[hpsdr] MUNIN III

[Kjell Karlsen]

Hi All.

It seems to be a lot of interests for both of the PCB´s. As I am mostly  
interested in builders that can do tests of the units to measure the  
linearity(IMD) on the PA and loss/isolation of the T/R switch, I have to  
give them priority.

Please contact me directly to avoid "noise" on the reflector!

73, Kjell


På Mon, 14 Aug 2017 21:11:57 +0200, skrev Kjell Karlsen <la2ni at online.no>:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi All.
>
> I have done a new layout of Munin II removing all the components ahead  
> of the gate transformer for the PA transistors. I have ordered some  
> prototype PCB´and when I get them I´ll build one or two prototypes and  
> test them. If the results are as good as the preliminary tests I have  
> done, I´ll publish the schematics and Gerber files so that if someone  
> want to collect a list and order PCB´s, it is fine. I have no intension  
> to do it myself.
>
> I have also ordered some prototype PCB´s for a 100W T/R switch. It is  
> not using any high voltage DC inverter for blocking during TX but just  
> rectify the HF and use it. I have tested it on 150W and I believe that  
> by just increasing the size of some of the inductors, it can be used up  
> to 500W. But that has to be tested.
>
> There is also an input for Pure Signal on the T/R Switch.
>
> So if someone is interested, I am going to have some spare PCB´s to send  
> them.I have uploaded the schematics to Google Drive.
>
> https://drive.google.com/open?id=0B24WScJ3UyUvWXBkT3A5M3NOM0U
> https://drive.google.com/open?id=0B24WScJ3UyUvWXkxOHQzWGlLNTQ
>
> 73, Kjell
>


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