On 07/27/2010 04:45 PM, Antonio Vernucci wrote:
Should you be interested to know it, I finally found a very good match
on 80 meters putting an external 2000pF capacitor in parallel to the
antenna. Switch position is no. 6.

Tnx Paul W2EC for hint.

73

Tony I0JX


"Antonio Vernucci" ha scritto nel messaggio
...
Kenneth & Thierry

thanks for your answers.

I have found many articles on the web (including the Surplus
Conversion Manuals), but nowhere I found a clear statement that the
ART-13 cannot work on 80 meters with a 50-ohm antenna (and that a
modification is therefore necessary).

At present, my main concern is to ascertain whether my particular
ART-13 has got a problem (I hate to have radios that are not perfectly
functional), or instead all ART-13s do not work on 80 meters - by
their design - with a 50-ohm antenna.

In the second case, I will just give it up and use - on 80 meters -
one of the many other AM radios I have.

Same conclusion for 10 meters (I have seen that complex modification,
but it may perhaps be worthwhile for those having just a single radio).

73

Tony I0JX

"Thierry_S" ha scritto nel messaggio
r...
Le 26/07/2010 00:27, Kenneth Scharf a écrit :
...
Check on the ARRL website and search the QST back issue index for
articles from the late 40's through early '60s and you should find some
articles on the ART13.

Hi folks, Antonio,

you can download the three volumes of the Surplus Conversion Manuals
he

http://www.mines.uidaho.edu/~glowbugs/SurpConv.html


Hope this helps,


Thierry



NTITOI it was very common to need a series or shunt capacitor in the
antenna feed with these old rigs on the lower bands. Same for the ARC5
transmitters too.