Owen Duffy wrote:
Now, you're trying to trick me... did you mean Wireman 554?

Yep, no trick, just tricky fingers, getting worse with age.

The 0.9dB stated earlier was (as stated) for 552 which had a Zo closer
to your 380 ohms, whereas 554 is 360 ohms.

I measured the 554 at 380 ohms. I could have been off by 5%.

Given that some radios (including the IC706-IIG) reduce drive power at
high VSWR as a protection mechanism, you may want to install an ATU to
develop full power output. My recollection is that the power output of
the IC706-IIG is significantly down at VSWR=2, but it probably also
depends on the actual load impedance.

I have never witnessed my IC-706 folding back at any resistive
load between 25 ohms and 100 ohms. My IC-706 manual says, "When
the SWR is *higher* than approx. 2.0:1, the transceiver's power
drops to protect the final transistors."
--
73, Cecil http://www.qsl.net/w5dxp