[Yaesu] Mark V w/Linear Amp Problems

James C. Hall, MD nwtcc at earthlink.net
Sun Dec 28 17:52:26 EST 2003

Hi Javier:

I see this all the time with my Mark V to a Alpha 87A to Ten-Tec tuner 
and out to the antenna via Array Solutions RatPak antenna switch.  The 
only thing I can figure is that there is some reactance in between the 
amp and the Mark V that is not tuned out.  Now, I don't use the tuner 
in the Mark V to tune this out - Alpha advises against using any tuner 
in front of it - but, boy, am I tempted !

73, Jamie

On Dec 28, 2003, at 5:31 PM, jlopez at plasticosomega.com wrote:

> Hi,
> I just had been using my new Mark V for few hours and I found the 
> behavior shown below, wich I dont know if its normal.
> The rig is feeding a Ten-Tec Centurion Amp after wich there is a 
> Ten-Tec antenna tuner between the amp and the antenna.
> My antenna has 1.4 swr so the tuner is bypassed and with the amp in 
> standby mode there is no problem but if I operate the amp the swr 
> shown at the Mark V goes to 3 or 4 but the swr meter at the antenna 
> tuner in by-pass mode shows 1.4.
> What could be happening???
> Advice welcome,
> 73's de Javier
> yv5mbx
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