Hello Ed, the HA1YA and DB6NT transverters are also considerably better than the DEMI designs which are 3 generations behind. I have been in serious pursuit of low PN and low IMD on 144 and 432 and I found that either of the aforementioned transverters with a K3S were many times better than anything else. I looked at almost everything out there, it took 2 years but there really was no other choice. There used to be 3 choices but sadly the Anglian (144) and Iceni (432) kits from G4DDK are no longer an option, on 70cms I have an Iceni. With the K3S , Iceni and a TV TX I am achieving TX 3rd orders of -53dBc, I am so pleased with this. The composite noise @ 20kHz is 33dBc/Hz better than any other radio that I have measured. On 2m 25dB better for composite noise I am still working on 2m intemods, so far the whole chain is -40dbc 3rd orders but I would like to improve this by at least 6dB, the problem is an LDMOS driver and nothing to do with the K3S or HA1YA transverter.
I have a bit more to say about the K3S and TX IMD on 6m in another post. Regards Conrad PA5Y -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Edward R Cole Sent: 05 July 2019 18:02 To: Elecraft Reflector <[email protected]> Subject: [Elecraft] (no subject) Kjeld, I agree with Conrad PA5Y, both Kuhne Engineering or HA1YA make very good transverters and are available in EU. I would add the DEMI L-series transverter which now is made by a company called Q5 (located in US) for any NA hams reading the mail on this topic. I use DEMI transverters on digital-eme on 144, 1296, and higher (have had 144,222, 432, 1296, 3456, and 10-GHz models). I also use preamps located at antennas on 6m, 2m, 432, 1296+ Even though local electronic noise can be high at times, when its not they make a huge difference. Only for 6m (50-MHz) would I agree that it might not give much help (but if you have a K3, it needs either a PR6 or other preamp to bring up 6m &10m sensitivity; not an issue with K3s or K4). MY KX3 with internal preamp ON = my K3 + PR6 in sensitivity on 6m) The early reports on the IC-9700 were not favorable for freq stability (though I read they had addressed this, lately). Still investment in K3s + good transverter will beat the IC-9700 without a doubt. 73, Ed - KL7UW From: Kjeld Holm <[email protected]> To: Elecraft Reflector <[email protected]> Subject: [Elecraft] Digital modes on 144MHz only Message-ID: <am0pr03mb553863de40cde9d3f09ee28f9d...@am0pr03mb5538.eurprd03.prod.outlook.com> Content-Type: text/plain; charset="us-ascii" Digital modes on 144MHz only I plan for a second station to use for digital modes on 144MHz only. If you look at performance only (no price, no ergonomics, no use outside digital modes on 144MHz) what would you prefer 1) K3/K3S with internal transverter 2) IC-9700 In both cases I plan to use a 1kW amplifier. Vy 73 de OZ1CCM, Kjeld 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
