[MRCA] ART-13 Tuning

[Christopher Bowne]

I use a probable 750 pf variable
across the output from my ART-13 transmitter, it definitely has an affect when loading into a low (50-75 ohm) impedance non reactive antenna or dummy load.  Can get at least 100 watts out and normal SWR indications using a Heath HM-102 wattmeter/SWR meter.  4000
pf fixed shunt on output seems excessive. 

Chris, AJ1G Stonington CT.

Sent from my iPhone

> On Mar 13, 2023, at 15:29, Mack McCormick <w4ax.mack at gmail.com> wrote:
> 
> Jeep,
> 
> Thank you very much for responding. I will give your settings a try and report back. My voltages from the power supply are almost identical to yours.
> 
> Mack
> W4AX
> 
>> On Mon, Mar 13, 2023 at 15:09 Jeep Platt <jeepcomms at outlook.com> wrote:
>> I use a setting of 8 for 75 meters. The loading control (to the left side) has no genuine effect. I also use about 850pf of external loading. At 1250v B+, I read 120 watts into 50 ohms.  Other p.s. voltages are 400v and 27.5v.
>>  Jeep K3HVG
>> 
>> Sent from my Verizon, Samsung Galaxy smartphone
>> Get Outlook for Android
>> ______________________________________________________________
>> MRCA mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/mrca
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:MRCA at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> -- 
> 73,
> 
> Mack
> W4AX
> https://www.qrz.com/db/w4ax
> ______________________________________________________________
> MRCA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrca
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCA at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/mrca/attachments/20230313/8cc81a5f/attachment.html>