[hpsdr] munin pa update

[Georg Prinz]

hello Larry,

I put some pictures on http://www.qsl.net/dl2kp/ under lab20120909.
I am using my ersa soldering iron with various tips since 40
years.Nothing special. The solder is the old fashion low melting tin
Sn60 0,5mm (Fluitin and heat is all you need!HI).The tools are general
you will get at Radio Shack.

73, georg, dl2kp




Am Sonntag, den 09.09.2012, 08:43 -0400 schrieb lgpignolet at aol.com:
> Ho Georg,
>  
> I forogt to ask you..
>  
> Just curious,   What equipment did you use to build the Munin amp...?
>  
> Soldering station, solder, tweezers,  etc..
>  
> tnx's
>  
> Larry
> 
> 
> -----Original Message-----
> From: Georg Prinz <getpri at t-online.de>
> To: lgpignolet <lgpignolet at aol.com>
> Sent: Fri, Sep 7, 2012 9:53 am
> Subject: Re: [hpsdr] munin pa update
> 
> Hi Larry,
> 
> here you can get thin coax cable:
> 
> http://www.communication-concepts.com/index.php/coax-wire.html
> 
> 73, georg, dl2kp
> 
> 
> 
> 
> 
> Am Freitag, den 07.09.2012, 07:49 -0400 schrieb lgpignolet at aol.com:
> 
> 
> 
> 
> > Hi Georg...
> >  
> > I already had the conversation with Kjell and I  looked on the
> > internet..
> >  
> > Everything that size is semi rigid cable, very stiff material...
> >  
> > tnx's
> >  
> > larry
> > 
> > 
> > -----Original Message-----
> > From: Georg Prinz <getpri at t-online.de>
> > To: lgpignolet <lgpignolet at aol.com>
> > Cc: hpsdr <hpsdr at lists.openhpsdr.org>
> > Sent: Fri, Sep 7, 2012 7:27 am
> > Subject: Re: [hpsdr] munin pa update
> > 
> > Hi Larry,
> > 
> > it is a 1.85mm 25 ohm coax-cable marked up with FDR73A24.Fortunatelly,I
> > got it from Kjell, LA2NI. Unfortunately, I couldn't find it in the
> > internet. Maybe, Kjell can tell us which brand it is and where we can
> > get it.Or he could tell us a substitute.
> > 
> > 73, Georg, dl2kp
> > 
> > 
> > 
> > 
> > 
> > 
> > Am Freitag, den 07.09.2012, 06:51 -0400 schrieb lgpignolet at aol.com:
> > > Hi Georg
> > >  
> > > Can you tell what wire you used for L4 design..?
> > >  
> > > tnx's
> > >  
> > > Larry
> > >  
> > > 
> > > 
> > > -----Original Message-----
> > > From: Georg Prinz <getpri at t-online.de>
> > > To: hpsdr <hpsdr at lists.openhpsdr.org>
> > > Sent: Fri, Sep 7, 2012 5:18 am
> > > Subject: [hpsdr] munin pa update
> > > 
> > > ***** High Performance Software Defined Radio Discussion List *****
> > > 
> > > Hello,
> > > 
> > > actually I put two munin power amplifiers successfully into operation.
> > > 
> > > To those who are in a similar situation following hints:
> > > 
> > > My information is based on  two boards dated 04.03.2010 and drawing
> > > dated 19.04.2012.
> > > 
> > > 1. The center pad of L5 shall be grounded. See Picture munin_L5 on
> > > www.qsl.net/dl2kp
> > > 
> > > Drawing shall be updated accordingly.
> > > 
> > > 2. Picture munin_L4 on www.qsl.net/dl2kp shows L4 how it shall be done.
> > > Both ends of the secondary coil shall be facing towards T1 and T2. One
> > > end shall be longer to reach to the soldering pad for output behind the
> > > jack.The other end I soldered to nearby ground point.
> > > Furthermore, you see the correct mounting of T1 and T2. I put a copper
> > > bar beneath the MOSFETs not only for heat distribution, but also to be
> > > able to place drain and source connection without bending them on top of
> > > the board.
> > > 
> > > 3.The idling currents should be adjusted to get full power on all bands.
> > >   Kjell recommends for T3/4 500mA each and 1 A for T1/2 each. I am just
> > > experimenting around to get the correct value for my boards.At the
> > > beginning I didn't succeed with kjell's values to get full power.
> > > 
> > > 4. I was curious, if the output sma connector would be sufficient for
> > > 100W and even more.According to the data sheet it has a working voltage
> > > of 355V. With 200W you will get a voltage of 70V at 50 ohms.So that
> > > should be ok.
> > > 
> > > 
> > > At the end I will not forget to thank Kjell for his great development
> > > and all the help he gave me to get everything into operation!
> > > 
> > > Vy73,
> > > 
> > > Georg, dl2kp
> > > 
> > > 
> > > 
> > > _______________________________________________
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> > 
> > 
> 
> 



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