Terry
you do not mention the lenght of your inverted L. However if it is end fed
then it is unlikely to be exact 50 ohm. Then the length of coax gets
important because it may do an impedance transformation.
What is happening is that your tuner works in a high impedance load and that
means high
When you switch from CW to SSB are you also changing frequencies from
the CW subband to the SSB subband? If so, repeat your test on the same
frequency.
My simple world view makes this one easy to solve. Stay on CW :-)
- Keith N1AS -
- K3 711 -
From: [EMAIL
Terry,
As another responder indicated, you have a high impedance at the
feedline/ATU junction - a high impedance translated into a higher
voltage for any given amount of RF, and when that voltage is high
enough, the tuner capacitors will arc. When they arc over, the
capacitance changes
Define 275W. Is that PEP or is that average. If it is what the meter reads
the SSB peaks might be much higher. I assume you actually knew this.
Another possibility is the K3 power spike on first SSB syllable, that might
be higher than the one on CW. Whenever you change mode or power setting, the
Are you running your K3 tuner into the amp? If so, shouldn't' the amp be
giving the radio a nice match to start with? Are you running a tuner after
the amp as well? If you are running the K3 tuner, turn it off.
Is this on the exact same frequency or are you switching between the cw and
ssb
Don
Spot on! Thank you and also to Mike, W0MUshould have picked this up
myself. Haven't done any operating over the last few weeks but I have been
tidying up the antennas around the garden. Whilst doing this I thought that
I would improve my 80m antenna by firstly spreading the radials out a
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