[AMRadio] ART13 help

[Hirokik]

Hello,




I have been restoring an ART13 and here is my current situation. I'd appreciate any suggestions or advice you may have.


On Voice and MCW I can get very good output and the 200w incandescent bulb dummy load glows nice and bright. All the voltages on the plate and grid of the 813, 811s, 1625s and 837 are at the correct values.


Here are remaining issues:


1. On CW, there is no output whatsoever, even though the vacuum relay clicks when I key. The VFO is not producing any signal on any frequency. No difference whether I am in Calibrate, Tune or Operate position. It feels as though a previous owner somehow had disabled the CW function altogether.


2. On Voice, the  PTT switch works, but as I speak into the microphone (a T17 carbon mike) the dummy load bulb's brightness doesn't change; it doesn't glow brighter as one would expect. Do you think the carbon inside has become solidified and  dysfunctional? If so, any good remedy?


I can try a dynamic mike from my modern HF gear (I will first switch to the Dynamic position behind the frequency panel of the ART13.) I assume there is enough amplification to accommodate a modern dynamic mike.


3. What would be the simplest, minimum workable long wire antenna for 80 and 40 meters? I can run a 20 to 90 feet long wire 20 feet above ground.   Do I need a counterpoise? I do not have a good grounding system. Or, alternatively, I can erect a commercial vertical designed to accept a 50 ohm output. 


I only have a G5RV Jr.,(designed for 40-10 meter for use with modern HF rigs.)  Do you think I can "force feed" this antenna for 80 and 40? If so, should I insert some additional capacitance between the Antenna and Ground connections on the ART13?  


Thanks for your help. 


73,


Hiroki  AH6CY