Remember the length of twinlead taped to the twinlead feeder with a couple
of NE-2 neon bulbs for an indicator?
It was in the handbook in the 1960's
Jim
N7FCF
----- Original Message -----
From: "Jeff Carter" <amps@hidden-valley.com>
To: <amps@contesting.com>
Sent: Thursday, April 23, 2009 11:15 AM
Subject: Re: [Amps] High SWR
> Nothing brought home standing waves to me like a slotted line. I haven't
> seen
> one of those since college, though.
>
> You can look at all the simulations in the world, but actually seeing the
> minimums and maximums on a line can't be beat for getting the concept
> through. It's a shame that more folks didn't get to see those things.
>
> Couldn't the average ham, especially those with enough engineering savvy
> to
> build or work on amplifiers set up a Lecher Line apparatus? I'm not sure
> what you'd use for a bulb nowadays that wouldn't affect the readings,
> though.
> Maybe a regular bulb would be good enough for the concept.
>
> Sounds like a good QST article, if somebody hasn't already done it.
>
> Jeff/KD4RBG
>
> On Thursday April 23 2009 14:02, you wrote:
>
>> It used to be in the old days 'reflected' power was measured with lecher
>> wires and a bulb so you could really 'see' the nodes on the transmission
>> line with a meter it's more of a 'black box' and misconceptions arise
>> I also use/used a slotted line for X-band measurements.
>>
>> - Scott
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