40
By Walter Cates WD0GOF (UPDATE 10/30/2013)
4-2. RECEIVER PERFORMANCE
:
Sensitivity
The receiver will produce 500 mw audio out with 1.5 uv RF signal at the antenna terminal on the 80 and 40
meter bands. All other bands will produce 500 mw with 1.0 uv or less
BAND
TEST FREQ
SIG REQ FOR 500mw
80
40
20
15
*10 opt 1
10 std
*10 opt 2
*10 opt 3
* Tests performed only if options are installed
(S+N:N)
A 1.0uv signal at the antenna terminal will produce a minimum 20db s+n:n. Factory procedure states ref. level
is set with 1.0uv at the antenna, signal source is then disconnected and replaced by a 50 ohm resistive load. The
resulting reduction in audio output will be 20db or greater.
BAND
TEST FREQ
SIGNAL LEVEL
S+N:N MEASURED
80
40
20
15
*10 opt 1
10 std
*10 opt 2
*10 opt 3
AGC Figure of merit
With a signal at the antenna terminal from 5uv to 1500uv no more than a 10 dB variation in the audio output
shall occur.
MEASURED CHANGE
dB
“S” METER CAL
The S meter will read S-9 when between 25 and 100uv are injected at the antenna terminal.
SIGNAL FOR S9
uv
By Walter Cates WD0GOF (UPDATE 6/5/2013)
43
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...
