http://groups.yahoo.com/group/r2pro/ R2Pro /KK7B Designs Fri, 03 Jul 2009 03:46:04 GMT gt25psi2002 http://groups.yahoo.com/group/r2pro/message/619 http://groups.yahoo.com/group/r2pro/message/619 Dear Rick, After reading the whole Chapter 9 of EMRFD, it seems that the design of R2Pro downstream of the mixers is already perfect. I dare not touch anything Wed, 01 Jul 2009 03:19:32 GMT Rick http://groups.yahoo.com/group/r2pro/message/618 http://groups.yahoo.com/group/r2pro/message/618 In most of my designs, I use some kind of splitter at the RF ports. The microR2 was an experiment in simplicity, so I tried the simplest possible Wed, 01 Jul 2009 00:55:54 GMT la3pna http://groups.yahoo.com/group/r2pro/message/617 http://groups.yahoo.com/group/r2pro/message/617 Hello. I'm trying to build an transceiver for 2M with micro R2 and micro T2. The RF inputs on the mixers are just conected together on the shematics. Is there Mon, 29 Jun 2009 22:06:24 GMT n8ewy http://groups.yahoo.com/group/r2pro/message/616 http://groups.yahoo.com/group/r2pro/message/616 I got my new R2Pro today. It is in a large manila envelope with a simple florescent Pink sticker with R2Pro Receiver on it. It is just as it was in 2002. Mon, 29 Jun 2009 16:05:45 GMT JT Croteau http://groups.yahoo.com/group/r2pro/message/615 http://groups.yahoo.com/group/r2pro/message/615 R2Pro and R1 items have been spoken for, my extra copy of EMRFD is still available. Thanks for all the interest so far. -- JT Croteau, N1ESE Mon, 29 Jun 2009 15:49:14 GMT JT Croteau http://groups.yahoo.com/group/r2pro/message/614 http://groups.yahoo.com/group/r2pro/message/614 I have the following for sale: 1 x Experimental Methods in RF Design Book with CD - First Edition, 2nd Printing - Price: $30.00 1 x Set of R2Pro Receiver bare Fri, 26 Jun 2009 17:30:55 GMT cwfingertalker http://groups.yahoo.com/group/r2pro/message/613 http://groups.yahoo.com/group/r2pro/message/613 JT Your pictures are great. You will not be disappointed in the receiver. I am always amazed with the opposite sideband rejection in this uR2. The only time Fri, 26 Jun 2009 10:58:27 GMT Bill Kelsey http://groups.yahoo.com/group/r2pro/message/612 http://groups.yahoo.com/group/r2pro/message/612 I would say it looks pretty good now. Keep building! ;>) I am headed out for the weekend. I'll check in again late sunday and see how you are doing. 73 - Fri, 26 Jun 2009 09:19:16 GMT JT Croteau http://groups.yahoo.com/group/r2pro/message/611 http://groups.yahoo.com/group/r2pro/message/611 Well, I finally have a clean reading on my scope of the uR2 VFO stage. However, after a minute or two, it becomes fuzzy again. I'm going to pickup a 12V Fri, 26 Jun 2009 03:03:04 GMT Bill Kelsey http://groups.yahoo.com/group/r2pro/message/610 http://groups.yahoo.com/group/r2pro/message/610 Try a 12v battery supply and see if that cleans it up. Also - take a look at the DC output of the Power SUpply with the scope - I bet you will see that "fuzz" Fri, 26 Jun 2009 02:03:50 GMT JT Croteau http://groups.yahoo.com/group/r2pro/message/609 http://groups.yahoo.com/group/r2pro/message/609 ... Funny you should mention that because I was just thinking my PS is faulty as I am experiencing some oddities the more I experiment with this. I am using Fri, 26 Jun 2009 01:57:29 GMT Bill Kelsey http://groups.yahoo.com/group/r2pro/message/608 http://groups.yahoo.com/group/r2pro/message/608 Interesting. What are you using as a power source for the vfo? Fri, 26 Jun 2009 01:54:01 GMT JT Croteau http://groups.yahoo.com/group/r2pro/message/607 http://groups.yahoo.com/group/r2pro/message/607 ... Looking better now but still not super clean. http://tobit.hlrse.net/images/scope2.jpg -- JT Croteau, N1ESE Fri, 26 Jun 2009 01:37:13 GMT Bill Kelsey http://groups.yahoo.com/group/r2pro/message/606 http://groups.yahoo.com/group/r2pro/message/606 On the far right - change the "Mode" from "Auto Level" to "Norm". Then you will have to vary the "Level" control at the top right to stabilize the trace. Fri, 26 Jun 2009 01:22:38 GMT JT Croteau http://groups.yahoo.com/group/r2pro/message/605 http://groups.yahoo.com/group/r2pro/message/605 ... Here we go: http://tobit.hlrse.net/images/scope.jpg Thanks Bill -- JT Croteau, N1ESE