[TenTec] Orion II Low Output on 12 and 15 m

Kim Elmore cw_de_n5op at sbcglobal.net
Fri Jun 28 23:16:47 EDT 2013

I have an Orion II  and have noticed over time that its output on the 15 
and 12 m bands is lower than all the other bands on LCW, UCW and FSK. 
With the PWR set to 100, the 160 through 20 m bands all show about 105 W 
output using a 13.8 VDC power supply and a known accurate B&W 334A dummy 
load. This output is stable regardless of whether the internal tuner is 
used. Output on the 10 m band is 90 W, but on the 15 and 12 m bands, 
output is about 70 W. also, the ALC indicator is NOT lit at the full 
power output setting on either the 15 or 12 m bands, but IS lit on all 
other bands. The ALC indicator will light on the 15 m band when the PWR 
setting is adjusted down to 76 or below and when adjusted down to 84 or 
below on the 12 m band. Any adjustment above this level results in the 
ALC light being extinguished. On the 12 and 15 m bands any power output 
is not affected until the PWR setting is at or below these levels. The 
power indicator meter on the Orion II unit itself indicates about 95 on 
all bands except 15 and 12 m. On 15 m it indicates 82 and on 12 m it 
indicates about 88.

I had mentioned this earlier and had tried adjusting the internal ALC 
level. This didn't affect the 12 or 15 m bands but did affect the 
others. I exercised all of the plugs internal to the radio, but it made 
no difference. Has anyone else experienced this? If so, what's the fix?

Kim N5OP

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