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Woody's 
COLLINS 30L-1 HF Linear Amplifier
W0UI


This linear amplifier has always performed well. 
Really all it could use currently is a new AC Power Cord.
Additional pictures are pending as I work on it.


THIS IS A WORK IN PROGRESS and is not done yet. 
Check back from time-to-time.


30L-1 SPECIFICATIONS

FREQUENCY RANGE: 3.4 - 30.0 mc
covering 80, 40, 20, 15 and 10 meter amateur bands.
BY retuning input circuit as necessary, the following general
    coverage bands can he accommodated:
FREQUENCY BAND      TOTAL COVERAGE
   3.5  mc            3.4- 5.0  mc
   7.0  mc            6.5- 9.5  mc
  14.0  mc            9.5-16.0  mc
  21.0  mc           16.0-22.0  mc
  28.0  mc           22.0-30.0  mc
MODE: SSB or CW.
TYPE OF SERVICE: 
Attended operation SSB continuous; CW 50% duty cycle.

POWER REQUIREMENTS: 115 v or 230 v, 50-60 cps; 
CW,key closed,1200 watts ac; 
SSB, no modulation, 300 watts ac; 
SSB, speech modulated, 550 watts ac.
DRIVE POWER: 70 - 100 watts for full output.
PLATE POWER INPUT: 1000) watts PEP on SSB; 1000 watts on CW on all bands.
POWER OUTPUT: 500 watts PEP into 50 ohms on all bands.
HARMONIC AND OTHER SPURIOUS RADIATION: Second harmonic -40 db;
    third order distortion -30 db at full output.
NOISE LEVEL: 40 db below one tone carrier.
AMBIENT TEMPERATURE: 0 - 50 C.
AMBIENT HUMIDITY RANGE: 0% - 90%.
ALTITUDE: 0-10,000 ft.
PROTECTIVE DEVICES: All removable panels interlocked.
    Input line fused - 8 amps on each side.
SIZE: With feet - 14-3/4" W, 7-3/4" H, 13-3/4" D.
WEIGHT: 38 Lbs. (17.24 kg) .
OUTPUT IMPEDANCE: Variable. Nominally 50 ohms unbalanced with not 
   more than 2:1 SWR on the amateur hands.
AUDIO COMPRESSION CHARACTERISTICS: 
ALC operates from the amplifier RF plate voltage. 
Threshold is adjustable and factory preset

Collins 30L-1  PDF Schematic  (6.27 MB)
CLICK HERE to email Woody

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WARNING!! 
There are High Voltages with enough punch to easily kill you 
exposed all over inside these old rigs
both above and below the chassis.
The capacitors can hold a lethal charge 
well after voltage is turned off and the rig is unplugged. 
Make sure to bleed off capacitors with an insulated and grounded screw driver 
before touching anything 
even after the unit is physically unplugged from the AC outlet.

Remember the old ham radio and electronics practice... 
Work on the radio one handed leaving one hand behind your back.
If you have both hands inside the unit and accidentally touch a lead or brush a capacitor
current could potentially pass through your body and stop your heart.

Always instruct others to turn off the circuit breaker 
or unplug the radio 
before touching you if you are bit else they might be electrocuted, too.

ABOVE CHASSIS

   
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UNDER CHASSIS

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TRANSFORMERS

   
   



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OTHER RELATED COLLINS 30L-1 WEB PAGES:
Restoration Work
Radio Wrench
OnLine Collins 30L-1 Manual in HTML
.
YouTube about Tuning the Collins 30L-1 Linear Amplifier
YouTube overview of the Collins 30L-1 amplifier
.
.

Since 5 April, 2013:


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All personal materials, comments, pictures copyright 1997-2013 R  Linwood (4L RANCH)