Circular Polarization
Chris
VE3CEA
Sent from my iPhone
> On Oct 15, 2022, at 11:03, Jim W7RY <jimw7ry@gmail.com> wrote:
>
> What is CP? Better clue us Americans as to what that is.
>
>
> Jim W7RY
>
>
>> On 10/13/2022 7:37 AM, Conrad PA5Y wrote:
>> I am going to attempt to use 2 identical monoband tube amplifiers to
>> generate CP but before I start I have a question. The 90 deg delay for CP
>> comes from the array orthogonal physical boom separation. So the amplifiers
>> must be in phase at the outputs.
>>
>> I presume that this has been done in broadcast applications and I would like
>> to know, assuming everything is tuned correctly how close the phase likely
>> to be?
>>
>> I have line stretchers for the inputs, I have extremely good phase matching
>> on the Wilkinson splitter and 2 identical directional couplers that I have
>> tuned for good phase and amplitude matching. I can also measure the relative
>> amplitude and phase of the 2 amplifiers accurately. Small phase and
>> amplitude adjustments are ok but I have no idea what to expect with tube
>> amplifiers.
>>
>> This was not really planned but a 2nd amplifier became available, so I
>> thought why not? The tubes are becoming scarce so this way I can be a lot
>> more gentle on them.
>>
>> Regards, Conrad PA5Y
>>
>>
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>
> --
> Thanks and 73, Jim W7RY
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