I did look up zepp antenna on google.
apparently it's called a zepp because it was the type of antenna used on a
zeppilin, you know, the airship.
A zepp antenna, the original, is an end fed half wave radiator, using a
quarter wave matching network, and fed with latter line, or whatever it was
called in the 1920's and 30's.
the half wave radiator would dangle below the zeppilin.
Nowadays, the word zepp, is used to describe any sort of dipole arrangement
fed with latter line or paralel non-coaxial type feedline.
I've seen both open non-insulated latter line, and insulated latter
line...the second being the newer incarnation I suspect.
also heard it called window line.
It's much more difficult to obtain, so that is why it has fallen out of
common usage I expect...that and most people desire an antenna to be fed
with non-radiating coax to reduce RFI near the shack and house and to
maximize the RF power that reaches the tuned radiating elements.
That and transceivers these days most certainly do not have a 300 or 450Ohm
connection on the back.
most tuners do, but again, availibility of that type of feedline is
difficult compared to 50 or even 75ohm coax.
73
Colin, V A6BKX
----- Original Message -----
From: "Lou Kolb" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 31, 2012 2:59 PM
Subject: Re: trapped dipole etc.
> True, Collin, but I often hear a half-wave dipole fed with ladder line in
> the middle referred to as a center-fed zep. Perhaps it depends on whom
> you
> ask. Anyway, the above-described antenna has always been my dream
> antenna.
> I love the flexibility. Lou
> Lou Kolb
> Voice-over Artist:
> Radio/TV Ads, Video narrations
> Messages On-hold:
> www.loukolb.com
> ----- Original Message -----
> From: "colin McDonald" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, May 31, 2012 3:06 PM
> Subject: Re: trapped dipole etc.
>
>
>>I always thought a zep antenna was two wires on each side, tied together
>>at
>> the far end and fed with latter line?
>> So for instance, 40FT of speaker wire on each side, open at the feed
>> point,
>> but electrically connected at the ends furthest from the feed point.
>> then the latter line connected to one on either side at the feed point,
>> leaving the other two open...maybe that is a completely different type of
>> antenna...
>> So, I need the definition of a zep, and the definition of a
>> doublet...maybe
>> google will yield some definitive answers...
>>
>> 73
>> Colin, V A6BKX
>> ----- Original Message -----
>> From: "Lou Kolb" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Thursday, May 31, 2012 11:40 AM
>> Subject: Re: trapped dipole etc.
>>
>>
>>>I don't know how accurate this is, but I've always understood a doublet
>>>to
>>> mean a dipole of some kind fed with ladder line. In other words, the
>>> same
>>> thing as a center-fed zepp. That's what all the CW old-timers call them
>>> and
>>> they seem to be a pretty reliable bunch. Apologies if I have it wrong.
>>> Lou, WA3MIX
>>> Lou Kolb
>>> Voice-over Artist:
>>> Radio/TV Ads, Video narrations
>>> Messages On-hold:
>>> www.loukolb.com
>>> ----- Original Message -----
>>> From: "colin McDonald" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Thursday, May 31, 2012 1:20 PM
>>> Subject: Re: trapped dipole etc.
>>>
>>>
>>>> can you describe how a doublet is constructed?
>>>> or is that just another term for a dipole?
>>>> I've never gotten a definitivvvvvve answer on that question.
>>>>
>>>> 73
>>>> Colin, V A6BKX
>>>> ----- Original Message -----
>>>> From: "Gary Lee" <[log in to unmask]>
>>>> To: <[log in to unmask]>
>>>> Sent: Thursday, May 31, 2012 7:09 AM
>>>> Subject: trapped dipole etc.
>>>>
>>>>
>>>>> Tom:
>>>>>
>>>>> an 88 foot doublet fed with ladder line works very well 80 through 10.
>>>>> it
>>>>> is somewhat narrow on 80, but usable with a tuner everywhere.
>>>>>
>>>>> If you discard 75 / 80, a 44 foot doublet is decent on 40 throu 10.
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