Not sure what you mean by "the signal is amplified in the ring mixer"
Diode ring mixers are lossy.
If the ring mixer is just diodes and? trifilar toroids for the transformers as on the uBitx.
it's going to take a lot more than 200mV pk-pk from the local oscillator to work efficiently.
If you are using schottky diodes, something capable of enough power to deliver
a 1 V pk-pk square wave into 50 ohms.? If using 1n4148 diodes, perhaps double that.
Injection of 200 mV pk-pk would fully explain a very weak receiver.
Jerry, KE7ER
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On Tue, Mar 6, 2018 at 04:52 pm, <kaapstad1@...> wrote:
The AD9850 has an output of only 200 mV peak-peak around 17 MHz but the signal is amplified in the ring mixer.
