diff --git a/transmit.py b/transmit.py
index daceae22..d80c871e 100644
--- a/transmit.py
+++ b/transmit.py
@@ -288,8 +288,9 @@ def start_repeater(tx_doppler_freq_hz):
 	global txLed
 	print("Starting repeater")
 	output(txLed, 1)
-	txr = "{:.6f}".format(tx_doppler_freq_hz/1e6)
-	system("sudo nc -l 8011 | csdr convert_i16_f | csdr gain_ff 4000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f " + txr + "e3 > /dev/null 2>&1 &")
+	txr = "{:.3f}".format(tx_doppler_freq_hz/1e3)
+	print(txr)
+	system("sudo nc -l 8011 | csdr convert_i16_f | csdr gain_ff 4000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f " + txr + " > /dev/null 2>&1 &")
 	sleep(0.5)
 	system("sudo arecord -D shared_mic -r48000 -fS16_LE -c1 | nc localhost 8011 &")