Troubleshooting
The easy RX is designed to be a simple kit to build and to use. However, occasionally, problems may happen. In
our experience, these are often soldering issues (shorts or cold solder joints) or component misplacement Here
are a few things to check if the kit does not function as it should.
1. Verify component placement, including resistors and capacitors
2. Inspect all solder joints with a magnifying glass, looking particularly for any that may have small whisker shorts
or which look dull and blotchy indicating a cold solder joint.
2. Verify orientation of the two ICs in their sockets. One end of the sockets will have a notch and that should be on
the same end as the notch in the IC package as well as a dot or other marking for pin 1 of the IC. See the photo on
page 3 and diagram on page 7 for examples of proper orientation.
3. Check for correct DC voltages to ground at the following points in the circuit:
-Right side of JP2- should be equal to power supply voltages
-Band end of D3- should be equal to power supply minus approximately 0.7V
-Pins 8 of IC1- should be approximately 6.2V
Pin 6 of IC2 -should be equal to power supply minus approximately 0.7V
If the Easy RX only makes a low level HISS in the speaker or headphones, check the local oscillator operation by
placing it near another receiver and listening for the Easy RX local Oscillator. Tune C6 if needed to locate the
oscillator in the second Receivers pass band. If there is no oscillator signal then carefully check the circuit around
the IC1, NE602/612, to be sure the parts are correct and properly soldered.
If during tune up the local oscillator could be heard in the second RX but the Easy RX has no output from the
speaker/headphones then first touch the junction of R6/C16 the speaker should make a 60 HZ humming sound. If
this happens then check the parts and soldering around the volume control. If there is no HUM then check the
parts and soldering around IC2, LM386.
If the receiver is functioning and connected to a good antenna, you should be able to hear CW signals when tuning
across the band. You will note that each signal will appear twice as you tune. This is expected for a direct
conversion receiver as it will hear the signal on both sides of the center frequency.
As you tune up in frequency and hear a signal, you will hear the signal decrease in frequency, go through zero and
then increase in frequency again. Again, this is as expected for a DC receiver.
We hope you enjoy your Easy RX kit!
If you have any questions, or experience problems with your kit, please contact us at
we will be happy to assist you.
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EZRX 20170527
