That chip can be used as a balanced mixer if you inject into the AGC pin.

Thanks for the chip of the day. Even though some of the items featured at times may be old stock, and sometimes hard to get, I really learn a lot from these videos. Just wanted to say thanks.

I remember the MC1350, it was used in a lot of stuff back in the day. Heath Kit seemed to like it, remember it in a number of things I built from them.

I used a MC1350 as a RF amp in a TV decoder running on channel 3. I am also using it as a IF amplifier in a couple receivers.

Neat little chip.

Thanks for sharing!

I have one of these chips I got off a circuit board i scrounged on an oven that was being thrown away. I'll need to test it first before I consider it good to use.

This is one of my favorite parts for homebrew HF receivers. Too bad they have not been made in a long time. NOS parts are still around though but prices have gone up.

In my opinion redrawing the output transformer obscured matters. No phasing dots were shown on the two-winding transformer, which I think gives the impression that the phasing in both is the same (e.g. "dotted" ends of both go to V+). The original schematic clearly shows a centre-tapped transformer. The latter is critical to correct operation which in effect applies AC to the primary. If there were two windings with the same phasing this would not be the case.

I have a tube of about 35 of them in mu stash box. I have a signal generator circuit that can AM modulate by putting sine wave into the AGC port.

Getting rare these days, useful little chip though, used in a lot of homebrew ham projects

The output stage is a nice counterpart of a push-pull tube amp, haha! None of that DC saturation or common mode interference rubbish.

Isn't the front end a Gilbert multiplier configuration?

Thanks for a great video! Would you be opposed to the idea of doing a deep dive video (or series) into the transistor circuits shown in the circuit schematic for the MC1350?

I think the AGC range at 9/10.7 is about 85 dB compared to the spec at 45 MHz. The MC1349 is similar to the Mc1350.

Please do a video explaining return loss. If you do it i will understand it

very nice! Can you also do something with higher frequencies? say 100 to... 150MHz? Healthy and Friendly Greetings from the Netherlands! Rob

So many guys..

when i look at those ic schematics i just see a waste of transistors.

Interesting but all your hand waving and finger pointing was a bit difficult to follow. Maybe one day I'll understand.