[Amps] TL922A and AL80A

[rlm]

>> I run AM quite frequently (Rich mentioned RTTY) and tune the amp with
>> ~100W drive, then back the drive down until the amp is running at about
>> 500W DC input (always in CW mode, BTW).  Seems to work quite well.
>> That's why I'm interested this...
>
>AM requires the amp run 1/4 or less of the peak output that you load the amp
>for.
>The amp would have perhaps 25% efficiency under carrier conditions.
>
>At 500w input that's maybe 125w or so out, you could measure the exact
>amount. That's about  375 watts dissipation, and 500W PEP output with normal
>AM. 

My TL-922 produces c. 1400w-pep in either AM or SSB.  In AM, the carrier 
level is c. 350w, and the indicated anode/plate current with or without 
modulation is 400mA.  Tuneup for both involves sending 50wpm dits on CW, 
and tuning for max RF out.  For AM, the carrier is either set for no 
change in anode current during modulation, or 25% of pep out.  Mic gain 
is adjusted for minimal ALC indication.

>...

-  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
www.vcnet.com/measures.  
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