Hallicrafters SR-150 Operation And Maintenance Manual page 48

PERFORMANCE SPECIFICATION FOR THE SR-150
H. RF Power Output Limits (CW operation)
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I. Overall Audio Frequency Response (SSB)
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J. VOX Sensitivity Limits
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K. Anti-Trip Sensitivity Limits
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By Walter Cates WD0GOF (UPDATE 10/30/2013)
The keying envelope shall be smooth with no sharp peaks in leading edge or training
edge transients.
With the RF LEVEL control set at minimum, there shall be no more than 2 watts output
on any band.
Output Limits
3.5 mc - - - - 75 W min
7.0 mc - - - - 70 W min
14.0 mc - - - - 70 W min
21.0 mc - - - - 60 W min
28.0 mc - - - - 50 W min
Audio input a required. MIC GAIN control set at maximum.
0 dB (reference) 1000 cps 50 volts RMS RF output.
Response Limits (either sideband).
-3 dB limit at 400 to 600 cps. With 100 cps max difference between usb and lsb.
-3 dB limit at 2700cps to 3200 cps
Pass band peak to valley ratio shall be less than 2 db.
Audio input - 1000 cps
With VOX sensitivity at maximum and the delay control set ¼ turn from minimum delay,
no more than 5 mv RMS shall be required to close the vox relay.
Receiver adjusted to provide 250 mw 1000 cps audio output for the test.
The VOX sensitivity shall be reduced to 250 mv RMS to close the VOX relay or block
the relay operation completely.
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