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Cr1000 repeater power amp

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Solfan

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Mar 27, 2023
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Hello, I have a 75watt PA from an EFJohnson CR1000 repeater. I'm trying to find if there is any documentation about the amp. Trying to verify the driver power, I have it at 7watt but can't get it to output 75watt. Also was curious what the 2 red and black connections are for. Any help would be great.
 
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Solfan

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I was told to use 7w drive to get the 75w out. I have only been able to get about 63w out. I was thinking of raising the drive but didn't want to oveoad it. Can't find any documentation for the amp. Even the documentation for the cr1000 does not have any info that I could find, unless I missed it. I will have to look at the manual again.
 
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kf8yk

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May 3, 2003
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Section 4, page 22 states the maximum exciter output is 18 watts, Section 3, page 6 state a nominal drive of 10 watts is required by the PA.

The CR1000 uses a power control circuit to adjust exciter drive, I would start at 10 W and adjust up or down as necessary.
 
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Solfan

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Mar 27, 2023
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Ahh. Ok. I'm not using the amp in the cr1000, its acctually connected to an xpr8300. so I will change my drive to 10w and re-adjust the power. Thank you for the information.
 
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