tag:blogger.com,1999:blog-7590176649168185428.post5231797523711282026..comments2024-03-28T18:51:21.655-04:00Comments on SolderSmoke Daily News: PY2OHH's New Super-Minimalist (11 Component!) QRPp TransceiverBill Mearahttp://www.blogger.com/profile/07662500663603350847noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7590176649168185428.post-44830445522554303562022-11-22T18:29:59.150-05:002022-11-22T18:29:59.150-05:00A little older article... but I just rebuilt my ol...A little older article... but I just rebuilt my older versions I made last year. With a simplified bandpass filter ( a PI filter with series capacitors both on input and output )... I finally got rid of the annoying AM broadcast band interferences. I removed the 1N4148 from the audio output and the audio is a lot stronger. The clicking sound doesn't seem to be much diferent with or with ought them. The power output was initially around 1W, but the transistor was heating up quite a lot ( 2N2222 ), so I reduced the output capacitor from 470pF that I was using to 330pF. Now I still get 550mW of power. The only thing I'm not so sure about working right is the frequency offset, as it doesn't seem to be as I would like it to be. 73... great little TRX. Ciprian Popica - YO6DXEhttps://dxexplorer.comnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-59137783848339033042014-04-13T15:34:49.418-04:002014-04-13T15:34:49.418-04:00Not sure if you read the older blog comments but j...Not sure if you read the older blog comments but just letting you know the RX works now too. I was just a little confused as to what I was seeing and I had to use an amplified speaker. I emailed Miguel and he agreed that the audio is a little weak (and he uses an ~500 ohm impedance telephone earpiece for his, which I don't have). I've been updating my blog with the evolution of the little circuit and put a demo of it on YouTube as well.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-56504999463846446442014-04-11T18:19:53.693-04:002014-04-11T18:19:53.693-04:00Bill, I actually just built and tested this circui...Bill, I actually just built and tested this circuit. The TX gave me about 1/4 watt and the RX didn't work at all for me. Not sure what's wrong.<br /><br />I posted what I did on my blog if you're curious:<br />http://wf7ihomebrew.wordpress.com/2014/04/11/py2ohhs-pititico-and-14-watt-but-no-rx/Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-90853403168203919612014-04-10T19:09:53.907-04:002014-04-10T19:09:53.907-04:00Egad! No output filter?! But then I guess it wou...Egad! No output filter?! But then I guess it would no longer be "Super" and only a plain "Minimalist".<br /><br />Like Peter VK3YE, I am somewhat askance at the 700 mW claim. Be that as it may, Paulo certainly has a fab. web site for ham HB.<br /><br />73.......Steve Smith WB6TNL<br />"Snort Rosin"Steve "Snort Rosin" Smith WB6TNLhttps://www.blogger.com/profile/01570621886789949035noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-48788182064378566482014-04-10T13:56:27.158-04:002014-04-10T13:56:27.158-04:00Nice! Now I feel compelled to build this.
Here&#...Nice! Now I feel compelled to build this.<br /><br />Here's another ultra simple circuit I ran across on YouTube the other day (from Make magazine I believe). Super simple FM transmitter: https://www.youtube.com/watch?v=MMgzUGBfXiE&list=FL2K8XCApwENL4mlwOAyE9gA&feature=mh_lolz BertTheRunnerhttps://www.blogger.com/profile/02729382063490800247noreply@blogger.com