  We study the angular power spectra of polarized Galactic synchrotron in the
range 10<l<800, at several frequencies between 0.4 and 2.7 GHz and at several
Galactic latitudes up to near the North Galactic Pole. Electric- and
magnetic-parity polarization spectra are found to have slopes around alpha
_{E,B} = 1.4 - 1.5 in the Parkes and Effelsberg Galactic-Plane surveys, but
strong local fluctuations of alpha_{E,B} are found at | b | ~ 10 degree from
the 1.4 GHz Effelsberg survey. The C_{PIl} spectrum, which is insensitive to
the polarization direction, is somewhat steeper, being alpha_{PI} = 1.6 - 1.8
for the same surveys. The low-resolution multifrequency survey of Brouw and
Spoelstra (1976) shows some flattening of the spectra below 1 GHz, more intense
for C_{E,Bl} than for C_{PIl}. In no case we find evidence for really steep
spectra. The extrapolation to the cosmological window shows that at 90 GHz the
detection of E-mode harmonics in the cosmic background radiation should not be
disturbed by synchrotron, even around l~10 for a reionization optical depth tau
_{ri}>~0.05.
