Hello, I am using an audio 25A AC power surge protection and DC block audio filter on my phono preamp 24v AC and turntable which is also AC. While it improves both it does cause a little bit of sibilance or high frequency hisssssss on some records.
Main parts specifications:
Circuit board: double-sided FR4 105X48X1.6MM spray tin dosage 1PCS.
Bridge reactor: CBJ5010 50A 1000V 3 PCS.
Blanking capacitance: 16V2200UF diameter 13MM dosage 9PCS.
Varistor: 20D561K dosage 1PCS.
Thin film capacitance: 2.2UF MKT 250V dosage 1PCS.
Can I change the value of the caps or do something else to filter this out?
Main parts specifications:
Circuit board: double-sided FR4 105X48X1.6MM spray tin dosage 1PCS.
Bridge reactor: CBJ5010 50A 1000V 3 PCS.
Blanking capacitance: 16V2200UF diameter 13MM dosage 9PCS.
Varistor: 20D561K dosage 1PCS.
Thin film capacitance: 2.2UF MKT 250V dosage 1PCS.
Can I change the value of the caps or do something else to filter this out?
Not sure how could it cause sibilance or hiss, specially on "some" records only.
IF diodes were unbypassed, that could cause switching noise which can have very high order harmonics but that is not the case.
Just for peace of mind, bypass them using a plastic .1uF cap soldered straight across them, but again, only "not to leave any stone unturned"
IF diodes were unbypassed, that could cause switching noise which can have very high order harmonics but that is not the case.
Just for peace of mind, bypass them using a plastic .1uF cap soldered straight across them, but again, only "not to leave any stone unturned"
A strange dc blocking circuit.
3 diodes gives 2.1 volts drop yet a electrolytic capacitor will only reverse bias to about 1.5 volts.
Usually electrolytic caps are put back to back so they become bipolar.
3 diodes gives 2.1 volts drop yet a electrolytic capacitor will only reverse bias to about 1.5 volts.
Usually electrolytic caps are put back to back so they become bipolar.
Proper "bipolarizing" of regular electrolytics means putting them in series, with opposing polarities.
Putting them in parallel only guarantees trouble.
Not sure who designs and posts such horrors.
In this case, both are wrong.
Putting them in parallel only guarantees trouble.
Not sure who designs and posts such horrors.
In this case, both are wrong.
The first one will potential explode caps if there's enough DC too. Some awful circuits. Many of them will become liable to burst caps if one diode fails too...
Perhaps something more like this - no one diode failure will take this out and 85% of two diode failures will leave it working, and I've added LEDs so you can see whats going on too:
Perhaps something more like this - no one diode failure will take this out and 85% of two diode failures will leave it working, and I've added LEDs so you can see whats going on too:
It supposedly solves supposed toroid transformer problems 🙄
Fwiw robust toroids have been used for decades in Pro PA and large MI amplifiers without any problems, now in the Audiophile World they have suddenly become weak and unreliable, unable to be connected to Mains without getting their panties in a wad.
Fwiw robust toroids have been used for decades in Pro PA and large MI amplifiers without any problems, now in the Audiophile World they have suddenly become weak and unreliable, unable to be connected to Mains without getting their panties in a wad.
I made several toros for tube and SS devices with no priblems regarding DC AT THE PRIMARY of them
Some of the cheaper makes of toroids run the core at high flux density so any DC at the primary will could cause the transformer
to saturate. Some good makes size the core to allow for this but it makes them a little bit more expensive. Canterbury Windings
here in the UK used to have a low flux density option for their range of toroids at an extra cost of course.
to saturate. Some good makes size the core to allow for this but it makes them a little bit more expensive. Canterbury Windings
here in the UK used to have a low flux density option for their range of toroids at an extra cost of course.