: den 9 februari 2021 23:34
Till: topband
Ämne: Topband: The Magic-T (link correction)
Today I uploaded a video to my RX series which explains the Magic-T combiner.
I have received a few emails asking me “how do I make the magic-T”? so I
thought a video would be helpful.
I show the method
Joe, Rick
I've been thinking too much about quadrature (I, Q) signals recently hence I
took by mistake the combiner from VE6WZ's film as a 90 degree device. Actually
it is a 0 degree combiner, so my question was groundless.
Thank you for your replies
Have a good afternoon
Piotr, SP2BPD
The 90 degree hybrid is a third type of hybrid combiner,
distinct from the 0 degree and 180 degree types. It
is typically used for 4 square phasing. All 3 combiners
basically have a 3 dB insertion loss for signals having
appropriate phase conditions.
What you say is true to the extent that
On 2021-02-10 5:25 PM, P H via Topband wrote:
A loss of 3 dB may be like "to be or not to be" of a QSO on 160
meters.
That is extremely unlikely. The limiting factor on 160 meters is
signal to noise ratio, not absolute signal levels. Most amateur
receivers have absolute sensitivities of
Hi All,
Rick I have to agree with you up to a point. Your 9 circle and other 8
circle receiving arrays except mine are on wide footprints and only use 4
active antennas at a time. All of my antennas are reduced footprint antenna
arrays which require much more phasing accuracy for optimum
My impression is that a hybrid combiner, which introduces 90 degree shift
(hence two identical signals of amplitude A fed to its inputs will give in
total a signal with the amplitude of 1.41*A) is 3dB less efficient in
comparison to a simple combiner where A+A gives 2*A at the output.
Do you
Ham radio literature often IMHO misuses the term
"magic tee" to refer to a transformer-based
0 degree hybrid combiner/splitter.
AFAIK, a magic tee is a WAVEGUIDE device as explained here:
https://www.tutorialspoint.com/microwave_engineering/microwave_engineering_eh_plane_tee.htm
and here:
d.com/magict.html
> Lee K7TJR OR
>
> -Original Message-
> From: Topband On Behalf Of
> donov...@erols.com
> Sent: Tuesday, February 9, 2021 3:28 PM
> To: topband
> Subject: Re: Topband: The Magic-T
>
>
> This is the corrected URL for Steve's Magic-
://michaelgellis.tripod.com/magict.html
Lee K7TJR OR
-Original Message-
From: Topband On Behalf Of
donov...@erols.com
Sent: Tuesday, February 9, 2021 3:28 PM
To: topband
Subject: Re: Topband: The Magic-T
This is the corrected URL for Steve's Magic-T video
www.youtube.com/watch?v
Steve, Thank you Steve I always enjoy your videos. Will watch it later. Thanks
Fred KB4QZH
Original message From: VE6WZ_Steve Date:
2/9/21 5:46 PM (GMT-05:00) To: topband Subject:
Topband: The Magic-T Today I uploaded a video to my RX series which explains
the Magic-T
This is the corrected URL for Steve's Magic-T video
www.youtube.com/watch?v=_Bbt1IcC4bk
73
Frank
W3LPL
- Original Message -
From: "VE6WZ_Steve"
To: "topband"
Sent: Tuesday, February 9, 2021 10:29:54 PM
Subject: Topband: The Magic-T
Today I uploaded a v
Today I uploaded a video to my RX series which explains the Magic-T combiner.
I have received a few emails asking me “how do I make the magic-T”? so I
thought a video would be helpful.
I show the method for winding and building the Magic-T combiner and I explain
how it is used in phased RX
Today I uploaded a video to my RX series which explains the Magic-T combiner.
I have received a few emails asking me “how do I make the magic-T”? so I
thought a video would be helpful.
I show the method for winding and building the Magic-T combiner and I explain
how it is used in phased RX
13 matches
Mail list logo
