Drake - L-4 - Amplificatori
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Equipaggiamento:
L-4
Data:
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Informazioni
The R L Drake Model L-4 Linear Amplifier offers continuous
2000 watt PEP-SSB, and 1000 watt D.C. CW, AM and RTTY
operation covering the ham bands 80 through 10 meters. All
frequencies 3.5 to 30 mHz may be covered with some retuning
of the input coils.
The L-4 Linear Amplifier was designed to match the TR-3 and TR-4 Radio gruppo/ricetrasmettitore'>Transceiver and T-4/T-4X Transmitter in appearance
and drive requirements to run the maximum legal input power.
The L-4 uses two 8163 or two 3-400Z zero bias triodes in a
Class B grounded grid circuit configuration that utilizes
R.F„ negative feedback for lowered odd order distortion
products.
A transmitting AGC circuit controls the exciter gain to
allow the highest average power without peak clipping. An
internal changeover relay feeds the Antenna through when the L-4 is turned off. A pair of relay contacts bias the output Tubes to cutoff, eliminating unwanted heat and diode noise
when receiving.
The output Tubes are forced-air cooled by a very quiet low
velocity, high volume internal blower. Two taut-band
suspension meters indicate plate current, grid current,
plate voltage, and relative R„F. output power.
The separate solid state Power Supply requires no warm up
period and provides excellent dynamic and static voltage
regulation.
1 Manuale
Manuale di servizio e utente
Tipo di manuale:
Manuale di servizio e utente
Pagine:
28
Dimensione:
11,3 MB
Lingua:
inglese
Revisione:
ID manuale:
Data:
Qualità:
Documento scansionato, che si legge in parte male, in parte non si legge.
Data caricamento:
09 Agosto 2017
MD5:
771c37bb-09e2-a72c-2129-5ad0b9e7ebe5
Informazioni
GENERAL SPECIFICATIONS------------------------------------ 1
DESCRIPTION------------------------------------------------ 3
INSTALLATION
INSTRUCTIONS------------------------------------------------------------------4
A. Unpacking
----------------------------------------------------------------------------------------4
B. Tube and Chimney
Installation--------------------------------------------------------4
C.
Location--------------------------------------------------------------------------------------------5
D. Power Requirements - 115 V and 230 V
Operation----------------------5
E. Jumper Connection
Diagrams--------------------------------------------------------6
F. Low Pass
Filter--------------------------------------------------------------------------------7
G Antenna Requirements----------------------------------------------------------------------7
H. Ground
Requirements----------------------------------------------------------------------7
I. Exciter Requirements
----------------------------------------------------------------------7
J. Transmitting
AGC------------------------------------------------------------------------------8
K.
VOX------------------------------------------------------------------------------------------------------8
L. Initial Connection
Diagrams----------------------------------------------------------9
M. Viewing Angle
Options--------------------------------------------------------------------10
TUNING PROCEDURE----------------------------------------- 11
A. CW, RTTY--------------------------------------------- 11
B. SSB, AM----------------------------------------------- 13
OPERATION---------------------------------------------------14
A. CW, RTTY----------------------------------------------14
B. SSB--------------------------------------------------- 14
C. AM----------------------------------------------------15
THEORY OF OPERATION-------------------------------------- 16
SERVICE DATA-----------------------------------------------17
A Amplifier 17
1. Removing Top Cover---------------------------------17
2. Removing Bottom Cover-------------------------------17
3. Removing Front Panel---------------------------------17
4. Cleaning Amplifier Compartment-----------------------17
5. Tube Replacement-----------------------------------18
6. Input Switch Drive Belt Replacement-------------------18
7. Troubleshooting ------------------------------------ 18
B Power Supply 19
1. Circuit Breaker Reset
--------------------------------------------------------------19
2. Removing Bottom Cover
------------------------------------------------------------19
3. Removing Top Cover---------------------------------19
4.
Troubleshooting------------------------------------------------------------------------19
ALIGNMENT------------------------------------------------- 21
A. Input Coil Adjustment ----------------------------------- 21
B. Meter Adjustment--------------------------------------- 21
C. Knob Pointer Alignment----------------------------------- 22
SCHEMATICS----------------------------------------------------
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