600Hz One Transistor CW Audio Filter - Active CW Audio Bandpass Filter
ฝัง
- เผยแพร่เมื่อ 2 ส.ค. 2024
- Get $5 of NEW USER FREE CREDIT using PCBWay. Full feature custom PCB prototype services, PCB assembly, SMD stencils and CNC / 3D Printing: pcbway.com/g/gSv3JS
Read more about the UV printing technology offered by PCBWay:
www.pcbway.com/blog/News/Unlo...
Join the official PCBWay Discord channel:
/ discord
As simple as you can get. One transistor active audio bandpass filter for CW. Use it as it is, or you can try to experiment and use two filters together for a much sharper result. I like it as it is, so I will use the schematic from the video. The center frequency is about 600Hz.
In the video describing the schematic, I meant NPN transistor not PNP. Also in the schematic the top capacitor is connected wrong. It should connect to the junction between the 10K and 220K resistors, not to the 220K resistor as it is in the schematic from the video. This is how you draw when you are filming videos at 6AM ( ha ). Sorry for the mistake, I will correct it in the blog article.
Thanks Ian and Hendrik for letting me now.
73, YO6DXE.
*** BLOG POST:
dxexplorer.com/ ( coming soon )
*** SUPPORT DX EXPLORER:
www.paypal.com/donate/?hosted...
*** Check the DISCOUNTS page on the blog:
Discount codes for various products and services offered by partners and collaborators.
dxexplorer.com/discount-codes - วิทยาศาสตร์และเทคโนโลยี
In the video describing the schematic, I meant NPN transistor not PNP. Also in the schematic the top capacitor is connected wrong. It should connect to the junction between the 10K and 220K resistors, not to the 220K resistor as it is in the schematic from the video. I was in a rush to film the video as I must get back to work 😄. Note to self... do not film videos at 6AM 😂. Thanks so much Ian and Hendrik for letting me know. 73, YO6DXE
P.S. You beginner ? 😁
You've had a hair cut! Well done 😊
Thanks Nigel. Ohh yes finally hahaha. I had no time and I felt like a pirate with that hair lately 🤣. I kept thinking about you lately... this week is the Easter week here in Romania so I will finally have free time. We must catch up on the radio shows. I hope you are doing good. We talk soon. 73 my friend.
Very nice and simple single transistor filter and without a coil 😁
Yes hehehe. That is why I love it. By the way... there is a mistake in the schematic.... the result of filming at 6am. The top capacitor does not connect to the 220K resistor... but to the junction between the 10K resistor with the 220K resistor. 73, YO6DXE.
@@dxexplorer yeh noticing now ;)
@Chems7308 😁🤣🙏
Very good. I like this cw filter, I might use it in few schematics (I love how simple it is😁). you are great guy. good luck 🍀. 4l1lat 73!.
Simple is what I also like 😄😄. Should me my nickname 🤣. Sounds really great for how simple it is. 73, YO6DXE ( P.S. The top capacitor in the schematic I had it wrong. It connects to the junction between the 10K and 220K resistors not just to the 220K resistor as it is in the schematic from the video. Filming at 6AM may not be so smart I guess 🤣 ).
@@dxexplorer at 6 in the morning I even don't know my name 🤣 if you accidentally made mistake it nothing 🤣🤣🤣🤣
@4L1LAT Yes but I wanted to let you know now... so you don't wonder later why the filter doesn't work 🤣🤣.
@@dxexplorer 🤣🤣. ok thanks in advance. good luck and 73!. good luck.
@4L1LAT 73 my friend and have fun with the filter. I can't wait to finish the receiver now 😁😁
Hi Chip, nice little filter, I may have to use it in a project. I think there is a small error in your circuit. The top capacitor should connect to the junction of the 10k and 220k resistors. As it stands the capacitors are just connected in parallel and there would be no filtering. Take care, 73, VK7IAN
Yes.. my friend Henrik just messaged me on Whassapp to tell me the same thing. I filmed at 6AM no wonder I draw badly 🤣. I will correct it in the blog article. Thanks for letting me know Ian. I just noticed now. 73, YO6DXE
A very useful video and thanks for the detailed explanation, I'm a beginner and it helped a lot. 73, Ace G0ACE
There is a mistake in the schematic.... the result of filming at 6am. The top capacitor does not connect to the 220K resistor... but to the junction between the 10K resistor with the 220K resistor. I will put the good schematic on the blog article soon. Glad you like it. I love how simple it is. 73, YO6DXE
@@dxexplorer Ah those early mornings! Thanks for the correction.
Way too many lately 😁... but this week I will simply stop and take a vacation... first one in four years. Is about time 😁.
@@dxexplorer Enjoy!
@acestudioscouk-Ace-G0ACE Thank you so so much 🙏🙏🙏