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Subject:
From:
Steve Dresser <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Fri, 17 Sep 2010 23:44:54 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (207 lines)
Yes, but you still want the tuner between the output of the amp and the 
antenna, not between the output of the radio and the input of the amplifier.

Steve

----- Original Message ----- 
From: "Butch Bussen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, September 17, 2010 22:53
Subject: Re: auto antenna tuner


> You're probably right, my amp input should be a good match.  No tuning
> on my amp though, that is why I'm looking at a tuner.  It is a magnus
> solid state amp, puts out around 600 watts or so.
> 73
> Butch Bussen
> wa0vjr
> open Node 3148
> Las Vegas
>
>
> On Fri, 17 Sep 2010,
> colin McDonald wrote:
>
>> isn't all that tuning of the amplifier partially responsible for tuning 
>> the
>> input as well?
>> seems to me that you shouldn't need to use any sort of tuner on the input 
>> of
>> the amp from the radio.
>> 73
>> Colin, V A6BKX
>> ----- Original Message -----
>> From: "Steve Dresser" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, September 17, 2010 6:23 PM
>> Subject: Re: auto antenna tuner
>>
>>
>>> Actually, you don't want to use the internal tuner when the amp is on. 
>>> If
>>> you did, you'd be attempting to match the input of your amplifier 
>>> instead
>>> of
>>> your antenna.
>>>
>>> Steve
>>>
>>> ----- Original Message -----
>>> From: "Butch Bussen" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Friday, September 17, 2010 12:43
>>> Subject: Re: auto antenna tuner
>>>
>>>
>>>> What I am wondering, if you have this interface, how do you also use 
>>>> the
>>>> tuner in the radio.  Maybe I wouldn't have to, but I'd want to use the
>>>> internal tuner when the amp is on.  Just wondering how you control 
>>>> both,
>>>> or am I making this to complicated?
>>>> 73
>>>> Butch Bussen
>>>> wa0vjr
>>>> open Node 3148
>>>> Las Vegas
>>>>
>>>>
>>>> On Fri, 17 Sep 2010, Steve Dresser
>>>> wrote:
>>>>
>>>>> John,
>>>>>
>>>>> Do they have an interface for the TS2000?
>>>>>
>>>>> Steve
>>>>>
>>>>> ----- Original Message -----
>>>>> From: "John Miller" <[log in to unmask]>
>>>>> To: <[log in to unmask]>
>>>>> Sent: Friday, September 17, 2010 11:40
>>>>> Subject: Re: auto antenna tuner
>>>>>
>>>>>
>>>>>> The LDG tuners you can get an interface for and have for a long time,
>>>>>> so
>>>>>> you
>>>>>> can hook it to the radio and use the tune button and it will drop the
>>>>>> power
>>>>>> and all.
>>>>>> ----- Original Message -----
>>>>>> From: "Steve Forst" <[log in to unmask]>
>>>>>> To: <[log in to unmask]>
>>>>>> Sent: Friday, September 17, 2010 11:10 AM
>>>>>> Subject: Re: auto antenna tuner
>>>>>>
>>>>>>
>>>>>>> Steve,
>>>>>>>
>>>>>>> Well I did take a deep breath before ordering.   While I have never
>>>>>>> had
>>>>>>> a lot of MFJ stuff, the stuff I've had over the years has all worked
>>>>>>> fine.   I know others haven't been so lucky, but I've had this one
>>>>>>> over
>>>>>>> 2 years with  no problems.
>>>>>>>
>>>>>>> I can't compare to the LDG since I've never owned one.   At the time
>>>>>>> of
>>>>>>> purchase I did compare the specs for both.   The LDG had 6 meter
>>>>>>> coverage, but I work very little 6M and no amp, so no big deal. 
>>>>>>> The
