[HomeBrew] Transformers as Inductors - Thanks

[Jim Miller]

OK, I guess I will leave it as is.  It seems I have not sufficiently
explained the hookup or the intent.  The amp runs directly off of the
batteries "(Just so you have the complete story - I have two 12 volt car
batteries in parallel and on a maintenance charger under the bench now that
are connected directly to the "battery buss bars" and then on to the
amplifier.)" and yes there are current spikes of 85 amps being drawn at the
amplifier and yes it does put out more than 500 watts so is not starving for
power and this without the power supply even turned on (the station running
totally from the batteries).  The wiring I speak of is the recharge line
during extended operation so the batteries do not run down.  (It is also
used for battery only operation)  The intent is to have the power supply (70
amp) somewhat isolated from the spikes so the radio equipment would not be
subjected to any of the voltage fluctuations that may be caused by them and
to not have the power supply have to try to regulate voltage sags caused by
current draw being modulated at a SSB rate.  The voltage drop of the wire is
exactly the reason it is there and the only current actually flowing in the
wire is the difference between the power supply voltage and the dip in the
battery voltage caused by the 85 amp peaks.  I could scope it but have not
done that yet, my guess is that it would be in the range of one volt.  One
volt through a .1 ohm resistor allows 10 amps of current flow.  This is not
a strain for 16 ga wire especially when you consider the duty cycle of SSB,
the wire does not get "warm" even in contesting.  The meter on the power
supply shows greatly reduced fluctuations from what is shown on the
amplifier but I do not know the reaction time of the amp meter in the power
supply.  At any rate, it seems like it is functioning as I intended.  I just
wanted to see if there was a more proper method of buffering the spikes.

Thanks everybody for your comments,

73, de Jim KG0KP