[Boatanchors] Should dummy load oil ever need to be changed?

[W2HX]

Does the length need to be something specific based on the frequency you're' using?

 
73 Eugene W2HX
 

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Ray
Sent: Saturday, August 25, 2012 1:14 PM
To: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Should dummy load oil ever need to be changed?

A useful dummy note note which may interest some:

A piece of coaxial cable open or shorted at the far end with a loss rating of about 15 db or more at your frequency of interest, will provide a very nice dummy load.  It will provide a return loss of about
30 db (-15db forward loss and -15db reverse loss) .

If you use a piece of cable rated at about 20 db of loss at your frequency of interest, you will have a near laboratory quality dummy load (40db RL).

Make sure the cable is rated sufficiently for the power level you are going to use it with.
Ray, W4BYG


On 8/25/2012 12:09 PM, Bill Cromwell wrote:
> On Sat, 2012-08-25 at 11:45 -0400, Wayne D Anderson wrote:
>> Gentlemen
>>
>> It seems to me that in a hobby that found the use of a lightbulb as an acceptable  load, the Cantenna looks like a pretty good alternative.
>>
>> 73
>> K7WDA
> Hi,
>
> There are some radios that went to war with a light bulb for tuneup.
>
> 73,
>
> Bill  KU8H
>
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