I can recommend the K7LXC/N0AX antenna book. It's what convinced me to buy the
Skyhawk.
73 de Gene Smar AD3F
Sent from my Radio Shack TRS-80 model 100 laptop
On Tue, Mar 31, 2026 at 12:14 PM, Joe Subich, W4TV via
TowerTalk<towertalk@contesting.com> wrote:
The 25 year old K7LXC/N0AX data showed that even a *small*
interlaced tribander of that era (the Force 12 C3) significantly
outperformed both the TA33 and a 2 element Quad (Gem Quad).
A modern *small* multi-band antenna like the JK Navassa or XR5-JK,
the Innovantennas XR5 or XR6, Monobeam Penta 10 cover five bands
in the same boom length and general size as the old small trapped
tri-band antennas while providing performance somewhat better than
the 25 year old C3.
73,
... Joe, W4TV
On 2026-03-31 11:12 AM, Bill Eisinger wrote:
> Given the advances in computer modeling technology over the years I don't
> understand how anyone could believe that a trapped antenna based on a 40 year
> old design (such as the Mosley) could possibly perform better than current
> interlaced element designs...JK, Optibeam, Skyhawk, etc. Small trapped
> tri-banders certainly have their place...size, weight, etc., but will they
> win the performance wars...not likely.
>
>
> ________________________________
> From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Joe Subich,
> W4TV via TowerTalk <towertalk@contesting.com>
> Sent: Tuesday, March 31, 2026 7:57 AM
> To: dj7ww@t-online.de <dj7ww@t-online.de>
> Cc: contesting, towertalk <towertalk@contesting.com>
> Subject: Re: [TowerTalk] New antenna?
>
>
> On 2026-03-31 3:36 AM, dj7ww@t-online.de wrote:
>
> > But I doubt that dipoles work as well as the TA36.
>
> The range tests by K7LXC and N0AX some 15 years after I
> got rid of the TA36 proved my "feeling" correct. Mosley's
> "large tribander" (Pro 77) showed negative gain compared
> to a dipole on 10 meters and the phone portion of 20 meters.
> In the second report, the Pro 57B showed negative gain
> (average) on both 10 and 15 meters.
>
> In both cases, those results were between 4 and 6 dB
> inferior to all other antennas in the large tribander class
> (Skyhawk, C31XR, TH6/7, TH11, KT34-XA, X9).
>
> Considering that the K7LXC/N0AX tests were performed by
> directly comparing the tribanders with a dipole at the
> same height, I will stand by their results and my own
> anecdotal observations over "receive only" observations
> that have no basis for comparison.
>
> 73,
>
> ... Joe, W4TV
>
> On 2026-03-31 3:36 AM, dj7ww@t-online.de wrote:
>> I would not look back to a three element trap yagi either after installing 5
>> element Hygain monobanders.
>> But I doubt that dipoles work as well as the TA36.
>>
>> 73
>> Peter
>>
>>
>> -----Original-Nachricht-----
>> Betreff: Re: [TowerTalk] New antenna?
>> Datum: 2026-03-31T01:46:08+0200
>> Von: "Joe Subich, W4TV via TowerTalk" <towertalk@contesting.com>
>> An: "towertalk@contesting.com" <towertalk@contesting.com>
>>
>>
>> On 2026-03-30 7:18 PM, Peter Voelpel via TowerTalk wrote:
>>> Then how comes that they are always providing same or better signal
>>> strength then other tribanders?
>> They are not, as proven by proper range testing.
>>
>> My first tribander (50 years ago next year) was a Mosley TA36 ... I
>> quickly replaced it with a set of Hy-Gain antennas (204BA, 155BA,
>> 105BA) and never looked back. Comparatively, the Mosley was a lead
>> (HEAVY) dummy load and a set of dipoles performed as well.
>>
>> 73,
>>
>> ... Joe, W4TV
>>
>>
>> On 2026-03-30 7:18 PM, Peter Voelpel via TowerTalk wrote:
>>> Then how comes that they are always providing same or better signal strength
>>> then other tribanders?
>>>
>>> -----Original Message-----
>>> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim
>>> Brown via TowerTalk
>>> Sent: Dienstag, 31. März 2026 00:41
>>> To: towertalk@contesting.com
>>> Subject: Re: [TowerTalk] New antenna?
>>>
>>> On 3/30/2026 3:16 PM, Gary Smith wrote:
>>>> Suggest you get catalog from Mosley and consider one of their monobanders
>>> if you don’t want traps.
>>>
>>> Monobanders are a great idea IF you have the real estate to rig them.
>>> Moseley's big tribander came in dead last in the testing that N0AX and
>>> K7LXC did in 1999. It even had negative gain (dBd -- with respect to a
>>> dipole) on 15 and 10M, only 0.7 dB on 20M.
>>>
>>> 73, Jim K9YC
>>>
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