Thanks to all of you who replied to my initial message. I think I'd part convinced myself that I would prefer the KAT500 and your various comments have reinforced those thoughts.

The KAT500 User Manual mentions use of the AH-4 protocol, which is what the IC7100 uses. It also mentions use of 7 Watts, so I would hope that the IC7100 would work OK as it outputs 10W in tune mode.

It's more important to me that the K3 and KPA500 interfaces with the KAT500, the Icom interface would be a secondary useful bonus.

73,

Alan. G4GNX

-----Original Message----- From: Vic Rosenthal
Sent: Wednesday, August 05, 2015 9:00 AM
To: G4GNX
Cc: Elecraft Reflector
Subject: Re: [Elecraft] KAT500 tuner

It would be interesting to compare the toroids and capacitors in both products. My guess is that they would be similar, and the difference in ratings is based on the degree to which the manufacturer wishes to be conservative. As I've said on numerous occasions, MFJ products are rated in MFJ watts, which are half the size of regular watts (Pmfj = 2EI).

Vic 4X6GP/K2VCO

On Aug 5, 2015, at 4:47 AM, G4GNX <g4...@theatreorgans.co.uk> wrote:

Hi all.

I am contemplating purchasing a KPA500 amplifier to complement my K3.

I currently have a MFJ 998 tuner which is good for 1.5KW but I think that the KAT500 tuner from Elecraft will be a superior product. Would this be a sensible assumption?

If I also buy the KAT500, will it easily interface with my Icom IC700 and is there a specific setting that would allow me to use the IC7100 “Tune” button, which allows tuning at reduced power (ISTR it’s set at 10watts)?

73,

Alan. G4GNX

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