DCF77 4510 PCB/Kit V4a
DCF77 Receiver PCB/Kit with A4510D/TCA4510 V4a
This receiver is a further development of version V3. Due to the discontinuation of the KP303E, it was replaced by a
different 2N3919/TO92 JFET. A 1M resistor was also added to the gate of Q1.
Q4 and Q2 were replaced with a lower-noise BC550C type.
Three versions are available to order.
PCB V4: Only the PCB is supplied.
3910 Kit V4a: All electronic components are supplied according to the parts list, including coil 3910. A4510D/TCA4510 is subject to availability.
3911 Kit V4a: All electronic components are supplied according to the parts list, including coil 3911. A4510D/TCA4510 is subject to availability.
We cannot guarantee that the receiver will provide optimal reception in every region/country.
We recommend the "DCF77 Active Adapter Kit" and the "DCF77 SHO ANT Kit" to improve reception.
DCF77-4510-V4a-3910.pdf ( Update 11.09.2025 )
DCF77-4510-V4a-3911.pdf ( Update 11.09.2025 )
DCF77-4510-V4a-3910-SST.pdf ( Update 11.09.2025 )
This receiver is a further development of version V3. Due to the discontinuation of the KP303E, it was replaced by a
different 2N3919/TO92 JFET. A 1M resistor was also added to the gate of Q1.
Q4 and Q2 were replaced with a lower-noise BC550C type.
Three versions are available to order.
PCB V4: Only the PCB is supplied.
3910 Kit V4a: All electronic components are supplied according to the parts list, including coil 3910. A4510D/TCA4510 is subject to availability.
3911 Kit V4a: All electronic components are supplied according to the parts list, including coil 3911. A4510D/TCA4510 is subject to availability.
We cannot guarantee that the receiver will provide optimal reception in every region/country.
We recommend the "DCF77 Active Adapter Kit" and the "DCF77 SHO ANT Kit" to improve reception.
DCF77-4510-V4a-3910.pdf ( Update 11.09.2025 ) DCF77-4510-V4a-3911.pdf ( Update 11.09.2025 ) DCF77-4510-V4a-3910-SST.pdf ( Update 11.09.2025 ) 
