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Specifications: Power amplifier

Parameter

Min.

Typ.

Max.

Remarks

Frequency 
range

138 MHz

174 MHz

Maximum 
output power

80Watt

85Watt

90Watt

ALC limited

Input power 
range

1 Watt

7 Watt

Between carrier detect and 
overdrive thresholds

Input power for 
full output

3 Watt

5 Watt

Frequency dependent

Bypass power

50 Watt

Harmonics 
suppression

65dBc

Modulation 

AM, FM, SSB

Circuit type 

Twin MOSFET, PUSH-PULL

Specifications: Receiver preamplifier

 In-band gain

18dB

21dB

24dB

138 MHz - 174 MHz

Out-of-band 
gain

19dB

@ 108 MHz

8 dB

@ 88 MHz

-50 dB

@ 30 MHz

Noise figure

2.4 dB

3 dB

Specifications: General

DC supply 
voltage

10.5 V

12.6 V

14.8 V

Operation at low end of range 
may not yield specified 
maximum power

Transmit 
supply current

10 A

13 A

Transmitting at maximum 
power. Frequency dependent.

Standby supply 
current

20 mA

All functions OFF

35 mA

TX PA enabled

80 mA

RX LNA enabled

88 mA

TX PA and RX LNA enabled

RF connector

UHF (SO-239)

Weight

1.15 kG

Dimensions

H=50mm, W=125mm, L=210mm

Summary of Contents for PA-85V

Page 1: ...VHF POWER AMPLIFIER PA 85V User Manual ...

Page 2: ...s actual power limit 25 45 65 85 Watt SWR measurement Green Dot No Shows VSWR Error indicator Red Dot s No Indicates error condition Blinks on under overrange Pushbuttons function Name Function RX LNA Toggles operation of receiver pre amplifier LNA TX PA Toggles operation of transmit power amplifier SSB ON Toggles SSB mode SET POWER Displays changes transmit power limit SHOW SWR Enables SWR displa...

Page 3: ...ier exits power setting mode if SET POWER button is not pressed again within 2 seconds Automatic Level Control is of saturated nonlinear type only suitable for FM modulation While using amplifier with AM SSB modulations set ALC threshold to maximum power 85W then adjust transceiver power to yield appropriate power displayed on bargraph For AM modulation carrier power should not exceed 20 25W to ac...

Page 4: ...surement result fairly independent on output power It also offers exceptional directivity with residual VSWR reading in order of 1 10 Error signalling To signal error in amplifier operation multifunction display bar LEDs change color to red Apperance of any error denies power amplifier transmit operation Error LED Meaning Amplifier reaction HIGH SWR Excessive VSWR over 2 1 detected Typically cause...

Page 5: ...SFET PUSH PULL Specifications Receiver preamplifier In band gain 18dB 21dB 24dB 138 MHz 174 MHz Out of band gain 19dB 108 MHz 8 dB 88 MHz 50 dB 30 MHz Noise figure 2 4 dB 3 dB Specifications General DC supply voltage 10 5 V 12 6 V 14 8 V Operation at low end of range may not yield specified maximum power Transmit supply current 10 A 13 A Transmitting at maximum power Frequency dependent Standby su...

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