[MRCA] ART-13 Power Output Poll

[Meir WF2U]

I can't say anything about the ART-13 power on the higher bands, because I
only use it on 75/80 meters on several net frequencies.

With a fixed 2000pf  fixed cap in parallel with the output, it tunes up
around to the normal cathode current range as marked on the meter on the
front panel, the power output into 50 ohms is between 95 to 120 W depending
on frequency.

My ART-13B is powered with the DY-17 dynamotor, which is fed with 28.0 V
from a PP-1104-C power supply. The PP-1104 has no current limiter and
handles the dynamotor surge current.

I'm sure I could get more optimized match and thus more power output at the
rated cathode current if I used a variable capacitor instead the fixed one
at the ART-13 output.

Another ART-13 I have (no suffix letter) gives me similar results.

 

Chris, those numbers seem a bit high - unless your cathode current is way
above the indicated area on the meter. !00 W output is not specified in the
manual when loaded into the "standard" aircraft antenna. I'll go to the
radio room and look into the manual, will email the data from there.

 

73, Meir WF2U

Landrum, SC

 

  _____  

From: mrca-bounces at mailman.qth.net [mailto:mrca-bounces at mailman.qth.net] On
Behalf Of Christopher Bowne
Sent: Sunday, February 02, 2014 11:29 AM
To: mrca at mailman.qth.net
Subject: [MRCA] ART-13 Power Output Poll

 

Just wondering what folks are getting for actual output power from their
ART-13s.  Mine has consistently shown in the vicinity of 175 watts carrier
output on my Heath HF watt meter, even into a Bird 500 watt dummy load (no
watt meter indication on the Bird itself).  I have always thought this to be
a bit on the high side of reality for a set powered by a DY-17A.  I get
similar results with my T-195.

 

I know the nominal rating for the ART-13 is 100 watts out, but I think that
was for loading into a low impedance aircraft antenna, should be able to get
more from a 50 ohm dipole load.  I use a large high capacity variable cap
across the TX output to allow for better control of the loading, the watt
meter is downstream of this on the feed line to the antenna or dummy load.

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