raptor shift DD

[gallico58]

Hello
From the IMD book page 157par3 for construction DD raptor recommend nulling with phase shift tx-rx 20 °
Instead on page 149 always x build raptor DD recommend 200 degree offsets
I am confused help me to understand what phase i need to adopt x construct DD raptor?

thank you

[Qiaozhi]

Hello
From the IMD book page 157par3 for construction DD raptor recommend nulling with phase shift tx-rx 20 °
Instead on page 149 always x build raptor DD recommend 200 degree offsets
I am confused help me to understand what phase i need to adopt x construct DD raptor?

thank you

The page numbers you have quoted correspond to the PI chapters, not to the Raptor Project.

However, it is easy to note that 180° + 20° = 200°. As you can see from the waveforms shown in the figures, the receive signal may be inverted between different types of coils. In particular between concentric and DD.

[gallico58]

The page numbers you have quoted correspond to the PI chapters, not to the Raptor Project.

However, it is easy to note that 180° + 20° = 200°. As you can see from the waveforms shown in the figures, the receive signal may be inverted between different types of coils. In particular between concentric and DD.

Sorry Qiaozhi you're right, page 141 refers to 20 °, page 130 instead 200 ° always referenced to DD, which of the two do I have to do ?, I do not want to concentric for now.
Thanks and sorry x error

[Qiaozhi]

Sorry Qiaozhi you're right, page 141 refers to 20 °, page 130 instead 200 ° always referenced to DD, which of the two do I have to do ?, I do not want to concentric for now.
Thanks and sorry x error

Both 20° and 200° offsets will work with Raptor. Figure 10-4 shows 20° offset, and figure 9-18 shows 200°.
The Tesoro concentric coils have a 20° offset, and the DD coils have a 200°.
If you're making your own coil, then you can set it to either by simply reversing the RX loop connections. But make sure you do this before potting the coil, as Raptor (like Tesoro) requires the TX and RX loops to share a common connection that is wired to the shield in the coil housing.