A method is developed to detect electron paramagnetic resonance (EPR) transient signals with frequency components in the range from dc to 1 MHz and a low initial signal‐to‐noise ratio (e.g., 0.1 after one sweep). This method uses 200‐kHz magnetic field modulation on a conventional EPR spectrometer, using a modified lock‐in detector: the tuned amplifier is replaced by a broadband preamplifier with a high‐pass filter and the low‐pass filter of the lock‐in detector is replaced by a broadband amplifier. The transients are generated incoherently from the magnetic field modulation, and subsequently averaged. The function of the (removed) low‐pass filter is taken over by the averaging. An instrumental response time of less than 1 &mgr;s is obtained. This was determined by measuring the rise time of the triplet state of the photosynthetic reaction center ofRhodopseudomonassphaeroidesR‐26 at 165 K. This method, direct detection, and high‐frequency (1–2 MHz) modulation are discussed. The S/N ratio of the method described in this paper is similar to that of the other two methods. However, when large linewidths (>0.5 mT) are met, it gives a superior S/N ratio as compared to high‐frequency (1–2 MHz) modulation methods, due to the higher maximum modulation amplitude. When the transients of interest contain frequency components in the low‐frequency noise regime (dc–50 kHz), the described method is to be preferred over direct detection because of its better S/N ratio.