In this video, I take a look at a project on Rod Elliott's Sound Products website which is an experimental operational amplifier in discrete form. The project can be found here: https://sound-au.com/project07.htm Become a Patreon supporter to help the channel continue to grow: https://www.patreon.com/user?u=28358231 Follow me on Facebook: https://www.facebook.com/TheAstro30/ Support the channel by donating: https://paypal.me/TheAstro30 ... https://www.youtube.com/watch?v=xMmjOU9jRYw

Originally designed by Darren Yates of Silicon Chip magazine back in the mid '90's, I join the current "pre-champ" kit available from Jaycar Electronics to the original "Champ" transistor amplifier. The above mentioned kit is the pre-amp to an LM386 (I'm not a great fan of that IC). So, sit back, grab your favorite beverage and enjoy this video. I will say as a side note that the reason the re-routed PCB's version (that I made) of the pre-amp doesn't perform the same as the kit's is most likely the choice for the type of capacitor for the 0.0015uF. I believe I used a ceramic disc 0.0015uF (152) which is the wrong type to use. Ceramics should used in RF circuits, not audio. Link to original "pre-champ" kit: https://www.jaycar.com.au/pre-champ-versatile-preamplifier-kit/p/KC5166 Become a Patreon supporter to help the channel continue to grow: https://www.patreon.com/user?u=28358231 Follow me on Facebook: https://www.facebook.com/TheAstro30/ Support the channel by donating: https://paypal.me/TheAstro30 ... https://www.youtube.com/watch?v=lBEOjzGmqr8

In this video, I construct an NTE1431 (BA306) IC that is obscure and was used in the Science Fair's "160-in-one" Electronics Project Kit. Fun little experiment. Doesn't work as well as I remember it did. It could be because of the choice of transistors (ie: hFe may be too low, resistors need adjusting, etc.). Note: Ignore my banter about the BC546 pinout. I was actually wrong, it's always been C B E. I was confusing it with the 2N3904/6 which is E B C. It's been a while since I've done anything design wise with transistors, so, I'm rusty! Lol. Enjoy! Link to website containing more information on the kit: https://medium.com/@rxseger/electronic-project-kits-hands-on-with-a-vintage-160-in-1-eea39e6193f4 If anyone wants a copy of the manual, it's avalaible on my Patreon: https://www.patreon.com/posts/science-fair-160-79724417?utm_medium=clipboard_copy&utm_source=copyLink&utm_campaign=postshare_creator&utm_content=join_link Become a Patreon supporter to help the channel continue to grow: https://www.patreon.com/astroselectronicslab Follow me on Facebook: https://www.facebook.com/TheAstro30/ Support the channel by donating: https://paypal.me/TheAstro30 Backup channel: https://lbry.tv/@TheAstro30:a ... https://www.youtube.com/watch?v=44a01ao-NuQ

Some things just don't want to be fixed, and this Kenwood modular thing is no different. You need to know when to call it, and I called it. Become a Patreon supporter to help the channel continue to grow: https://www.patreon.com/astroselectronicslab Follow me on Facebook: https://www.facebook.com/TheAstro30/ Support the channel by donating: https://paypal.me/TheAstro30 Backup channel: https://lbry.tv/@TheAstro30:a ... https://www.youtube.com/watch?v=xXFidHHmNSE