Difference between revisions of "EF Johnson Challenger Series Information"

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Line 10: Line 10:
 
The UHF units were 717x and 718x (the 7x were 1st generation and 8x were 2nd generation)
 
The UHF units were 717x and 718x (the 7x were 1st generation and 8x were 2nd generation)
  
 +
;7151
 +
:'''Band:''' VHF
 +
:'''Channels:''' 2 Channel
 +
:'''Output:''' 25 Watts
 +
7152
 +
:'''Band:''' VHF
 +
:'''Channels:''' 8 Channel
 +
:'''Output:''' 25 Watts
 +
7153
 +
:'''Band:''' VHF
 +
:'''Channels:''' 2 Channel
 +
:'''Output:''' 40 Watts
 +
7154
 +
:'''Band:''' VHF
 +
:'''Channels:''' 8 Channel
 +
:'''Output:''' 40 Watts
 +
7155
 +
:'''Band:''' VHF
 +
:'''Channels:''' 20 Channel
 +
:'''Output:''' 40 Watts
 +
7156
 +
:'''Band:''' VHF
 +
:'''Channels:''' 99 Channel
 +
:'''Output:''' 40 Watts
 +
7157
 +
:'''Band:''' VHF
 +
:'''Channels:''' 99 Channel
 +
:'''Output:''' 100 Watts
 +
7161
 +
:'''Band:''' VHF
 +
:'''Channels:''' 2 Channel
 +
:'''Output:''' 25 Watts
 +
7162
 +
:'''Band:''' VHF
 +
:'''Channels:''' 8 Channel
 +
:'''Output:''' 25 Watts
 +
7163
 +
:'''Band:''' VHF
 +
:'''Channels:''' 2 Channel
 +
:'''Output:''' 40 Watts
 +
7164
 +
:'''Band:''' VHF
 +
:'''Channels:''' 8 Channel
 +
:'''Output:''' 40 Watts
 +
7165
 +
:'''Band:''' VHF
 +
:'''Channels:''' 20 Channel
 +
:'''Output:''' 40 Watts
 +
7166
 +
:'''Band:''' VHF
 +
:'''Channels:''' 99 Channel
 +
:'''Output:''' 40 Watts
 +
7167
 +
:'''Band:''' VHF
 +
:'''Channels:''' 99 Channel
 +
:'''Output:''' 100 Watts
 +
7171
 +
:'''Band:''' UHF
 +
:'''Channels:''' 2 Channel
 +
:'''Output:''' 15 Watts
 +
7172
 +
:'''Band:''' UHF
 +
:'''Channels:''' 8 Channel
 +
:'''Output:''' 15 Watts
 +
7173
 +
:'''Band:''' UHF
 +
:'''Channels:''' 2 Channel
 +
:'''Output:''' 35 Watts
 +
7174
 +
:'''Band:''' UHF
 +
:'''Channels:''' 8 Channel
 +
:'''Output:''' 35 Watts
 +
7175
 +
:'''Band:''' UHF
 +
:'''Channels:''' 20 Channel
 +
:'''Output:''' 35 Watts
 +
7176
 +
:'''Band:''' UHF
 +
:'''Channels:''' 99 Channel
 +
:'''Output:''' 35 Watts
 +
7177
 +
:'''Band:''' UHF
 +
:'''Channels:''' 99 Channel
 +
:'''Output:''' 80 Watts
 +
7181
 +
:'''Band:''' UHF
 +
:'''Channels:''' 2 Channel
 +
:'''Output:''' 15 Watts
 +
7182
 +
:'''Band:''' UHF
 +
:'''Channels:''' 8 Channel
 +
:'''Output:''' 15 Watts
 +
7183
 +
:'''Band:''' UHF
 +
:'''Channels:''' 2 Channel
 +
:'''Output:''' 35 Watts
 +
7184
 +
:'''Band:''' UHF
 +
:'''Channels:''' 8 Channel
 +
:'''Output:''' 35 Watts
 +
7185
 +
:'''Band:''' UHF
 +
:'''Channels:''' 20 Channel
 +
:'''Output:''' 35 Watts
 +
7186
 +
:'''Band:''' UHF
 +
:'''Channels:''' 99 Channel
 +
:'''Output:''' 35 Watts
 +
7187
 +
:'''Band:''' UHF
 +
:'''Channels:''' 99 Channel
 +
:'''Output:''' 80 Watts
  
