[Elecraft] Internal Antenna Tuner and SPE Expert Amplifier Questions

[Fred Smith]

Hi Bill

No the internal tuner won't help with the amp in line but still one of the
very best internal tuners there are.

I have 3 different HF amps I use one is the KPA500 HF/6m with the KAT500
tuner very good auto tuner up to about 600w 6-160m.

My second amp is an Alpha 9500 HF with auto tuner at <3:1. I still have my
Alpha 87A HF and used 2 tuners with it the first was a Palstar AT4K manual
tuner sold it (that was a mistake) and now looking for a backup tuner a used
Palstar AT5K.

My current legal limit + tuner is a Palstar HF-AUTO the new style, much
better than the old style one I had and got rid of and now sold elsewhere. I
have been using it now for 18 mo or so with no problems and quite a few
firmware releases to improve it even more. The nice part about it is that it
can be used with any amp only an RF connection, Auto or Manual tuning you
can choose.


73,
Fred/N0AZZ
K3 Ser # 6730--KX3 # 5210--K2/100 # 6470-KAT100
P3/SVGA--KAT500--W2
Amps Elecraft KPA500 HF/6m--Alpha's 9500 HF--87A HF--Mirage B-5030-G
300+w--(2) B-5016-G's 165w 2m



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of bill conkling
Sent: Monday, December 09, 2013 7:51 AM
To: pastormg2 at verizon.net
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Internal Antenna Tuner and SPE Expert Amplifier
Questions

With an outboard amp attached you should BYPASS the internal ATU as it is
looking through the amp and therefore can't help match the ant to the amp.

...bill nr4c

Sent from my Verizon Wireless 4G LTE DROID

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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