| Frequency Range (Megahertz) |
3.5 to 4.0, 7.0 to 7.3, 14.0 to 14.5, 15.0 to 15.3, 21.0 to 21.5,
28.0 to 30. |
| Intermediate Frequency (IF) |
3.395 MHz |
| Frequency Stability |
Less than 100 Hz per hour after 10 minutes warmup under normal
ambient conditions. Less than 100 Hz drift for ±10% line voltage
variation. |
| Frequency Selection |
Built-in LMO (Linear Master Oscillator). |
| Modes of Operations |
|
| SSB |
Single sideband (suppressed carrier, with selectable upper or lower
sideband). |
| CW |
Keyed continuous wave. |
| AM |
Amplitude modulated continuous wave. |
| RTTY |
Radio Teletype (frequency-shift keyed continuous wave).Wide shift,
narrow shift and narrow CW shift identification. |
| Sensitivity |
Less than 0.25 microvolt for 10 dB signal-plus-noise to noise ratio
for SSB operation. |
| Overall Gain |
Less than 1.5 microvolt input for 0.5 watts audio output (single
tone SSB). |
| AGC Characteristic |
|
| Blocking |
Greater than 3.0 V CW/SSB/RTTY. |
| Dynamic Range |
Greater than 150 dB CW/SSB. |
| RF Attenuator Range |
0-40 dB nominal. |
| Selectivity |
|
| SSB |
2.1 KHz 6 dB down, 5.0 KHz maximum at 60 dB down (crystal filter
supplied). |
| CW |
400 Hz at 6 dB down, 2.0 KHz maximum at 60 dB down (crystal filter
available as an accessory). |
| AM |
3.75 KHz 6 at dB down, 10 KHz maximum at 60 dB down (crystal filter
available as an accessory). |
| RTTY |
2.1 KHz at 6 dB down, 5.0 KHz maximum at 60 dB down (uses SSB crystal filter). |
| Image Rejection |
60 dB or better. |
| IF Rejection |
|
| 3.395 |
Greater than 55 dB. |
| 8.595 |
Greater than 50 dB. |
| Spurious Response |
All below 1 microvolt equivalent signal input. |
| Temperature Range |
10º C to 50º C ambient. |
| Dial Accuracy |
|
| Electrical |
Within 40 Hz after calibration at nearest 100 KHz or 25 KHz point. |
| Visual |
Within 200 Hz. |
| Variation in RTTY shift as LMO is changed (shift can be adjusted to
nominal value at any point within the band). |
|
| CW shift (50 Hz nominal) |
Less than 10 Hz/100 KHz. |
| Narrow Shift (170 Hz nominal) |
Less than 20 Hz/100 KHz. |
| Wide Shift (850 Hz nominal) |
Less than 100 Hz/100 KHz. |
| Calibration |
Every 100 KHz or 25 KHz. |
| Dial Backlash |
No more than 50 Hz. |
| Antenna Input Impedance |
50 Ω nominal unbalanced. |
| Audio Response |
|
| SSB |
350 to 2450 Hz nominal at 6 dB. |
| CW (with accessory filter) |
800 to 1200 Hz nominal at 6 dB. |
| AM (with accessory filter) |
200 to 3500 Hz nominal at 6 dB. |
| RTTY |
1840 to 3940 Hz nominal at 6 dB. |
| Audio Output Impedance |
|
| Matching Speaker |
8 Ω. |
| Matching Headphones |
Low impedance. |
| Audio Output Power |
4 watts at less than 10% distortion. |
| Muting |
Open external ground at Mute socket. |
| Power Requirements |
105 to 130 or 210 to 260 volt ac, 40 watts maximum. |
| Controls |
|
| Front Panel |
Main Tuning dial.
Function switch.
Mode switch.
Band
switch.
AGC switch.
Converter switch.
AF Gain control/Power
on-off.
RF Gain/Speaker Disable.
Preselector.
RF Attenuator. |
| Circuit Boards |
|
| IF/Audio |
Bias adjust.
Meter Zero.
Meter Full Scale. |
| PS/BFO |
+15 V adjust.
100 KHz adjust. |
| RTTY |
Wide Shift.
Narrow Shift.
CW shift. |
| Connections |
|
| Rear Panel |
Phones.
HF Antenna.
VHF Antenna #1.
VHF
Antenna #2.
Mute.
Anti-Vox.
Speaker.
HFO out.
LMO out.
BFO out.
CW shift.
4-Spare sockets.
3-Wire line cord socket.
Accessory socket (RTTY and VHF converter connections). |
| NOTE: Specifications measured with 120 Vac line
voltage at 25° C. |
|
| Cabinet Dimensions |
12-1/4" wide x 6-5/8" high x 13" deep. |
| Overall Dimensions (with knobs and feet
installed) |
12-1/4" wide x 7-15/16" high x 14" deep. |
| Net Weight |
15-3/4 lbs. |
