| Topic |
Author |
Posted On |
| Looking for others; Quan basic radio building |
KE2PB |
on 4/2/23 |
| I just looked at a review. That is a great book, although I do not want to spend the money and already know most of the concepts there. For AM work I have had much fun with the TA7642, which can work up into the short wave bands and support a nice direct conversion receiver. I am designing and building out a TDA7012 fm radio for a childrens build it project and can send you my results including circuit board files if you are interested. |
| Selecting Proper Transistors for IF Amps |
WB5EMX |
on 4/2/23 |
RF transistors have evolved forward from the old 2n5109 that was developed for CATV amplifiers. NXP has a series of best transistors with much lower noise and higher frequency response and gain. I prefer their BUF520 for all receiver amplifier applications such as pre amp and if amp. see https://www.nxp.com/docs/en/data-sheet/BFU520XR.pdf
If you want more specifics I contact me and I will send a schematic or gerber file for printing a circuit board. AK4VO |
