tag:blogger.com,1999:blog-4901205574058136834.post4703645941045831538..comments2024-03-26T20:17:30.126-07:00Comments on Every Blade of Grass: SB-301 Rebuild Progress - Part 6 -drjimhttp://www.blogger.com/profile/05647484115197408897noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-4901205574058136834.post-89200012583964456102021-01-16T14:40:21.389-08:002021-01-16T14:40:21.389-08:00I pretty much consider ANY radio of this vintage a...I pretty much consider ANY radio of this vintage as "needing work", unless it was sold as a working radio.<br /><br />And even then, every single "working radio" I've bought on eBay has needing something.<br /><br />I guess it depends on what your criteria are for a "working radio"....drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-4901205574058136834.post-15214346061263621952021-01-16T14:07:14.809-08:002021-01-16T14:07:14.809-08:00Win some, lose some... and there is ALWAYS somethi...Win some, lose some... and there is ALWAYS something else... sighOld NFOhttps://www.blogger.com/profile/16404197287935017147noreply@blogger.comtag:blogger.com,1999:blog-4901205574058136834.post-34859283888177788922021-01-16T14:04:53.999-08:002021-01-16T14:04:53.999-08:00Glad you're enjoying it, Bob!
For the most pa...Glad you're enjoying it, Bob!<br /><br />For the most part, the soldering and assembly were pretty good on the RX and TX. The PC boards look great, but some of the point-to-point wiring was pretty iffy. Found several solder joints that were borderline cold joints, and the fact the original builder just stuck the leads through the terminals and soldered them instead of doing the "180* bend" around the terminals is pretty annoying.drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-4901205574058136834.post-63923789476799172002021-01-16T13:33:48.322-08:002021-01-16T13:33:48.322-08:00Yeah, the longest length in there is like .01 lamb...Yeah, the longest length in there is like .01 lambda @30MHz!<br /><br />Not hardly worth worrying about.<br /><br />I prefer the Teflon because it doesn't melt when you solder to it. I remember back in 1964 when I was building mine that I had trouble soldering to the mini-coax, and I had to buy a small 'pencil' type iron to do it, as the larger iron I had took an incredibly light touch to solder to the 188 without melting it.<br /><br />These days I'd just put a smaller tip in my soldering station and dial down the temp, but things like that were a dream back then.drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-4901205574058136834.post-37975691714990846272021-01-16T09:39:26.428-08:002021-01-16T09:39:26.428-08:00I am certainly enjoying, although vicariously, the...I am certainly enjoying, although vicariously, the resuscitation of your venerable old SB 301. The pictures are great and your descriptions take me back to my old days of fixing broke stuff or troubleshooting and fixing some of the homebrew stuff in those days.CapnBobhttps://www.blogger.com/profile/13179687896011182116noreply@blogger.comtag:blogger.com,1999:blog-4901205574058136834.post-21504447271963653562021-01-16T08:03:54.068-08:002021-01-16T08:03:54.068-08:00FWIW, there is Teflon RG-188, but for what you'...FWIW, there is Teflon RG-188, but for what you're doing the difference in loss is meaningless and the only advantage over RG-316 is 188 being smaller and easier to handle. <br /><br />For HF, the lengths are so small that it just doesn't matter. Whatever you have that works.<br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.com