SmartSDR v3.4.23 and the SmartSDR v3.4.23 Release Notes | SmartSDR v2.9.1 and the SmartSDR v2.9.1 Release Notes
SmartSDR v1.12.1 and the SmartSDR v1.12.1 Release Notes
Power Genius XL Utility v3.7.32 and the Power Genius XL Release Notes v3.7.32
Tuner Genius XL Utility v1.1.16 and the Tuner Genius XL Release Notes v1.1.16
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power genius IMD at 2000w
20M into perfect load 60 amps @ 47V = 1800 out.
Not able to measure IMD.0
15M perfect load: 56A at 50V for 2kw power out
80M perfect load: 56.3A at 51.9V for 2kw power out.
These are steady carrier (tune function on 6600).
Also not able to measure imd The amp is such a champ.0
KF4HR Member ✭✭Just curious. Does the PG-XL auto limit itself to 1500 watts?
KC2QMA_John Member ✭✭Sure is nice to have the extra headroom for a very clean signal.0
20M 1750; 160M 1650 limit all others 2K. They call it automatic power control. APC The amp has protection monitoring against overdrive and SWR conditions.0
KF4HR Member ✭✭Nice.
John , How do you know that the signal is very clean ? Have you tried a 2 or 3 tone IMD test? Howard VE2AED
I have heard that the "Power Genius " does not have any antenna tuner , I wonder if I missed this detail . I am attaching a link to an IEEE paper "Output Impedance Mismatch Effects on the Linearity Performance of Digitally Predistorted Power Amplifiers " The paper also covers non predistorted amplifiers and the short story is that any impedance mismatch to the load can degrade linearity simply by the magnitude and phase of the reflected power . 73 de VE2AED link https://www.researchgate.net/publication/270788754_Output_Impedance_Mismatch_Effects_on_the_Linearity_Performance_of_Digitally_Predistorted_Power_Amplifiers1
The External Tuner is in development, no ETA as of yet.0
Burt Fisher Member ✭✭How long has it been in "development?"0
The tuner should be an integral part of the amp ,it can never be an option the amp will be too distorted with "any" standing waves depending on the phase angle of the reflected wave regardless of what the SWR is ! So as I now understand financial budget is now related to non linearity of ~10Db .
Bill -VA3WTB Member ✭✭✭It will be an integral part of the amp. Flex makes outstanding products,,why would this be any different?0
Bill , it appears that Flex has already begun shipping and as this paper trail indicates this is to be an "external" tuner and is still in development ,thus it appears that the amp will be shipped and the tuner becomes an external option . Thank you es 73 Howard VE2AED0
HCampbell WB4IVF Member ✭✭
The tuner has always been advertised as an external option! Last I heard, it should be well-integrated with Flex (as Bill stated), and will be offered with an optional remote kit to allow installation at the antenna if so desired. That would be a great feature in some installations and was one of the reasons given for opting for an external tuner.
To me the main issue is the long, long wait, which is giving my ATR-30 a new lease on life. (-:
BTW, no amp that I am aware of has an internal tuner capable of a truly wide matching range at high power. For that I’d look at an HF-Auto or similar.Howard/WB4IVF
Howard (2 ) this is Howard (1) there are 2 ldmos amps that I know of that have full power tuners , I have one of each so far KPA1500 and RFkit .
Both can tune a full 3:1 in both directions ( 17 - 150Ω ) at 2KW although I don't recommend 2KW , I measure IMD with 2 tone ~ -35Db at 1.5KW
Howard (1) VE2AED https://www.qrz.com/lookup/ve2aed
HCampbell WB4IVF Member ✭✭
Hi Howard1 –
Yes, the internal KPA and external Flex tuners should be capable of handling full power, but at a quite limited 3:1 matching range (the advertised Flex tuner spec is also 2000W @ 3:1 SWR).
As I said, the physically separate Flex tuner can be placed at the amp, or as Flex has stated, at the antenna with an optional remote kit. In addition to being closely integrated with the Flex radios/amp, to me that is an important feature and I may well take advantage of it. Some prefer to have the tuner in the same box as the amp, and I can understand that too, but I prefer a separate tuner for the above reason.
For any of these amps, if a wide matching range at high power is required you’d need a heftier external tuner. I have not seen any published IMD specs / test results for the Flex amp as of yet.
Howard (2) ,
I hope they test 3rd order IMD into 15 meter multiples of coax into an antenna with 2:1 SWR and without the antenna tuner ... "on 20 meters"0
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