[MRCA] ART-13 Power Output Poll

[D. Platt]

I currently run two ART-13s, one an ATC, the other a T-47A.  Both units 
are powered by a.c. supplies with 1100v and 400v, with 27 volts on the 
filaments.  With approx. 700pf on the output, I get a consistant 100-120 
watts output on a Bird thruline into a 50 ohm dummy load.  Into my 
resonant dipole, the identical numbers occur. One antenna current meter 
shows about 1.9A of current, the other a bit less.  This just about 
coincides with 100/120 watts/50 ohms, resistive.  In each of these 
cases, the VSWR is less that 1.2:1.  I use a 12.6 ohm plate meter shunt 
and the ART-13 plate meters peak up to just about full scale on voice 
peaks.  The power supply meters, however, indicate the correct current 
that being approx. 180ma. key down and 320ma plate current plus 
modulator.  As with others, I think perhaps your readings are a bit on 
the high side, especially if the dynamotor is being used.

Jeep - K3HVG