Hi to all,
Iam working with an SB221 amp, cantget the power output to go higher than
400watts either AM or SSB voice peak. The tube is confirm good from a
working amp.
Here is my reading
*20m, AM mode ( no modulation )
*Plate current = 680mA
Grid current = 180mA
HV= 2750V SSB
Drive = 90~100watts
Output = 450watts
*40m, AM mode ( No Modulation )
*
Plate current = 580mA
Grid current = 160mA
HV= 2750V SSB
Drive = 90 ~ 100watts
Output = 400watts
Hope to find some info what and where to troubleshootc for this problem.
Thank you,
Alex
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