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By Walter Cates WD0GOF (UPDATE 10/30/2013)
PERFORMANCE SPECIFICATION FOR THE SR-150
B.
Standard audio output 500 milliwatts into 3.2 ohm load.
C.
Antenna input impedance - 50 ohms (nominal). Audio output impedance 3.2 and 500 ohms.
D.
Measurements made with Hewlett-Packard Model HP-606A
E.
Test signal – unmodulated CW signal.
F.
Frequency Data (1
st
I.F. = 6.0 to 6.5mc, 2
nd
I.F. = 1650 for all bands)
Band
Tuning Range
3.5 MC
3.5 - 4.0 MC
7.0 MC
7.0 - 7.5 MC
14.0 MC
14.0 - 14.5 MC
21.0 MC
21.0 - 21.5 MC
28.0 MC
28.0 - 28.5 MC
28.5 MC
28.5 - 29.0 MC
29.0 MC
29.0 - 29.5 MC
29.5 MC
29.5 - 30.0 MC
G.
Overall Sensitivity Limits (gain check)
1.
A 1.5 microvolt signal on the 3.5 and 7.0 mc bands shall produce 500mw audio output. A
1.0 microvolt signal shall produce 500 mw audio output on all other bands. (Adjust signal
generator frequency for maximum recovered audio output.)
2.
The gain variation on all bands except the 7.0 mc band shall not exceed 3 db. The gain
variation on the 7.0 mc band shall not exceed 6 db. (Measure input variation for constant
output).
H.
Overall Sensitivity Limits (20 dB S/N)
A 1.0 microvolt unmodulated signal shall produce an audio output signal at least 20 dB above
the internal noise level of the receiver as the receiver is tuned through the signal. (Check at least
one spot on each band.)
I.
The change in sensitivity between upper and lower sideband reception shall not exceed
2 dB audio output. (1 microvolt signal input and AF GAIN adjusted for 100mw.)
Содержание SR-150
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Страница 20: ...By Walter Cates WD0GOF UPDATE 10 30 2013 20 3 1 2 TUBE SOCKET CLEANING KIT...
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