capacitorpower electronics
I see on these two products, which have the same function (and obviously also the same construction; these are switches which allow activating/deactivating individually the power supplies of one or more hard disks in a computer), that some use "100 16V VT" capacitors and others use "100 16V RVT" capacitors:
I didn't find an explanation anywhere for the differences between the VT versus RVT markings.
Could you clarify the meaning of these two acronyms to me, and above all, their differences?
As I mentioned in the comment box " I hope they are inductors not capacitor, Even on the PC board Ref des is mentioned as L018 and L019 which represents an Inductor" The specific name for these inductors are Wide Band Chokes and bead some of them can be find Here
Below are the PIC for these kind of inductors
Datasheet for the above part can be find Here
If I look carefully at the photos of the HZ-1050 it appears to have at least one 3.3 nF capacitor already. Also I see that the antenna that is used does not have any capacitors. Maybe your antenna coil has a higher inductance than most antennas and it needs 2 3.3 nF caps in series. If you can try shorting one of the caps on the antenna and see if that helps. If not, try shorting both. You could also short the capacitor on the PCB but make sure there is at least one capacitor in series with the antenna coil at all times. It does not matter if the capacitor is on the PCB or in the antenna as long as there is a cap.
1) The caps make a series resonant circuit in combination with the antenna coil. It seems they needed 1.65 nF which is two 3.3nF in series.
2) There's also a cap on the board and now there are too many caps making the system oscillate at the wrong (too high probably) frequency.
3) see above
Best Answer
VT is used as a series moniker for (Chinese) unbranded and also for branded (Multicomp Pro) capacitors.
RVT is a series of capacitors made by Elna, but it is also the marking of a series of wide-temperature capacitors by Xuanx, and quite probably others.
Both VT and RVT are names of series of capacitors (capacitors with different values but similar specifications, usually made by a single manufacturer), but the actual meaning of the names and markings (and the specs of the capacitors) will vary from manufacturer to manufacturer.
The markings by themselves tell you little or nothing; they will only make sense when you know the manufacturer, so you can look up the appropriate datasheets.