[hpsdr] Munin total current??

[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



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