Re: [HamBrewers] 144 - 146 Mhz (2M) Rx thoughts

QSL Raj on the kiss mode.  I does make sense to have a VHF rx for 3-400 ohms. Bulk order of crystals. You could interest a lot of budding hams, who are on the waiting mode. 73,s Paddy vu2pep   --- On Wed, 6/1/11, Raj <vu2zap@gmail.com> wrote: From: Raj <vu2zap@gmail.com> Subject: [HamBrewers] 144 - 146 Mhz (2M) Rx thoughts To: HamBrewers@yahoogroups.com Date: Wednesday, June 1, 2011, 9:08 AM   For two meters I would suggest the obvious "kiss" mode. I will leave out the PLL/DDS part out of discussion for now. We have others who can suggest. One chip of the series MC3357, 3359 and so forth.. will do the major task of conversion, limiting & detection! These devices are designed for cordless phones and are for NBFM. Some thoughts: You have the front end built in the later chips. Others require the first mixer e.g. 3357 Some chips require a discriminator coil/cap and others resonator. 10.7 or 21.4 Mhz & first IF 455 second IF (first IF depends on your junk box xtals) Audio stage: No more LM386 please. It took many years to get out of the clutches of LM380! Now I suggest the TDA2822 stereo amp in push pull mode. I found this chip very stable and took a lot of abuse. I got a great sound in my RX project. Cheap! Hi, I am also interested in this project. I am also requesting VU2ZAP to give his thought in this regard.   with 73's de VU2GAQ Kumar Gautam Ex- VU3KGL -- Raj, VU2ZAP Bangalore, India.