 
The following numbers replace the x as mentioned above:
 
The following numbers replace the x as mentioned above:
Line 29: Line 141:
  
 
If it had a -5 after the number it was a remote mount system
 
If it had a -5 after the number it was a remote mount system
 
 
  
 
===Radio Identification by Images===
 
===Radio Identification by Images===

Revision as of 01:23, 30 December 2012

EF Johnson Series Radio Information

these are very versatile radios, they will easily move into the ham bands VHF and UHF models. The logic boards can be swapped between models and reprogrammed so that you can make a 2 Channel VHF a 99 channel by just replacing the logic board and reprogramming. The boards between UHF and VHF are fully interchangeable. I have also converted non-remote models to remote and vice versa. Converting Dash Mount EF Johnson Challenger Radios to Remote Mount


Model Number Decoding

In a posting on the EFJ yahoogroup a gentleman reported that the model numbers in the 71xx series of Challengers were organized such that: The VHF units were 715x and 716x (the 5x were 1st generation and 6x were 2nd generation)

The UHF units were 717x and 718x (the 7x were 1st generation and 8x were 2nd generation)

7151
Band: VHF
Channels: 2 Channel
Output: 25 Watts

7152

Band: VHF
Channels: 8 Channel
Output: 25 Watts

7153

Band: VHF
Channels: 2 Channel
Output: 40 Watts

7154

Band: VHF
Channels: 8 Channel
Output: 40 Watts

7155

Band: VHF
Channels: 20 Channel
Output: 40 Watts

7156

Band: VHF
Channels: 99 Channel
Output: 40 Watts

7157

Band: VHF
Channels: 99 Channel
Output: 100 Watts

7161

Band: VHF
Channels: 2 Channel
Output: 25 Watts

7162

Band: VHF
Channels: 8 Channel
Output: 25 Watts

7163

Band: VHF
Channels: 2 Channel
Output: 40 Watts

7164

Band: VHF
Channels: 8 Channel
Output: 40 Watts

7165

Band: VHF
Channels: 20 Channel
Output: 40 Watts

7166

Band: VHF
Channels: 99 Channel
Output: 40 Watts

7167

Band: VHF
Channels: 99 Channel
Output: 100 Watts

7171

Band: UHF
Channels: 2 Channel
Output: 15 Watts

7172

Band: UHF
Channels: 8 Channel
Output: 15 Watts

7173

Band: UHF
Channels: 2 Channel
Output: 35 Watts

7174

Band: UHF
Channels: 8 Channel
Output: 35 Watts

7175

Band: UHF
Channels: 20 Channel
Output: 35 Watts

7176

Band: UHF
Channels: 99 Channel
Output: 35 Watts

7177

Band: UHF
Channels: 99 Channel
Output: 80 Watts

7181

Band: UHF
Channels: 2 Channel
Output: 15 Watts

7182

Band: UHF
Channels: 8 Channel
Output: 15 Watts

7183

Band: UHF
Channels: 2 Channel
Output: 35 Watts

7184

Band: UHF
Channels: 8 Channel
Output: 35 Watts

7185

Band: UHF
Channels: 20 Channel
Output: 35 Watts

7186

Band: UHF
Channels: 99 Channel
Output: 35 Watts

7187

Band: UHF
Channels: 99 Channel
Output: 80 Watts

The following numbers replace the x as mentioned above:


1 = 2 Channel 25 watts (VHF) 15 watts (UHF)

2 = 8 Channel 25 watts (VHF) 15 watts (UHF)

3 = 2 Channel 40 watts (VHF) 35 watts (UHF)

4 = 8 Channel 40 watts (VHF) 35 watts (UHF)

5 = 20 Channel 40 watts (VHF) 35 watts (UHF)

6 = 99 Channel 40 watts (VHF) 35 watts (UHF)

7 = 99 Channel 100 watts (VHF) 80 watts (UHF)

If it had a -5 after the number it was a remote mount system

Radio Identification by Images

you can easily identify the band of the radio by looking at the inside. the UHF has two small cover plates the the VHF has on large one.


Power output of the radio can be determined by the size of the rear heatsink. the max power is also determined by the band (UHF/VHF)


Determining the number of Channels

(I'm missing an 8 channel image, but its easy, it only has one digit)