EHRHORN Alpha 5841 Скачать руководство пользователя страница 1

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Ehrhorn Technotogical Operations, Inc.

4975 North 30th Street

Colorado Springs, C O 80919

OPERATING AND TECHNICAL MANUAL

HIGH FREQUENCY LINEAR POWER AMPLIFIERS

MODELS PA-76, PA-76P, and PA-76C

EHRHORN TECHNOLOGICAL OPERATIONS, INC.

Revised May 1, 1977

Содержание Alpha 5841

Страница 1: ...Operations Inc 4975 North 30th Street Colorado Springs CO 80919 OPERATING AND TECHNICAL MANUAL HIGH FREQUENCY LINEAR POWER AMPLIFIERS MODELS PA 76 PA 76P and PA 76C EHRHORN TECHNOLOGICAL OPERATIONS IN...

Страница 2: ...tion At 1 KW and 2 KW Input 7 ALPHA 76P and ALPHA 7 C Operating Differences 8 Operating Notes 9 Troubleshooting Hints 10 THEORY OF OPERATION 11 ILLUSTRATIONS 13 Transformer Installation or Removal 13...

Страница 3: ...ramic metal grounded grid triodes Cooling Full cabinet ducted forced air centrifugal blower ALC Adjustable threshold negative going standard as shipped Protection Primary fuses plate overcurrent relay...

Страница 4: ...ding holes in the amplifier base plate Install the J 20 bolts and washers provided through the bottom plate and tighten securely Check both pairs of connectors visually for proper mating orienta tion...

Страница 5: ...note short loop of blue HV wire terminated in a female quick connect QC lug For normal high voltage SSB operation this blue wire is mated with another blue HV wire from the main wiring harness via the...

Страница 6: ...in the form of a matching phono connector A few transceivers such as Atlas and Drake uni t may require special connectors for tying into their internal transmit receive relay contacts NOTE When the a...

Страница 7: ...iter trans ceiver while amplifier remains ready for use Meter monitors amplifier high voltage HV 3 KV full scale OPERATE HV 2nd button Permits normal operation of ampli fier while meter monitors HV GR...

Страница 8: ...2 1400 watts rf output corresponding to approximately 2000 watts d c input In general the final operating adjustment after basic tune up should be to adjust excitation drive from the exciter or trans...

Страница 9: ...e voltage condition Check exciter rf output mike gain cw level or rf output control as applicable to insure that key down amplifier GRID current reading is about 50 75 ma 1 3 to l 2 scale On SSB set m...

Страница 10: ...operating at one kilowatt carrier or PEP input in the HI plate voltage condition the maximum drive power required is only about 50 watts typically Severe overdrive may result in serious damage to tub...

Страница 11: ...STITUTE OVERSIZED FUSES except as noted on the previous page The slo blo fuse F3 located just behind the front panel pre vents burn out of the step start resistors and HV rectifiers in the event of ab...

Страница 12: ...aks RF feedback from antenna into exciter or microphone line NOTE If exciter manufacturer does not provide instructions for adjustment of ALC set pot R40 for desired amplifier plate current swings on...

Страница 13: ...iases D15 Relay K4 switches the antenna straight through to the exciter when the amplifier is OFF or in STBY or receive conditions per mitting normal transceive operation K4 switches the ALPHA 76 into...

Страница 14: ...to close K6 via Ql T R relay K4 is prevented from closing regardless of external RELAY line conditions Hence standby cut off tube bias is maintained and rf drive cannot be applied to the tubes After t...

Страница 15: ...SECTION S ILLUSTRATIONS FIGURE 1 Transformer Installation or Removal...

Страница 16: ...1k FIC URE 3 Top View Showing Ma ior Component Locations 1 K1 K2 K3 UNDERNEATH...

Страница 17: ...2W EXCEPT SOME 3 0 2 WITH 3 3K PARALLEL SHORTEO FOR 120V M_Y A A OPTIONAL MV RELAY K3 XFMR LEAO COLORS APPLY TO STO PA 76 XFMR ONLY HIPERSIL XFMR WIRE COLORS VARY JJjjE l M CTEt ALL eU Tl 9 ALL O s IN...

Страница 18: ...I m e t e r switT hI m V ALL BUTTONS SHOV OUT N 4004 UNLESS NOTED EHRHORN TECHNOLOGICAL OPERATIONS INC Canon City Colorado MODELS P A 76 ano 76C 76P Dwg n o SCHEMATIC...

Страница 19: ...1 2 V or P B type PRD11DY0 24 DPDT lOA Guardian 905 2C 24D or Phillips 39C11D24 SYMBOL K6 K7 L5 L6 L7 L8 Lll L10 Q1 Q2 Q3 24V form A reed EAC 1A24AH 5V form A reed EAC 1A5AH 15uhy lA rfc 1 to 2 5 mhf...

Страница 20: ...ties observed ETO will furnish a new part in exchange for any covered defective part or if it is determined that factory service is required will authorize return to factory Equipment authorized for r...