EMRFD Message Archive 1564

Message	Date	From	Subject
1564	2008-04-20 15:15:00	st2nh	help my junk box
hello all i want to order some toroids from (Kits and Parts dot Com) http://www.kitsandparts.com/toroids.php i wounder what the most common toroids # use in home lab and in homebrew qrp radio? i got a copy of emrfd but im a bit lazzy :-)to check this out!! 73 in advance
1565	2008-04-20 15:23:56	bob bailey	Re: help my junk box
I got the 146 piece kit for $25.00, it will have about all you will need to start out, don't forget to get the wire from qrp kits, as it is the special enamel coating that is easy to tin the ends, and it comes in 3 colors too. bob WB7DMX To: emrfd@yahoogroups.comFrom: st2nh@yahoo.comDate: Sat, 19 Apr 2008 23:47:53 +0000Subject: [emrfd] help my junk box hello alli want to order some toroids from (Kits and Parts dot Com)http://www.kitsandparts.com/toroids.phpi wounder what the most common toroids # use in home lab and in homebrew qrp radio?i got a copy of emrfd but im a bit lazzy :-)to check this out!!73 in advance _________________________________________________________________ Get in touch in an instant. Get Windows Live Messenger now. http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh_getintouch_042008 [Non-text portions of this message have been removed]
1568	2008-04-20 19:08:04	Ron [W5RCM / ZS1M...	Re: help my junk box
Hi, I've been wondering about using wire-wrap wire for toroids...does anyone have any experiences with that? -- 72, Ron McDowell - W5RCM / ZS1MCD Austin TX / Hermanus ZA w5rcm [at] Ham-Stuff [dot] NET bob bailey wrote: > I got the 146 piece kit for $25.00, it will have about all you will need to start out, don't forget to get the wire from qrp kits, as it is the special enamel coating that is easy to tin the ends, and it comes in 3 colors too. > > bob > WB7DMX >
1570	2008-04-20 19:11:52	Allison Parent	Re: help my junk box
1574	2008-04-21 06:55:25	Alan Yates	Re: help my junk box
On Sun, 20 Apr 2008, bob bailey wrote: > comes in 3 colors too. Three colours now? I didn't see that on the website - that would be very useful for taking the drudgery out of sorting out trifilar windings. For some applications I've used rainbow ribbon cable to wind transformers for easy sorting. Of course the wire is kind of thin, and the insulation quite thick in comparison. For the OP's question, I personally find I use lots of FT50-43, T37-2 and T37-6s. I used to use T50 sizes, but I prefer the smaller cores where usable. I still tend to use FT50-43s but I keep FT37-43 in the box too. Lately I've been using FT23-43s for RFCs in VHF projects. It can't hurt to keep pig-noses and beads too, but I find that I use them very rarely. I also rarely use -61 material, I probably should use it more. I do use T50 or T68-7 cores for VFOs and some -10 cores for VHF work, (unfortunately kits and parts doesn't carry T37 or T25-10 but -6 works there too, the T25-6 cores are handy for small signal VHF tanks even if not ideal). I built some antennas using T130-6 loading coils, and used an FT200-43 for experiments with loop antennas. -- Alan Yates http://www.vk2zay.net/