[1000mp] Mark V high SWR with amp

[Bob Main]

Why?  Any idea?  (Just wondering, especially since they are probably side by 
side.)

Bob
KB4CL

----- Original Message ----- 
From: "Larry Dajnowski" <Larry at amiloan.gccoxmail.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Sunday, February 06, 2005 12:02 PM
Subject: Re: [1000mp] Mark V high SWR with amp


>I have owned a Alpha 99 and now
> an Alpha 87a; Alpha does recommend
> using a 6 foot length of 50 ohm coax
> between the rig and input to the Amp.
>
> Just a suggestion.
>
> 73, Larry AJ2W
>
>  ----- Original Message ----- 
>  From: Michael W Elliott
>  To: All about Yaesu 1000mp
>  Sent: Sunday, February 06, 2005 10:41 AM
>  Subject: Re: [1000mp] Mark V high SWR with amp
>
>
>  Well let me replay the descriptiomn.
>
>  The amps are Alpha 99 and Alpha 89.
>
>  These are modern amps.
>
>  Next:
>
>  The swr on the out meters of a Bird and Nye Viking Tuner show output swr 
> fine.
>
>  Swr on amplifier says ok
>
>  SWR when running barefoot no problem on the rig.
>  Once I switch on the amp the problem occurs.  Seems like there is a 
> mismatch back to the input side althought the output side says everything 
> is ok.
>
>  I will call Yaesu on Monday and describe the situation.
>
>  Only other thing  I can think of is NKE Viking tuner being in line. 
> Gonna take it out of line and run and see what happens.  Would sound 
> strange if the tuner but could be possible.
>
>  Mike
>
>  Gene Davies AA6NP <aa6np at mind.net> wrote:
>  It sounds like you are saying that your set-up WAS
>  working fine, but now you have a high swr when
>  running with your amp. Try inserting an swr meter
>  between the two to verify the reading on your MK5.
>  If the reading is high, there is a problem with
>  the amp. It could be a problem with the amp's
>  input circuit (tuned or broadband), this is not
>  likely though.. It could also be a bad tube in the
>  amp. Also check the transmit/rcv relay in the amp.
>
>  73,
>  Gene
>
>
>
>  ----- Original Message -----
>  From:
>  To: <1000mp at mailman.qth.net>
>  Sent: Sunday, February 06, 2005 7:37 AM
>  Subject: Re: [1000mp] Mark V high SWR with amp
>
>
>  > In a message dated 2/5/2005 7:33:35 PM Central
>  Standard Time,
>  > kq0b at sbcglobal.net writes:
>  > I have started to notice a high swr reading on
>  the
>  > input side (transceiver) while running with amp.
>  > Hello,
>  >
>  > Your problem is due to the fact that your
>  amplifier does not have a tuned
>  > input circuit. A modern amplifier that is
>  designed to work with modern solid
>  > state trasnceivers has a tuned input circuit for
>  each band the amplifier
>  > functions on.
>  >
>  > You can simply use the internal antenna tuner to
>  match the radio to the
>  > amplifier, you may need to retune the amplifier
>  slightly after you auto tune the
>  > radio.
>  >
>  > Enjoy and 73
>  > Douglas
>  >
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>  >
>
>
>
>
>
>
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>
>  Michael W. Elliott
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