Hi,

I have built two mixers for a direct conversion receiver. One of them
a single transistor mixer, the other one is a single balanced diode
mixer. I already have AF amplifier and LO stages. I think both are
working fine seperately, but i can't hear anything when i connect the
LO and the amplifier to the mixers(either of them of course). Is there
any way that i can test these two mixers without test equipment like
an oscilloscope or a signal generator? I also don't have a RF probe
right now, only a multimeter. Actually i have another questions with
this receiver, too, but this is where i am stuck at the moment.

(LO is a crystal controlled one. I built a VFO, too, but didn't manage
to get it working, for now. )

Thanks in advance...