30L-1 Summary
Year manufactured: 1961 - 1975
New Price in 1961: $520
Price in 1977: $1,536
Frequency coverage: Ham bands 80 - 10 meters
Operating modes: CW and SSB
Input Power: 1,000 watts PEP
Output Power: about 600 - 650 watts PEP
Power Tubes: four each 811A
Size: 14 3/4" W, 7 3/4" H, 14" D (with feet)
Weight: 38 lbs
Description of the 30L-1
The Collins 30L-1 is a grounded grid
linear amplifier using four 811 A triode tubes. The amplifier generates 1000
watts PEP power input on SSB and 1000 watts average on CW. Power output is
approximately 600 watts PEP. It can
be driven by the Collins 32S-3 Transmitter, the Collins KWM-2/2A Transceiver, or
nearly any 70-100 watt exciter. Finished in the same attractive light gray as
Collins' classic S/Line equipment and the KWM-2, the 30L-1 has all the controls
conveniently accessible on the front panel.
The 30L-1 provides SSB and CW operation and covers the 80, 40, 20, 15, and 10
meter bands; however, provisions were made for general coverage operation.
Automatic load control provides maximum talking power without over-driving and
distortion, resulting in a cleaner signal.
The 811 A tubes can be replaced without removing the unit from the cabinet. The
tubes are instantly heated so that there is no warm up delay. With the meter
switch in tune position, the 30L-1 uses an exclusive comparator circuit allowing
operation by simply adjusting the loading and tuning controls to zero the meter.
The 30L-1's RF and power supply compartment covers operate safety interlock
switches. Cover removal during operation closes these switches and shorts the
high voltage to ground. The unit is operable outside of the amateur bands;
however, retuning of the input circuits may be necessary.
Specifications
FREQUENCY RANGE: The 80, 40, 20, 15 and 10 meter amateur bands. By retuning
input circuits, these additional general coverage
bands may be utilized: (3.5 MHz): 3.4-5.0 MHz; (7.0 MHz): 6.5-9.5
MHz;
(14.0 MHz): 9.5-16.0 MHz; (21.0 MHz): 16.0-22.0 MHz; (28.0
MHz): 22.0-30.0 MHz
MODE: SSB or CW.
TYPE OF SERVICE: Attended operation SSB, continuous; CW, 5 min. key down,
15 min. off (standby).
POWER REQUIREMENTS: 115 vac or 230 vac, 50-60 Hz; CW, key closed, 1200
watts;
SSB, no signal, 300 watts; SSB, speech signal, 550 watts.
DRIVE POWER: 70-100 watts for full output.
PLATE POWER INPUT: 1000 watts PEP on SSB; 1000 watts on CW on all bands.
HARMONIC AND OTHER SPURIOUS RADIATION: Second harmonic -40 db; third order
distortion -30 db.
NOISE LEVEL: 40 db below single tone carrier.
ALTITUDE: 0-10,000 ft.
PROTECTIVE DEVICES: All removable panels interlocked. Input line fused 8
amps
on each side.
OUTPUT IMPEDANCE: Variable. Nominally 50 ohms unbalanced with not more
than 2:1
VSWR on the amateur bands.
AUDIO COMPRESSION CHARACTERISTICS: ALC operates from the amplifier RF
plate voltage.
Threshold is adjustable and factory preset.
AMBIENT TEMPERATURE: 0 degrees C-50 degrees C.
AMBIENT HUMIDITY RANGE: 0%-90%.
SIZE: With feet 14 3/4" W, 7 3/4" H, 14" D (37.47 cm W,
19.69 cm H, 35.56 cm D).
WEIGHT: 38 lbs. (17.24 kg).