That just shows the failings of SS Amps. A 1.3:1 SWR equates to 1.7%
reflected power. Any
Amp that can't handle that has no place in my shack.
As for tube amps, just shows the benefits of a tuneable Pi-Network.
I am surprised the Quadra was that bad.
73, Dick, W1KSZ
On Sat, Oct 26, 2013 at 12:03 PM, Mark Robinson <markrob@mindspring.com>wrote:
> I looked at the LPDA and wasn't impressed by the front to back ratio, so I
> installed an Optibeam OB11-5. I have been very happy with it.
>
>
> Mark N1UK
>
>
> ----- Original Message ----- From: "Pete Smith N4ZR" <n4zr@contesting.com>
> To: <towertalk@contesting.com>
> Sent: Saturday, 26 October, 2013 2:19 PM
>
> Subject: Re: [TowerTalk] Tower and antenna decisions
>
>
> My Yaesu Mark 5 would begin to roll back its power output over about
>> 1.8:1. What really bugs me about LPDA's is the terrible tradeoff between
>> weight and size and gain/directivity at any given frequency.
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network at
>> http://reversebeacon.net,
>> blog at reversebeacon.blogspot.com.
>> For spots, please go to your favorite
>> ARC V6 or VE7CC DX cluster node.
>>
>>
>> On 10/26/2013 1:56 PM, steve jobes wrote:
>>
>>> Rick I disagree with your statement. As a owner of a Tennadyne T-10 and
>>> currently a T-12 your statement is flat out wrong. I swept my T-12 with my
>>> rig expert AA-230 analyzer and it was below 2-1 across the 13-30 mhz.
>>> range. Not sure what you are talking about, OR WHAT BRAND. But to say
>>> mediocre SWR is a false statement.
>>>
>>> 73,
>>> Steve W1DXH
>>>
>>>
>>> -----Original Message-----
>>> From: Richard (Rick) Karlquist <richard@karlquist.com>
>>> To: towertalk <towertalk@contesting.com>
>>> Sent: Fri, Oct 25, 2013 7:25 pm
>>> Subject: Re: [TowerTalk] Tower and antenna decisions
>>>
>>>
>>>
>>> I briefly looked at log periodics and one thing
>>> that hasn't been discussed here is the mediocre
>>> SWR of LPDA's. You're pretty much going to have
>>> to use a tuner, and you also have increased feedline
>>> loss. Might work for some users, but I'm sticking
>>> with my SteppIR antennas (3 of them so far).
>>>
>>> An LPDA would however, make a good broadband receive
>>> antenna for a skimmer, if you want to optimize
>>> one direction.
>>>
>>> Rick N6RK
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