Very nice looking xtal set. I like that the toggle switches weren't brought out to the front of the set like is usually done; rather they're installed into the circuit layout. Very cool!
nice test! just indicate distance from now on? I have read 15 miles also 24.1KM approximately. and a schematic (from your Crystal RX) would also have been nice, I think
The BFO signal is feed into the coil on the far left. The middle coil is connected to the antenna. The big coil all the way on the right is the tuning/tank coil connected to the variable condenser. The diode is tapped into the tank coil at 20 turns. The tuning condenser goes through the switch labeled "Band Shift" and the two position of that switch go to the taps at 60 and 80 turns. The tank coil has a total of 100 turns (the 100th turn tap isn't used). Flipping the switch on the right up (labeled 160m/broadcast) puts a small trimmer cap in series with the main tuning condenser to lower the capacitance and tune the 160m band.
@@k9yk Thanks. The design looks to be a good one. I just had a somewhat clever idea for a project I will never do. I presume you know what a "stolen power radio" is but I will explain for others who may read these comments. Basically you need two crystal radios and a strong station you don't want to listen to. You tune one crystal radio to the strong station and put a large capacitor on its output. The voltage from the capacitor can be used as the power supply to run an amplifier connected to the other crystal radio. This lets you get a louder signal from a weak station you do want to hear. Now for the project idea. I wonder if I could make a BFO that takes so little power that it could be run from stolen power.
There’s no ‘toggle’ to select upper or lower sideband. If you tune the BFO below the SSB signal, then you are receiving upper sideband. Tune the BFO above the SSB signal and you are receiving lower sideband.
You must have missed reading the description and seeing the HP8924C at the end of the video that is generating the BFO frequency. Also there’s the third winding on the coil form which is where the BFO is being injected.
Very nice looking xtal set. I like that the toggle switches weren't brought out to the front of the set like is usually done; rather they're installed into the circuit layout. Very cool!
Takes me back to my childhood!
Beautiful work
nice test!
just indicate distance from now on?
I have read 15 miles also 24.1KM approximately.
and a schematic (from your Crystal RX) would also have been nice, I think
I'd like to see the xtal set schematic too (very nice layout!)
Neat. I need to make a crystal radio
Una Maravila de Radio 73
This is cool! How far is W9YG?
He is approximately 15 miles away from me. My other 2 videos show reception from much farther away.
Hi! You did a nice work. I have a small question. How much power does analyzer give the crystal radio as BFO😊
@@WasyaSokoly Looks like I had the BFO signal from the analyzer set at -34dBm. I probably could have been set lower than that.
@@k9yk thx i will use my xiegu X6100 HF radio with 60db attenuator to transmit BFO
Sweet rig kg6mn
It looks like you could use a tap selecting rotary switch.
Where is the BFO brought in?
The BFO signal is feed into the coil on the far left. The middle coil is connected to the antenna. The big coil all the way on the right is the tuning/tank coil connected to the variable condenser. The diode is tapped into the tank coil at 20 turns. The tuning condenser goes through the switch labeled "Band Shift" and the two position of that switch go to the taps at 60 and 80 turns. The tank coil has a total of 100 turns (the 100th turn tap isn't used). Flipping the switch on the right up (labeled 160m/broadcast) puts a small trimmer cap in series with the main tuning condenser to lower the capacitance and tune the 160m band.
@@k9yk Thanks. The design looks to be a good one. I just had a somewhat clever idea for a project I will never do.
I presume you know what a "stolen power radio" is but I will explain for others who may read these comments.
Basically you need two crystal radios and a strong station you don't want to listen to.
You tune one crystal radio to the strong station and put a large capacitor on its output.
The voltage from the capacitor can be used as the power supply to run an amplifier connected to the other crystal radio. This lets you get a louder signal from a weak station you do want to hear.
Now for the project idea. I wonder if I could make a BFO that takes so little power that it could be run from stolen power.
👍 how does the USB/LSB toggle work. I bite it’s set to USB on 160M here.
There’s no ‘toggle’ to select upper or lower sideband. If you tune the BFO below the SSB signal, then you are receiving upper sideband. Tune the BFO above the SSB signal and you are receiving lower sideband.
I'm having trouble believing this. You'd need oscillators to demod SSB. Nice try though.
You must have missed reading the description and seeing the HP8924C at the end of the video that is generating the BFO frequency. Also there’s the third winding on the coil form which is where the BFO is being injected.