[Elecraft] Use of K3 Antenna Tuner to match amplifier input

Lance Collister, W7GJ w7gj at q.com
Thu Sep 17 16:20:42 EDT 2009


Guy Olinger K2AV wrote:
> Your amplifier should be close enough to a 50 ohm drive impedance that the
> bypass mode in the K3 is easily usable when driving the amp. If you need an
> ATU to drive the amp, it is a problem of some sort with the amp tube, its
> input circuitry or connecting circuitry.  I have seen a bad 3 foot piece of
> coax between a transceiver and amp make the amp appear undrivable.
> 
> What is the indicated SWR on the K3 display when driving the amp? If it's
> not 1.5 or less, got work to do on the amp.
> 
> 73, Guy.
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> 
The SWR is 3:1 according to the SWR meter on the K3.  The amp is a solid state TE 
SYSTEMS amp with an untuned input, which is why I want to try to use the K3 antenna 
tuner to match into it.  TNX for your suggestions.  VY 73, Lance

-- 
Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX)
P.O. Box 73
Frenchtown, MT  59834  USA
QTH: DN27UB
TEL: (406) 626-5728
URL: http://www.bigskyspaces.com/w7gj
2m DXCC #11/6m DXCC #815

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