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The Collins 30 L-1 Linear Amplifier has 1000 watts PEP power input on SSB and 1000 watts average on CW on all bands.  It can be driven by the Collins 32S transmitters, Collins KWM-2 or KWM-1 transceivers, or most 70-100 watt exciters.  It is finished in the same attractive light gray as the S/Line equipment and the KWM-2. This linear amplifier is completely self-contained and designed for for table-top use.  The CC-2 carrying case is designed for transporting the 30L-1.

The 30L-1 features:
  • Automatic Load Control allowing a high average level of modulation and optimum power output from the amplifier, within the rated limits of distortion;
  • RF Inverse Feedback reduces distortion products giving clean signal on the air;
  • Solid State Rectifier resulting in head reduction;
  • Self-Contained Power Supply with safe interlock circuits for grounding the high voltage when the cover is removed; and
  • Automatic Antenna Transfer On The On-Off Switch permits the 30L-1 to be switched in or out of the circuit at will by operating the switch.
The 30L-1 provides SSB and CW emission and covers the 80, 40, 20, 15, and 10 meter bands.  Provisions are made for general coverage use, too.  Automatic Load Control voltage from the 30L-1 is fed back to the exciter, providing maximum talking power without overdriving and distortion.  In combination with RF inverse feedback, Collins' exclusive Automatic Load Control provides not only more power, but a sharper signal.

The 30L-1 is a grounded grid with four 811A Triodes.   The 811As are instantly heated; thus there is no delay in warm-up.

Indicating devices on the 30L-1 include a panel meter monitoring final amplifier plate current, plate voltage, and tuning circuit.  With the meter switch in tune position, the 30L-1 uses an exclusive comparator circuit which can be operated by simply adjusting tuning and loading controls to zero the meter.

The unit can be operated outside amateur band limits; however, returning the input circuits may be necessary.  Such returning presents the proper load impedance to the exciter.

Other 30L-1 Specifications
  • 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.
  • Noise Level: 40 db below one tone carrier.
  • Size: With feet - 14 3/4" wide, 7 3/4" high, 13 3/4 depth.
  • Weight: 38 lbs.
  • Output impedance:  Variable.  Nominally 50 ohms unbalanced with not more than 2:1 SWR on the amateur bands.
Information from Collins Amateur Radio Equipment Catalog No. 32

Click on thumbnails for larger pictures.

Front of 30L-1 Linear Amplifier      Front of 30L-1 Linear Amplifier      Back of 30L-1 Linear Amplifier

Inside top of 30L-1 Linear Amplifier


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