It is their top of the line auto tulner, mmentioned in a previous 
message.  WLillhandle up to 1500 watts, tunes a wire antenna or two coax 
feed antennas.
73
Butch
WA0VJR
Node 3148
Wallace, ks.


On Sat, 13 Apr 2013, Don Risavy, Jr.; NR4DR wrote:

> What is this?
>
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Butch Bussen
> Sent: Saturday, April 13, 2013 6:02 PM
> To: [log in to unmask]
> Subject: Re: Amplifier for H.F
>
> I have a m f j 998 I'm probably going to sell.  I sent it back to m f j and
> it is still in the box after bgetting it back.  I'm not sure what a fair
> price would be.  Any interest?  I'll do some looking around.
> 73
> Butch
> WA0VJR
> Node 3148
> Wallace, ks.
>
>
> On Sat,
> 13 Apr 2013, Kelvin Marsh wrote:
>
>> Hi Don,
>>
>> Thought I'd bring this back to the list, as others might benefit and
>> contribute <smile>.  I think your idea of having between 500W and 1KW
>> is good.
>>
>> There are several solid state amps with auto tuners built in, but I'm
>> not sure what aural feedback they would give you.  Personally, I use
>> the MFJ 998 auto ATU, and I'm very impressed with it.  It can handle
>> 1.5KW, and has aural tones to let you know the approximate match, and
>> beeps will guide you through using the memory banks.  The menu is not
>> accessible, but since the initial setup, I've never needed to use it.
>> One nice feature is that while tuning it opens the PTT line.  If your
>> antenna goes bad during transmission, the AATU will start hunting and
>> the amp will be disconnected!  The only problem is the cost...
>>
>> I use all Icom gear, and the PW1 amp automatically changes band, using
>> CIV data from the radio.  I understand that several amps can do this,
>> like the Yaesu Quadra, and the Expert 1, but the latter may need a PC
>> to manage the band changes.
>>
>> From what I've seen, the Ameritron amps, like the ASL-600, look to be
>> very good value, and I guess the lack of an internal tuner is an
>> advantage, on the basis that there's no point paying for something you
>> might not use <smile>.
>>
>> ***
>> Hi Don,
>>
>> Your amplifier query is interesting, and a question  a lot of blind
>> ops are asking at the moment!  I guess you could help by saying what
>> power output you want, your budget, if you will already have a power
>> supply, which bands it should cover, and the type of antenna you have.
>> It would also be useful to know if you have an accessible power meter,
>> a QRO ATU and whether you want auto band changing.
>>
>> As Bob has said, although there is no need to manually juggle the
>> tuning controls with a solid state amp, it needs either a resonant
>> antenna or a capable ATU.
>>
>> Although the protection circuits should prevent any amp damage, a
>> mismatch is likely to either trip the amp or cause it to sharply fold back
> the power.
>>
>> I use a fully automatic 1KW solid state amp with internal auto ATU
>> here, but I did not get enough aural feedback for my satisfaction
>> <smile>.  I prefer to use an external auto ATU that I can use with
>> confidence, and hear exactly what is going on.  Especially useful at
>> RF power that can cause serious injury or expensive damage!
>>
>> Best wishes, Kelvin Marsh - M0AID
>>
>> Working to improve accessibility for radio amateurs with disabilities
>>
>> www.active-elements.org
>>
>> For accessibility evaluations of amateur equipment and MP3 manuals
>>
>>
>> -----Original Message-----
>> From: For blind ham radio operators
>> [mailto:[log in to unmask]]
>> On Behalf Of Don Risavy, Jr.; NR4DR
>> Sent: 12 April 2013 23:55
>> To: [log in to unmask]
>> Subject: Amplifier for H.F
>>
>> Wondered does anyone happen to have a good recommendation on a amp for
>> h.f that's solid state and no tuning involved?
>>
>>               Thanks.
>>
>> Cul 73 nr4dr
>>
>>
>>
>>
>>
>>
>>
>>
>>
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>>
>>
>>
>>
>> -----
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>> Checked by AVG - www.avg.com
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>
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