The old EF Johnson Matchbox, both the 275 watt and the 1 KW version were truly
balanced output.
That was the very best tuner design ever. The actual matching coil was the
balun.
Virtually every other tuner uses an unbalanced tuning system and then uses a
BALUN too couple to balanced feed lines. Therefore, no BALUN is, of course,
needed at the antenna.
I used 600 ohm balanced line once to feed a cubical quad (Gem quad) and it
worked extremely well.
Oh, I too always wonder why folks fret so much when they only get 90 watts
output instead of 100. no one anywhere can hear the difference between 90 and
100 watts, not even in a head-to-head shout down. Turn it down to 50 watts, use
half the electricity and the listener will barely tell the difference on the
other end.
Gary
W0DVN
> On Jul 15, 2016, at 5:59 PM, Jim Allen <jim.allen@longhornband.net> wrote:
>
> I had one of those, not at 60', about half that. CC&Rs and all that.
>
> What is a "well designed truly balanced antenna tuner?" From what I've read,
> there aren't many. I have an MFJ 974HB. There is the Palstar whatever the
> latest model nomenclature is. Rick has the whole run down on his extensive
> website.
>
> What is good at lower heights?
>
> 73 de W6OGC Jim Allen
>
> Sent from my iPad
>
>> On Jul 15, 2016, at 17:28, Scott Harwood <scotthsr@earthlink.net> wrote:
>>
>> Well, for 80 - 10 meters, how about a 135 foot wire dipole up about 60 feet
>> fed with 600 ohm open wire line into a well designed truly balanced antenna
>> tuner located right at the transceiver, as one example?
>>
>> Scott K4VWK
>>
>>
>> -----Original Message-----
>>> From: Jim Allen <jim.allen@longhornband.net>
>>> Sent: Jul 15, 2016 5:53 PM
>>> To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
>>> Subject: Re: [TenTec] OT: Question to the group
>>>
>>> What is "a low-loss matching and feed system into an efficient antenna?"
>>>
>>> This is the "Holy Grail" of amateur radio, if we can find it.
>>>
>>> 73 de W6OGC Jim Allen
>>>
>>> Sent from my iPad
>>>
>>>> On Jul 15, 2016, at 16:05, cegtv1 via TenTec <tentec@contesting.com> wrote:
>>>>
>>>> a low-loss matching and feed system into an efficient antenna
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