[Elecraft] KAT500 Tuning issue

[Fred Jensen]

On 12/8/2012 2:49 PM, Mark Bayern wrote:

> The feedline between the antenna and the tuner will know
> otherwise and can have points of very high voltage that could cause
> insulation breakdown, and points of very high current that can cause
> overheating and will be a source of power loss. This isn't really a
> problem in QRP operations, but when you head into the QRO world it can
> make a difference.

Well, yes but "loss is loss."  If your transmission line exhibits 3dB 
loss on 20m, it will turn your 500W into 250W at the antenna, and it 
will turn your 5W into 2.5W at the antenna.  I think you might have been 
referring to damage from excessive voltage/current which *is* a problem 
QRO and not QRP, but the loss doesn't change.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org