[MRCA] grc109 into coax fed 1/4 wave 40m vertical

[Christopher Bowne]

Perhaps add some shunt resistance in parallel with the bulb to limit its current?  The feed point impedance of the antenna is likely to be in the
vicinity of 35 ohms. 

73 de Chris AJ1G
Stonington CT

Sent from my iPhone

> On Feb 25, 2025, at 08:32, comcast via MRCA <mrca at mailman.qth.net> wrote:
> 
> folks. finally fired up the grc109 from Joe Munson’s estate. It appeared to load up good on 40 m  however the #47 output bulb (LO Z indicator) was real bright and eventually burned out.  the neon bulb worked as it should.  I had the power supply on the 130v tap. does this seem normal?   I was not using the end fed wire setup as shown in the manual.   do I need a different method of matching the 109 output when using it on coax fed antennas so the 47 bulb doesn’t burn out again ?
> 
> Jeff N2IA
> Sent from my iPhone
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