[Elecraft] K3S Semi firm plan

[Guy Olinger K2AV]

The power reduction you see is sometimes called folding and is done to
protect the final transistors. An assessment of the antennas you have or
contemplate with their SWR curves, and whether you will be operating
barefoot or not should tell you whether tuning will be required.

Some will want to handle the tuning chores with a high power tuner that
will also do this for a transistor external amp.

For example a K3, KPA500 and KAT500 would not need the tuner in the K3.

If you expect to use your K3 at a field day, get the KAT3.

If you get it and never use it you can sell it in a heartbeat here on the
reflector.

Another of those very individual decisions.

73, Guy K2AV

On Tuesday, August 25, 2015, Bob McGraw - K4TAX <rmcgraw at blomand.net> wrote:

> I've noticed with my K3S when operating with a SWR of greater than 2.5 : 1
> the power output does take a dive downward.   While I use an external
> tuner, it would make sense to have and use the internal ATU in certain
> applications.
>
> While resonant antennas are best, I operate 160M and 80M and due to the
> bandwidth, some means getting SWR to reasonable value across the band sure
> seems reasonable.  I find the internal tuner does and excellent job
> resolving a match with these bands.
>
> 73
> Bob, K4TAX
> K3S s/n 10,163
>
> On 8/25/2015 9:31 AM, ae4pb at carolinaheli.com wrote:
>
>> Ok, based on current funds the purchase at Shelby will most likely be as
>> listed unless there are further discounts. I've asked and they don't
>> offer a
>> veteran or masonic discount.
>>
>> Purchase/Order:
>> K3S/100-K  100 W Transceiver, Kit
>> KRX3A-K  High Performance Subreceiver for the K3S and K3 Kits
>>
>> * Already purchased a 400hz filter from a reflector participant.
>> Other - Dust covers from Rose for Rig and Bencher Key.
>>
>> Future:
>> Another 400hz filter
>> Pair of 200 or 250hz filters* I want to operate the rig for a while to see
>> what I actually want/need.
>> KAT3A-K  Internal ATU with 2nd Ant. Jack for the K3S and K3 kits  ** not
>> really sure I need this as I only plan to use resonant antenna's, we'll
>> see
>> how sensitive the rig is. I've been told it will back off on power as SWR
>> rises.
>> P3-K Panadapter Kit for the K3S, K3 and other rigs ** for the time being
>> I'll use an SDR to view the band
>> Misc filters over time as needed.
>>
>> LOL, I'll be broke for a while but on the air.
>>
>> Jerry Moore
>> AE4PB, K3S SN# TBA
>>
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>
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