>>>>>>> MFJ offered higher power (1.5K vs. 1K)  as well as the ability to
>>>>>>> automatically lower rf drive and change to cw for tuning, while the
>>>>>>> LDG
>>>>>>> required you to do all that manually.   The MFJ also had the amp 
>>>>>>> relay
>>>>>>> connections.   Of course LDG may have  something out today with more
>>>>>>> features.
>>>>>>>
>>>>>>> Truth is, I've switched the MFJ and the Palstar manual tuner in  and
>>>>>>> out
>>>>>>> of the system a number of times over the past 2 years.   Each has 
>>>>>>> it's
>>>>>>> benefits.   I would have loved a Palstar auto tuner, but too rich 
>>>>>>> for
>>>>>>> me.    The Palstar auto had a motor driven roller inductor and 
>>>>>>> either
>>>>>>> 1
>>>>>>> or 2 moter driven caps.    It just went out of production, but a new
>>>>>>> one
>>>>>>> is coming soon, although I've not seen any specs on it.
>>>>>>>
>>>>>>> 73, Steve KW3A
>>>>>>>
>>>>>>> On 9/17/2010 10:25 AM, Steve Dresser wrote:
>>>>>>>> Steve,
>>>>>>>>
>>>>>>>> How do you think your MFJ auto-tuner stacks up against LDG's 
>>>>>>>> AT-1000?
>>>>>>>> I'm
>>>>>>>> sure the MFJ is cheaper, but based on things I've heard about other
>>>>>>>> MFJ
>>>>>>>> tuners, I wonder how reliable the internal components are.
>>>>>>>>
>>>>>>>> Steve
>>>>>>>>
>>>>>>>> ----- Original Message -----
>>>>>>>> From: "Steve Forst"<[log in to unmask]>
>>>>>>>> To:<[log in to unmask]>
>>>>>>>> Sent: Friday, September 17, 2010 10:05
>>>>>>>> Subject: Re: auto antenna tuner
>>>>>>>>
>>>>>>>>
>>>>>>>>> Butch,
>>>>>>>>>
>>>>>>>>> I have a MFJ-998 in the shack.  I'd give it a 4 out of 5 rating.
>>>>>>>>> It
>>>>>>>>> will handle 1500 watts, which is more then  my AL-80B or THP solid
>>>>>>>>> state
>>>>>>>>> amp will put out.  The problem I think you will find with  auto
>>>>>>>>> tuners
>>>>>>>>> including the ones built into the radio is limited matching range
>>>>>>>>> due
>>>>>>>>> to
>>>>>>>>> the fixed values of L and C. You won't be able to load your
>>>>>>>>> grandmother's walker on 40 meters.
>>>>>>>>> It has a ton of memories and up and down L and C buttons so you 
>>>>>>>>> can
>>>>>>>>> find
>>>>>>>>> a match manually if the auto function can't.   An optional 20$ 
>>>>>>>>> cable
>>>>>>>>> will interface to many rigs, and when connected this way hitting 
>>>>>>>>> the
>>>>>>>>> auto tune button on the rig bypasses the internal tuner, puts the
>>>>>>>>> rig
>>>>>>>>> into cw mode at low power for the tune  process, then returns to
>>>>>>>>> original mode and   power when tuning is complete.  If the amp 
>>>>>>>>> relay
>>>>>>>>> jacks on the tuner are connected between the amp and radio,  the 
>>>>>>>>> amp
>>>>>>>>> will be bypassed during tune up.   This relay is also supposed to
>>>>>>>>> prevent the amp from keying in the event of a high swr, but I 
>>>>>>>>> can't
>>>>>>>>> say
>>>>>>>>> that I've really  tested this function fully.
>>>>>>>>>
>>>>>>>>> There are some menus for which sighted help would be needed, but
>>>>>>>>> they
>>>>>>>>> are the set it and forget it type of stuff.   Things like swr 
>>>>>>>>> point
>>>>>>>>> at
>>>>>>>>> which it should  start looking for a better match, and swr point 
>>>>>>>>> for
>>>>>>>>> the
>>>>>>>>> amp relay to bypass the amp.
>>>>>>>>>
>>>>>>>>> 73, Steve KW3A
>>>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>
>>
> 

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