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Re: Low output on CW UBITX

 

Just check C81 and R83 if they are OK.

Also L1,2,3 & 4.

At 22/12/2018, you wrote:
Did some more tests, built an RF probe for my DMM, did the maths to come up with the following outputs in watts at about 13volts.


3.5 7 10 14 18 21 24 28
CW 0.9 0.6 2.8 2.2 1.3 2.6 1.0 0.6
SSB 3.6 3.9 2.6 2.4 3.5 1.8 1.1 1.0

As you can see, on some bands output is lower on CW than SSB and other bands it is the other way around.? I checked the inductors in the PA output LPFs and the windings looked about right (I didn't pull out the caps to check values).

So I remains with the problem why the radically different outputs between SSB and CW, that's aside from all the outputs being low.

Any further input valued - thanks team.

Cheers,

Rod
VK1ACE
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