Chris,
I would think the input levels of whatever instrumentation you will
connect to the coupler as well as the power levels that you will have at
the input will dictate whether you build it for -20 dB or -30 dB.
I have both and use them on the test bench with a Tandem Match power/SWR
meter.
I have a CP1 dual directional coupler kit.
Debating whether to make it -20dB or -30dB.
If I were to make it for -20dB, could I then add Elecraft step attenuator
to extend the range without causing problems at higher wattage (like core
saturation with the 20dB toroids).
Thanks for any help.
Chris
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