144 MHz Phase Shifter
50 MHz Phase Shifter
144
MHz Noise Killer, 2 Meter QRM Eliminator, VHF X-Phase,
50 MHz Noise Killer or however you call this thing...
Monoband for 20÷50
MHz
/ 110÷160
MHz / 400÷500
MHz / 1296 MHz
New Redesigned
20÷50 MHz Phase Shifter board
144 MHz Phase Shifter board
Italiano
English
Board available by Sandro I0JXX
VHF Phase Shifter by IZ3KGJ - SSB noise reduction (27/04/2021) https://youtu.be/vnp1QpcUdbk
VHF Phase Shifter by IZ3KGJ - CW noise reduction (27/04/2021) https://youtu.be/1JyznKwfEyM
VHF Phase Shifter by IZ3KGJ - Test #1 (20/03/2021) https://youtu.be/JO8PKuxDgUk
VHF Phase Shifter by IZ3KGJ - Test #2 (20/03/2021) https://youtu.be/fS05gNaO9Y4
Noise Reduction: a new entry :-( 12/12/2020 https://youtu.be/tLTz2z8aijI
Noise Reduction on SDR-Radio for EME https://youtu.be/9AQYSS60G-Y
Noise Reduction on SSB Stations https://youtu.be/WW5J4rLjJ34
Noise Reduction: my very first tests with the prototype https://youtu.be/RXkSRgXLsEk
Even on EME! Some tests made by IK6HRA https://youtu.be/HA-8LHQqPzw
Other tests: noise cancelation, beat cancel, nearby station cancel, Moonbounce noise cancel
https://www.youtube.com/watch?v=IeDLh1o120M
https://www.youtube.com/watch?v=H3NR_fGptQE
https://www.youtube.com/watch?v=XtAuEsHBNKg
https://www.youtube.com/watch?v=c5FeD9HHk_4
Updates
18 dec 2022 Added new file with info, instructions and suggestions about the shifter. In English
30 sep 2021 New 50 MHz Phase Shifter board + test "20-50 MHz Phase Shifter by IZ3KGJ - Misure ITALIANO" due to some discontinued components from Minicircuits
27 apr 2021 Added 2 last videos
20 mar 2021 Added instructions and suggestions file and 2 new videos
12 dec 2020 Added a couple of videos and link to I0JXX
18 nov 2020: Added English description file
24 jul 2020: Added Measurement tests ITA file
06 may 2020: Here you find my latest work. At the moment it's all written in Italian, the English translation will follow
Mark (mercoledì, 07 aprile 2021 10:23)
Purchased the 144mhz phase shifter in a bid to reduce RFI from a neighbours LED light which was affecting weak VHF airband signals. I was stunned at the efficacy of the phase shifter. The RFI was almost totally eliminated. It's a fantastic piece of kit! Highly recommend it.
Conrad Farlow PA5Y (martedì, 24 novembre 2020 12:57)
I have placed an order at I0JXX for a PCB. I will use it with my tropo system, I do not need it with my Xpol eme system as typically elevation is high in the direction of the noise source.
There are a few things that are not mentioned in your user guide.
1. Typical noise antenna requirements
2. Protection of the front end of the phase shifter during TX by using a bypass switch.
Item 2 may be obvious but I expect some may not realise that this is important. It would have been more convenient to have a PTT activated bypass switch on the PCB but of course I can provide it externally. Without such protection I would expect the front end to be destroyed during TX periods.
73
Conrad PA5Y
Sven (mercoledì, 09 settembre 2020 16:52)
Do you have this ready made for working in a box together with the station?
144 MHz Phase Shifter
Price?
SM7DTT/Sven
sven@sm7dtt.com
Trond Thorman (martedì, 07 luglio 2020 19:57)
I really need this device. Just trying hard to get on to the moon. I have invested in 4x8 el, SM7DTT EME yagis, SPID AZ/EL rotor only to find terrible crackling noise a) in certain direction b) elevations. The noise level can exceed 3dB easily.
My setup for is IC7700, Kuhne transverter and HA something LNA at base of tower. Having a hell of a good take off and so really good reach on MS but EME...nada!!!! So if there is anything that can help me with the crackling noise level, ill be delighted.
Do let me know how ot obatin the kit of yours. Best 73 from London (IO91UK)
Trond (Email: trond@radius.co.uk)