[TenTec] Antenna is up, but the coupler doesn't like 160 meters

[Mike, K9UW]

Try http://n6ie.com/Ten_Tec_238.html

73, de Mike, K9UW
Amherst, WI


On 10/12/2013 12:15 PM, Clayton Brantley wrote:
> Sorry guys.  I am using Yahoo and they are going thru a downgrade in their services.  They have went from
> a working system to something a pre-schooler would dream up.
>
> Here is a link to the web site for the 229/238 tuner mod:
>
>          www.n6ic.com/Ten_Tec_238.htm
>
> Hope this works, if not simply Google TenTec 229 mod and you should see it.
>
> Clayton N4EV
>
>
>
>
>
> On Saturday, October 12, 2013 1:06 PM, Rick - DJ0IP / NJ0IP <Rick at DJ0IP.de> wrote:
>   
> THAT'S THE PROBLEM, MIKE!  (the Chinese have smaller feet than we do)
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Mike Bryce
> Sent: Saturday, October 12, 2013 5:59 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Antenna is up, but the coupler doesn't like 160 meters
>
> bob and the gang,
>
> inserted the 259 and with the 1:1 balun.
>
> resonate freq is 2.487 or there abouts
>
> so the antenna as it sits is too short.
>
> I'll re-check the length with my harbor freight made in china 300 foot tape
> and see what each leg is (length wise)
>
>
> Mike Bryce, WB8VGE
> the heathkit shop
> SunLight energy systems
> J e e p
> o|||||||o
>
>
>
>
>
>
> On Oct 12, 2013, at 10:42 AM, Bob McGraw - K4TAX wrote:
>
>> The extra / external cap is used across the capacitor bank, starting at
> position #4 and #5.  Both on the Low and High Z sides.  I find the text is
> incorrect, the schematic is correct.  Yes a .01 is way too much C by a
> factor of 10x.
>> If you have a means to do so, what is the natural resonant frequency of
> the antenna?  I use my MFJ-259 as a grid dip meter effect to find the
> resonant frequency.  I'm not speaking of some frequency where the SWR is 1:1
> or such.
>> I take a different approach to antennas.  I first start with a resonant
> antenna at the desired frequency, then adjust the height of the antenna to
> attain the desired feed point impedance.  I saw Jim Brown, K9YC mentioned
> this in his earlier post as he used different coax impedance lines dependant
> on the height of the antenna.  I am not one to "prune" the length of the
> antenna for some SWR value.  Now in cases I know we can't get the antenna at
> different heights specially as we get to 160M and to some extent 80M.  In
> these cases, the typical height above ground does bring the center Z to 20
> to 30 ohms.  Nothing wrong with this.  With low loss coax or a balanced
> feed, just let the tuner deal with it.  That's what it is supposed to do.  I
> find having a resonant wire is more effective and easier to effect a good
> match.
>> 73
>> Bob, K4TAX
>>
>>
>>
>>
>>
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