Polarisation pulse profiles for known PSRs J0220+3626 (upper), J0742+4110 (middle), and J2212+2450 (lower), respectively, detected in the TULIPP survey. Each was obtained using 20-min observations at a centre frequency of 149 MHz with a 78 MHz bandwidth, and 256, 128, and 128 pulse profile bins, respectively. The normalised flux density (arbitrary units) is shown for total intensity (Stokes I, black lines), linear polarisation (L, red dashed lines), and circular polarisation (Stokes V, blue dotted lines). Polarisation position angles are not shown, because no linear polarisation was detected above 3 × rms of the off-pulse baseline.