[Elecraft] Internal Antenna Tuner and SPE Expert Amplifier Questions

[Keith Heimbold]

Mark,

I should have written to be clear a big dip higher in the 40m band so a high swr on the band edge low in 40m band. Sorry it is still early out here on west coast.

Good luck!

Keith
AK6ZZ

Sent from my iPhone please excuse typos

> On Dec 9, 2013, at 6:40 AM, "Keith Heimbold" <ag6az at hotmail.com> wrote:
> 
> Mark,
> 
> I own a SPE 1K and I would not use the internal tuner to tune any antenna above 2.5:1 with it unless you back down on power output significantly. I have found that once you raise output power above 500-600W with the SPE 1K it sometimes goes into protection mode with poorer matching antennas that have higher SWR. I found this with my S33 Mosley on 40m which had a big dip on the lower end of 40m before I retuned the antenna by extending it for the lower band setting.
> 
> There are also issues with warranty for using an external turner with the SPE 1K that you should look into.
> 
> Overall my opinion is that it is a really excellent amplifier but so far only have owner ten months. It is great for remote operations if you are going that route. 
> 
> Good luck!
> 
> Keith
> AK6ZZ
> 
> Sent from my iPhone please excuse typos
> 
>> On Dec 9, 2013, at 5:19 AM, pastormg2 at verizon.net wrote:
>> 
>> Good Morning,
>> It's Mark Griffin KB3Z. I was looking at an SPE Expert amplifier and I see it has an internal antenna tuner which can handle SWR's of up to 4:0. But, I was wondering if I connected the output of my K3 to the input of the amplifier and then the antenna to the output of the amplifier, If I used the K3 internal antenna tuner to decrease the SWR to a reasonable level would this work? I don't currently have the internal antenna tuner in the K3. It is perhaps a bad question to ask, but I am currently using a Palstar AT2K as my antenna tuner. Any help or advice would be greatly appreciated.  Mark Griffin, KB3Z
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