[ARC5] Ant. Tuning Series Caps - Trials and Surprises

[J Mcvey]

Yes 100 pf CRC ( AMERICAN) Barrel tx capin series works fine for me too on 80 meters,I use the vacuum cap in the BC-441 in series for 40 metersBoth are connected through the bc441 to 4:1 balun to 
bring the impedance within the upper range of 10-12 ohms of the Tx units.The rollers on both units are at about 40 to 50%.I get a little over 50w CW on both running with the BC456's dynamotor @ 25V.
 

    On Sunday, August 6, 2017 7:29 PM, Dennis DuVall <duvallddennis at gmail.com> wrote:
 

 As I’ve mentioned before, connecting the series cap from the antenna post to ground forms an “L” network that works FB for loading into an end-fed half wave wire antenna.Voltage rating of the cap more of a consideration here than in the series connection but have found the gray, cylindrical Russian caps to work FB in this configuration as well.
Dennis DuVall, W7QHOGlendale,CA




On Aug 6, 2017, at 11:31 AM, David Stinson <arc5 at ix.netcom.com> wrote:
As most of you know, I put a fixed capacitor between the ANT postand the center-conductor of the coax leading to a 50-Ohm loadwhen matching WWII Aircraft rigs to “ham” antennas.I’ve recommended Hi-Voltage caps and, I confess, have doneso because it seemed intuitively “right” to do so.I always meant to do some tests.  Finally did, and I’m very surprised at the results.  

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