[TenTec] OT: Question to the group

[Gary J FollettDukes HiFi]

I’ll just stay with resonant antennas…

Gary


> On Jul 18, 2016, at 12:48 AM, rick at dj0ip.de <Rick at dj0ip.de> wrote:
> 
> Stating individual cases where something worked proves nothing.
> I've had half a dozen cases where it did not work and other matchboxes did.
> 
> In order to gain clarity on this, you must try it with all kinds of
> antennas; resonant antennas, long antennas, short antennas, odd sized loops,
> etc.
> 
> What the Johnson does well is push equal amounts of current into both wires
> of the feedline with relatively high efficience, if and only if it finds a
> match.
> What it does poor is match over a very broad matching range.
> 
> You don't have to trust me; try it as I have and compare it to an MFJ-974 or
> MHF-976.
> 
> OR... simply read the ARRL test report where the ARRL shows several balanced
> matchboxes and their matching ranges, including the JVM.
> 
> Now I guess I have to go research the issue it was printed in because it's
> probably too much work for some of the readers.
>> "A New Generation of Balanced Antenna Tuners", by Joel Hallas, W1ZR, QST
> September 2004. 
> 
> OR, simply do what I have said her MANY TIMES, go to my web site, find the
> page on MATCHBOX-SHOOTOUT
> And read the page, plus download the file at the bottom of the page.
> THERE you will find a nice colorful Excel spreadsheet comparing the matching
> range of the various matchboxes.
> THERE you will see that the JVM was indeed limited in matching range.
> 
> THEN go read my web page on how to fix it.
> 
> AND THEN YOU WILL HAVE THE BEST MATCHBOX EVER!  ;-)
> 
> 73
> Rick, DJ0IP
> 
> 
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Carter
> Sent: Saturday, July 16, 2016 9:32 PM
> To: tentec at contesting.com
> Subject: Re: [TenTec] OT: Question to the group
> 
> On 7/16/2016 10:13 AM, Carter wrote:
>> On 7/15/2016 6:59 PM, Jim Allen wrote:
>> 
>>> I had one of those [135 foot dipole fed with ladder line], not at  > 
>>> 60', about half that.  CC&Rs and all that.
>> 
>> The exact setup I've got, also at 30 feet.
>> 
>>> What is a "well designed truly balanced antenna tuner?"  From what  > 
>>> I've read, there aren't many.
>> 
>> Johnson Matchbox, kW or 275 watt version, not "perfection" but 
>> certainly very good -- and readily available at a fairly modest price.
>> 
>> Just my 2 cents...
>> 
>> Carter   K8VT
>> 
> 
> Sorry, forgot to mention it earlier...
> 
> Not to say my Johnson kW matchbox is the "best ever"; however, it works
> flawlessly  with my FT1000MP and 135 foot ladder line fed dipole on ALL
> (including WARC) bands. Worst case is 2.1:1 on 30 meters, all other bands
> 1:1.
> 
> Carter   K8VT
> 
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