Hammarlund SP600-JX17
Performance Test

Hammarlund SP600-JX17

Hammarlund SP600-JX17

Band MDS Blocking Two-tone D.R.
(20 kHz) (20 kHz)
 
80 meters -140 dBm 106 dB 79 dB
40 meters -140 dBm 106 dB 78 dB
20 meters -139 dBm 108 dB 77 dB

AM Audio S/N: 54 dB




AM Audio Frequency Response:

 
100 Hz 200 Hz 400 Hz 600 Hz 800 Hz 1 kHz 2 kHz 3 kHz 4 kHz 5 kHz 6 kHz
 
-6 dB -1 dB 0 dB 0 dB 0 dB 0 dB 0 dB -1 dB -2 dB -2 dB -2 dB

AM Audio Distortion:

 
Mod% 100 Hz 200 Hz 400 Hz 600 Hz 800 Hz 1 kHz 2 kHz
 
30% 7.1% 4.0% 3.2% 3.2% 3.2% 3.2% 3.2%
50% 7.9% 5.0% 4.0% 3.5% 3.5% 3.5% 3.5%
70% 10% 5.6% 4.5% 4.5% 4.0% 4.0% 4.0%
90% 11% 6.3% 5.6% 5.0% 5.0% 4.5% 4.5%
100% 13% 7.1% 5.6% 5.6% 5.6% 5.6% 4.5%

Notes: Maximum i-f bandwidth is about 13 kHz @ -6 dB.

AM distortion numbers show the somewhat typical increase at lower audio frequencies - most often caused by the low audio frequencies riding on the AGC line. Also there is the usual increase in audio distortion as the modulation percentage increases. This is due to the detector's inability to cleanly demodulate the higher amplitude levels.