[600MRG] U3S with T/R relay

[Edward R Cole]

Hans,

I have no amplifier or antenna on 2200m and no 
license to operate there (also no plans 
to).  Looks like U3S is very useful over most 
common WSPR bands.  I have only used it on 
630m.  Seems little VHF weak-signal interest by 
those in AK.  I am too involved in eme, ms, 
satellite for HF WSPR.  I will probably only 
frequent occasional HF nets and practise CW on HF.

Note that accurate time (<1 sec error) is 
required for WSPR and other WSJT modes.  I use a 
NIST source from the internet but am planning to convert to GPS.

I am in process of moving all internet use to my 
win10pro laptop (e-mail was moved on Oct. 
29).  The winXP computer will run off-line and 
use GPS time for all ham radio software (thus 
avoiding increasing hacking attempts, malware 
attacks) since MS unsupport of the OS.

73, Ed

At 08:28 PM 11/2/2016, Hans Summers wrote:
>Hi Ed
>Â
>Impressive kit.  Good that you are agreeable to 
>writing in extra code to implement Tx delay functioning.
>Probably a good solution for those with no 630m transmit capability.
>
>
>I will try and get it done in the next week or so.Â
>Â
>I have a K3 which operates down to 490-KHz with 
>mw output and after I update with the new synth 
>board designed for the K3S, it will operate down 
>to 2200m.  I converted a 100w NDB transmitter 
>by removing the xtal osc. and capacitively 
>coupling 0.1mw able to get full output.  So I 
>run digital modes via computer interface.
>
>
>The Ultimate3S kit works nicely on 2200m too. 
>And does JT65. It works across all bands 2200m 
>to 2m, but we only have the plug-in Low Pass 
>Filter modules for 2200m to 6m. There are some 
>designs for 4m and 2m on the LPF kit page 
><http://qrp-labs.com/lpfkit>http://qrp-labs.com/lpfkit 
>. GPS discipline is very useful, for 
>disciplining time/frequency. I even had reports 
>of one person using the Ultimate3S as a CW beacon on the US 222MHz band.Â
>
>73 Hans G0UPL
><http://qrp-labs.com>http://qrp-labs.com
>
>No virus found in this message.
>Checked by AVG - <http://www.avg.com>www.avg.com
>Version: 2015.0.6201 / Virus Database: 4664/13338 - Release Date: 11/02/16

73, Ed - KL7UW
http://www.kl7uw.com
     "Kits made by KL7UW"
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