I have this circuit from college (almost 15 years ago) that is thru-hole components wired together and it picked up the strongest local radio station. I now can't get it to work, so I'm wondering if it's because it's tuned for a certain frequency and there is no radio station where I live now broadcasting at that frequency or some other issue. I could have something incorrect on the external amplified speaker.

So here is my LTSpice model of what I believe I have. The way this circuit worked is you would hold onto the wires of the antenna section and the person holding it would become the antenna.

When I plot this as a bode plot I get a flat line, so I'm not sure if this the correct way to check for what the circuit is tuned to. Any suggestions on how to check?

I've ordered a TinySA that has a signal generator on it, so I'm going to check and see if I can check that way too.

The amplifier I'm using is this one from amazon: https://www.amazon.com/gp/product/B0CQJPPS27/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&th=1

I've previously wired this circuit to a headphone jack so I have ground and the Vout connected to the L on the amplifier via line out cable. I've ensured the ground is connected from the circuit to the ground at the headphone jack on the amplifier and Vout is connected to the L on the amplifier. I put a speaker on it and can hear buzzing when I connect myself to the antenna. So I think it's working but I'm not sure. I recently fixed this headphone jack as I think I had ground connected to the R on the headphone jack, now I'm wondering if that was wrong from the get go or correct.

Another option I can check is driving back to college and checking it but who knows if the radio station that was in use back then is still in service today. Thus why I'd like to check with simulation if possible.

I have the potential to show this to some younger people to get them involved in electronics. Having the simulation working will help me understand this bit better (I was really bad with RF stuff in college). Plus if I need to tune the circuit for a local radio station will be helpful.

I have this circuit from college (almost 15 years ago) that is through-hole components wired together and it picked up the strongest local radio station. I now can't get it to work, so I'm wondering if it's because it's tuned for a certain frequency and there is no radio station where I live now broadcasting at that frequency or some other issue. I could have something incorrect on the external amplified speaker.

So here is my LTspice model of what I believe I have. The way this circuit worked is you would hold onto the wires of the antenna section and the person holding it would become the antenna.

When I plot this as a bode plot I get a flat line, so I'm not sure if this the correct way to check for what the circuit is tuned to. Any suggestions on how to check?

I've ordered a TinySA that has a signal generator on it, so I'm going to check and see if I can check that way too.

The amplifier I'm using is this one from Amazon.

I've previously wired this circuit to a headphone jack so I have ground and the Vout connected to the L on the amplifier via line out cable. I've ensured the ground is connected from the circuit to the ground at the headphone jack on the amplifier and Vout is connected to the L on the amplifier. I put a speaker on it and can hear buzzing when I connect myself to the antenna, so I think it's working, but I'm not sure.

I recently fixed this headphone jack as I think I had ground connected to the R on the headphone jack, but now I'm wondering if that was wrong from the get go or correct.

Another option I can check is driving back to college and checking it, but who knows if the radio station that was in use back then is still in service today, so I'd like to check with simulation if possible.

I have the potential to show this to some younger people to get them involved in electronics. Having the simulation working will help me understand this bit better (I was really bad with RF stuff in college), plus if I need to tune the circuit for a local radio station it will be helpful.

I have this circuit from college (almost 15 years ago) that is thru-hole components wired together and it picked up the strongest local radio station. I now can't get it to work, so I'm wondering if it's because it's tuned for a certain frequency and there is no radio station where I live now broadcasting at that frequency or some other issue. I could have something incorrect on the external amplified speaker.

So here is my LTSpice model of what I believe I have. The way this circuit worked is you would hold onto the wires of the antenna section and the person holding it would become the antenna.

When I plot this as a bode plot I get a flat line, so I'm not sure if this the correct way to check for what the circuit is tuned to. Any suggestions on how to check?

I've ordered a TinySA that has a signal generator on it, so I'm going to check and see if I can check that way too.

The amplifier I'm using is this one from amazon: https://www.amazon.com/gp/product/B0CQJPPS27/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&th=1

I've previously wired this circuit to a headphone jack so I have ground and the Vout connected to the L on the amplifier via line out cable. I've ensured the ground is connected from the circuit to the ground at the headphone jack on the amplifier and Vout is connected to the L on the amplifier. I put a speaker on it and can hear buzzing when I connect myself to the antenna. So I think it's working but I'm not sure. I recently fixed this headphone jack as I think I had ground connected to the R on the headphone jack, now I'm wondering if that was wrong from the get go or correct.

Another option I can check is driving back to college and checking it but who knows if the radio station that was in use back then is still in service today. Thus why I'd like to check with simulation if possible.

I have the potential to show this to some younger people to get them involved in electronics. Having the simulation working will help me understand this bit better (I was really bad with RF stuff in college). Plus if I need to tune the circuit for a local radio station will be helpful.

Thanks

I have this circuit from college (almost 15 years ago) that is thru-hole components wired together and it picked up the strongest local radio station. I now can't get it to work, so I'm wondering if it's because it's tuned for a certain frequency and there is no radio station where I live now broadcasting at that frequency or some other issue. I could have something incorrect on the external amplified speaker.

So here is my LTSpice model of what I believe I have. The way this circuit worked is you would hold onto the wires of the antenna section and the person holding it would become the antenna.

When I plot this as a bode plot I get a flat line, so I'm not sure if this the correct way to check for what the circuit is tuned to. Any suggestions on how to check?

I've ordered a TinySA that has a signal generator on it, so I'm going to check and see if I can check that way too.

The amplifier I'm using is this one from amazon: https://www.amazon.com/gp/product/B0CQJPPS27/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&th=1

I've previously wired this circuit to a headphone jack so I have ground and the Vout connected to the L on the amplifier via line out cable. I've ensured the ground is connected from the circuit to the ground at the headphone jack on the amplifier and Vout is connected to the L on the amplifier. I put a speaker on it and can hear buzzing when I connect myself to the antenna. So I think it's working but I'm not sure. I recently fixed this headphone jack as I think I had ground connected to the R on the headphone jack, now I'm wondering if that was wrong from the get go or correct.

Another option I can check is driving back to college and checking it but who knows if the radio station that was in use back then is still in service today. Thus why I'd like to check with simulation if possible.

I have the potential to show this to some younger people to get them involved in electronics. Having the simulation working will help me understand this bit better (I was really bad with RF stuff in college). Plus if I need to tune the circuit for a local radio station will be helpful.