[hpsdr] Munin total current??

[Georg Prinz]

Hi John,

as far as I can remember, it went up when munin didn't see a 50 Ohm
load.

73, Georg



Am Mittwoch, den 29.01.2014, 08:34 -0600 schrieb John:
> Hi George,
> 
> I used a signal generator to drive my Munin.  The output of Munin was 
> fed to a 30 dB attenuator and the voltage was measured with a Boonton 
> 91C millivoltmeter.  Total current to Munin was indirectly measured 
> using a 100mA/10 A current shunt and an old Fairchild 7000 
> DVM.  Unfortunately, I do not know the accuracy of my test equipment.
> 
> The total current to Munin was measured at 50, 60, 70, and 80 Watts 
> output.   This was done for the amateur bands at 100 kHz intervals, 
> up to 50.2 mHz.
> 
> The voltage at J3-1 was measured, but some of the readings did not 
> make sense on the higher frequencies.  Later, some checks were made 
> and it was discovered the was AC voltage on this line at higher power 
> levels.  This may or may not be RF voltage.  I measured it with an 
> HP-3400A (rated to only 10 mHz).  Changing the position of the wires 
> to J3 reduced it from 0.5 Volts to about 100 mV or so.
> 
> On six meters the total Munin current was measured to be a little 
> over 20 Amperes (for 80 Watts output measured on my test setup).
> 
> My Munin has the modification to C25, 26,and 27.
> 
> You mentioned your Munin went up to about 18 Amps when playing 
> around.  How were you able to reduce the current?
> 
> 73,
> 
> John,  WoGN
> 
> 
> At 05:34 AM 1/16/2014, Georg Prinz wrote:
> >Hi John,
> >
> >my Munin takes about 12A when in resonance. When playing around it went
> >up to more or less 18Amps.
> >
> >73, Georg, dl2kp
> >
> >
> >
> >
> >Am Donnerstag, den 16.01.2014, 04:46 -0600 schrieb John:
> > > ***** High Performance Software Defined Radio Discussion List *****
> > >
> > >
> > >
> > > What is the maximum current drawn by Munin?  I plan to use 13.6 VDC
> > > and want to add a meter on my Munin.
> > >
> > > 73,
> > >
> > > John,  WoGN
> 
> 



 1391030171.0