level.
Microphone input sensitivity
at 1000 Hz. A signal level not more than 4mv RMS shall produce the minimum
specified SSB output at specified freq. Mic gain set just below saturation.
THE “ADVERTISED” INPUT POWER IN SSB MODE IS 150 WATTS.
Flat-topping occurred at
__
% of mic gain rotation.
FREQ
MIN SPEC
PEP @ 4mv
3.8 MHz
75 W min
7.3 MHz
75 W min
14.3 MHz
70 W min
21.3 MHz
60 W min
28.8 MHz
50 W min
THE “ADVERTISED” INPUT POWER IN CW MODE IS 125 WATTS.
CW power output
with RF level set just to saturation level.
FREQ
MIN SPEC
AVG POWER
3.8 MHz
75 W min
7.3 MHz
70 W min
14.3 MHz
70 W min
21.3 MHz
60 W min
28.8 MHz
50 W min
SSB TX AUDIO RESPONSE
:
From 600 Hz thru 2700 Hz no more than 3 dB change in output power. ______dB
If multiple peaks occur within the pass band there will be no more than 2db from the
peak to valley between. _______dB
VOX GAIN
: Set for key at ____ millivolts.
VOX DELAY
: Set for ____ second hold.
QT
set for no key with receiver audio output at 1.5 watts and below _____.
By Walter Cates WD0GOF (UPDATE 6/5/2013)
44
Summary of Contents for SR-150
Page 18: ...By Walter Cates WD0GOF UPDATE 10 30 2013 18...
Page 19: ...By Walter Cates WD0GOF UPDATE 10 30 2013 19 BEFORE CLEANING CLEAN CHASSIS...
Page 20: ...By Walter Cates WD0GOF UPDATE 10 30 2013 20 3 1 2 TUBE SOCKET CLEANING KIT...
Page 21: ...By Walter Cates WD0GOF UPDATE 10 30 2013 21 3 1 3 AIR VARIABLE CLEANING...
Page 30: ...By Walter Cates WD0GOF UPDATE 10 30 2013 30 3 5 5 K3 WIRING AND PIN OUT...
Page 38: ...By Walter Cates WD0GOF UPDATE 10 30 2013 38 4 DATA SHEETS...
