More "Fairy Tales"
I did connect the Tx this morning and ran some multimeters on that. 21,5ish in on the first C and everything behaved except for the 250 mA SB AC fuse that blew so I upgraded to a 500 mA.
So it was time to hook the PicoScope 4262 audio range scope up.
Since it is a dedicated low voltage +/- 20 v audio range scope I made an arrangement with a 3K9 and a red diode and measured over the resistor to safely be under 20 volts.
I didnt bother soldering negative, figures will be the sameish. Probe A is on first C, ie before the 1 ohm carbon film resistor and Probe B is on second C after the resistor.
It is very comfy for a regulator not having to bother with sharp peaks like in this A channel sawtooth of 131 mV RMS on the first 3900 uF. Much nicer for it with an 18,6 mV sisusodial on the second 10 000 uF.
This is a very sensitive scope and it measures the ripple out on both positive and negative reg to under 5 uV.
Now I have baselines for connecting the x-over app and see how it behaves.
I did connect the Tx this morning and ran some multimeters on that. 21,5ish in on the first C and everything behaved except for the 250 mA SB AC fuse that blew so I upgraded to a 500 mA.
So it was time to hook the PicoScope 4262 audio range scope up.
Since it is a dedicated low voltage +/- 20 v audio range scope I made an arrangement with a 3K9 and a red diode and measured over the resistor to safely be under 20 volts.
I didnt bother soldering negative, figures will be the sameish. Probe A is on first C, ie before the 1 ohm carbon film resistor and Probe B is on second C after the resistor.
It is very comfy for a regulator not having to bother with sharp peaks like in this A channel sawtooth of 131 mV RMS on the first 3900 uF. Much nicer for it with an 18,6 mV sisusodial on the second 10 000 uF.
This is a very sensitive scope and it measures the ripple out on both positive and negative reg to under 5 uV.
Now I have baselines for connecting the x-over app and see how it behaves.
Hi, the specs of 1.1 BiB are:
ACV input range: 6.3-36V power transformer
DCV output range: 5-45V with Mosfet, 2.5-45V with BJT output
Mics using phantom power fortunately accept a wider DCV range in most cases, not strictly 48V. In such a case you can use the 1.1 BiB shunt reg.