Maurice's message went straight to me instead of the mailing list, because I
have my reply-to field set up.
Lloyd Rasmussen, Kensington, Maryland
-----Original Message-----
From: Maurice Mines [mailto:[log in to unmask]]
Sent: Tuesday, November 30, 2010 11:38 AM
To: [log in to unmask]
Subject: Re: Looking for a blind friendly antenna tuner?
Dear list, here is hopefully a better explanation of my situation. I am a
college student, and so thus I live in a dorm like apartment complex. As I
stated earlier I owned the Kenwood 480 SAT. Many of the local hams here in
the Greeley area, believe that the tuna in the 480 is not up to the task of
tuning what material to have for an antenna. So the question boils down to
this, do I need, and what should I obtain, an external antenna tuner. From
everything that I have read on this list so far I don't see a compelling
case to remotely consider this. What I think I just need to do, is keep
trying different antenna setups until I find the one that works for me, and
my specific situation. One of the very large caveats to this entire
discussion were me anyway it is the fact that whatever antenna setup I come
up with, it either must be very well hidden, or be inside. Neither of these
situations works well for HF operation. I'm hoping to come up with something
that works better when I go on holiday break in Southern California. The
family home in the Pasadena area, has a nice act yard and so thus I will be
able to stretch of wire so that I can hopefully gain an appropriate tuning
residence on say 80 through 10 m. Also local hams have suggested going to an
outfit called CCD and Canada's and seeing what they have to offer in terms
of a usable lantana. I'm curious to know what your thoughts are on that one.
Thank you in advance for any suggestions you all might be willing to offer.
Please excuse the length of this post, because what I am using his dictation
software to write it. I hope that this clarifies the information that I'm
trying to get from this list. 73 and have a great day.
On Nov 30, 2010, at 7:42 AM, Lloyd Rasmussen wrote:
> Because my old grounded-grid sweep-tube amplifier doesn't present a good
> 50-ohm match at its input, I will run an auto-tune on the current antenna
if
> I'm running barefoot, or run an auto-tune on the linear amplifier if I am
> going to be using that. That's in addition to reducing the power from 100
> watts to about 50 when driving the linear. I don't use any sort of
antenna
> tuner between the output of the linear amplifier and the antenna. In
> general, your transceiver will see a different load when comparing the
> antenna (barefoot operation) to the linear amplifier's input. So for
> maximum power transfer, you may want to readjust the transceiver's tuner
> between the two conditions on a particular frequency. The tuner in the
> FT-950 is only rated for 3:1 SWR maximum, but I've seen it work into some
> SWR's that are higher than that.
>
> I'm not sure what Maurice is talking about, although if you don't get a
good
> match between your rig and an antenna, your signal is going to be quite
weak
> and noisy.
>
> 73,
> Lloyd Rasmussen, W3IUU, Kensington, Maryland
> Home: http://lras.home.sprynet.com
> Work: http://www.loc.gov/nls
>
>
>> -----Original Message-----
>> From: For blind ham radio operators
[mailto:[log in to unmask]]
>> On Behalf Of Steve Dresser
>> Sent: Monday, November 29, 2010 10:49 PM
>> To: [log in to unmask]
>> Subject: Re: Looking for a blind friendly antenna tuner?
>>
>> Tom,
>>
>> The internal tuner would indeed be vaporized if it were actually
connected
>> to the amplifier's output, but it is not. Actually, the problem with
>> trying
>> to use the internal tuner while running the amplifier is that you would
be
>> trying to match the output of the radio to the input of the amplifier
>> rather
>> than matching it to the antenna. Even if you were using a linear that
>> only
>> generated 100 watts, you'd have to bypass the internal tuner because your
>> antenna is no longer directly connected to the radio while the linear is
>> in
>> use.
>>
>> Steve
>>
>> ----- Original Message -----
>> From: "tom behler" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Monday, November 29, 2010 21:16
>> Subject: Re: Looking for a blind friendly antenna tuner?
>>
>>
>>> With all due respect, I agree with what Howard is saying here.
>>>
>>> I have found the auto-tuner in the TS480 to be very forgiving.
>>>
>>> I do use a manual tuner as well, but only when using my Ameritron Al811H
>>> amplifier, since the auto-tuner in the TS480 would probably be vaporized
>>> with the higher power level.
>>>
>>> 73 from Tom Behler: KB8TYJ
>>>
>>> ----- Original Message -----
>>> From: "Howard Kaufman" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Monday, November 29, 2010 9:14 PM
>>> Subject: Re: Looking for a blind friendly antenna tuner?
>>>
>>>
>>> What does a signal to noise ratio have to do with a tuner?
>>> The tuner in the 480 will tune anything under 8-1. They have no idea
>> what
>>> they are talking about!
>>>
maurice amateur radio call sign,kd0iko.
national Federation of the blind of Cole Rondo assisted newsline
coordinator, office phone 970.
373-3076 Northern Colorado amateur radio club tried Vander, newsletter
editor. University of Northern Colorado student e-mail address ,
[log in to unmask]
note this message has been dictate by using MacSpeech dictate, Some words
may be spelled incorrectl, may also be in the wrong context.
Please forgive any errors in the text of this communication.
Thank you very much forreading this.
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