Re: Topband: RFI ferrites
On 5/17/2013 8:41 AM, Charlie Cunningham wrote: Contact Lynne Frye at Kreger Components, Inc. Salem, VA. I've done biz with Kreiger at least once and been pleased. Do not waste your money and their time buying small quantities of ferrite parts. Appendix One of my RFI tutorial includes Fair-Rite part numbers of the useful parts, a list of known good vendors, and a worksheet to help hams decide how many they should buy based on their operating habits. If you're buying small quantity (less than a few boxes) it pays to call multiple distributors -- those with stock left over from a big order will be cheaper. Organize a group purchase of your local club and get quantity discounts that make the parts you need very inexpensive. I've been part of at least a half dozen such efforts over the years. I typically pay $4-$5 for a 2.4-in o.d. toroid, and $10-$12 for the biggest clamp-ons (1-inch i.d.). Fair-Rite is easy to deal with if you hit their minimums and buy box quantities, and they will drop ship boxes to more than one locations. A box of toroids is 100 pieces, and the biggest clamp-ons are 36 to a box. We do want box quantities because there is much less breakage in full boxes packed by Fair-Rite. 73, Jim K9YC. All good topband ops know how to put up a beverage at night. _ Topband Reflector
Re: Topband: RFI ferrites
Very good points, Jim, and I agree! As I said earlier, Lynne and the folks at Kreger can point us to the other Fair-Rite distributors - but I expect that the same advice still applies! In my past experience, I was dealing with substantial industrial quantities for electricity meters etc. and the designer kits were generally supplied free of charge to a large customer. Not to be expected here. Charlie, K4OTV Charles Cunningham, Jr. PE -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Jim Brown Sent: Saturday, May 18, 2013 2:13 AM To: topband@contesting.com Subject: Re: Topband: RFI ferrites On 5/17/2013 8:41 AM, Charlie Cunningham wrote: Contact Lynne Frye at Kreger Components, Inc. Salem, VA. I've done biz with Kreiger at least once and been pleased. Do not waste your money and their time buying small quantities of ferrite parts. Appendix One of my RFI tutorial includes Fair-Rite part numbers of the useful parts, a list of known good vendors, and a worksheet to help hams decide how many they should buy based on their operating habits. If you're buying small quantity (less than a few boxes) it pays to call multiple distributors -- those with stock left over from a big order will be cheaper. Organize a group purchase of your local club and get quantity discounts that make the parts you need very inexpensive. I've been part of at least a half dozen such efforts over the years. I typically pay $4-$5 for a 2.4-in o.d. toroid, and $10-$12 for the biggest clamp-ons (1-inch i.d.). Fair-Rite is easy to deal with if you hit their minimums and buy box quantities, and they will drop ship boxes to more than one locations. A box of toroids is 100 pieces, and the biggest clamp-ons are 36 to a box. We do want box quantities because there is much less breakage in full boxes packed by Fair-Rite. 73, Jim K9YC. All good topband ops know how to put up a beverage at night. _ Topband Reflector All good topband ops know how to put up a beverage at night. _ Topband Reflector
Topband: Thanks!
Hi Folks; Thanks a bunch, to all those who responded with source possibilities for 31 mix toroids ! I will add a note here, after I actually make a purchase to designate the lucky victim of my small purchase. 73 Dean W5PJR Tijeras, NM All good topband ops know how to put up a beverage at night. _ Topband Reflector
Topband: Titanex V160HD Sloppy Tube-Joints
Hi All and thanks for reading. When I luffed-over my 6 year old V160HD for it's annual maintenance check, it struck me just how sloppy all the various jointed sections have become. It's not that the securing bolts have become loose, they're still firm and tight. As owners will know, there are two doughnut shaped shims per section joint to adjust for the difference in tube sizes and it's the play between these and the tube ends that's the problem. I don't remember there being between a half to one mm gaps around the circumference in the past? I don't know whether new shims would fix it but Titanex no longer answer emails and I wouldn't know where to start trying to find an outsource willing to make me a few new ones to the required tolerances. Adding any more guys than the set I have at 12m is also a no go. The only thing I think may help, is to try increasing the tube overlap at each joint from the present nominal 5 inch to say 10 inch or more? Possibly adding an additional bolt at each joint also? I wonder if any other Titanex owners have had this problem and have any advice to share please? Many thanks in advance. Dave G4GED All good topband ops know how to put up a beverage at night. _ Topband Reflector
Re: Topband: Thanks!
Good luck, Dean!! I'm sure you can find what you need! (I've even thought about approaching Kreger Components about establishing a small dealership to serve the amateur community) I think that Jim's comments about buying box-sized lots to minimize damage, have merit, though. Good luck in your quest - I'm sure that you can find just what you need! Best regards, Charlie, K4OTV Charles Cunningham, Jr. PE -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of dospi...@q.com Sent: Saturday, May 18, 2013 9:38 AM To: topband@contesting.com Subject: Topband: Thanks! Hi Folks; Thanks a bunch, to all those who responded with source possibilities for 31 mix toroids ! I will add a note here, after I actually make a purchase to designate the lucky victim of my small purchase. 73 Dean W5PJR Tijeras, NM All good topband ops know how to put up a beverage at night. _ Topband Reflector All good topband ops know how to put up a beverage at night. _ Topband Reflector
Topband: Titanex 160HD
They have also changed the diameters of the tubes, so any spares that you buy will not fit the older models. I just used some aluminium shims plus a bolt, and as long as you keep it tight it seems to work ok. I would also guy it twice. You could also try contacting Steffen Freitag DL6SFR as he has helped me in the past with contacting Titanex. 73 Steve, ZC4Li. All good topband ops know how to put up a beverage at night. _ Topband Reflector
Re: Topband: Thanks!
Hi, Dean Well good luck in your hunt. Over the years I've found many uses for various Fair-Rite cores at HF. If you get the larger beads/tubes thatwill fit over RG-213 etc. you can make excellent 1:1 current baluns by slipping them over the cable before putting the connector on. You can hold them in place with wire-ties. The ferrite is completely impervious to weather as far as I can tell. I've also used Fair-Rite cores to construct the input matching transformer in my home-brew 3-500Z amp and I've used smaller binocular cores to wind matchng transformers for 160 receiving loops. So, many applications for the cores - not just on Topband! :-) Have a good afternoon! Charlie, K4OTV -Original Message- From: dospi...@q.com [mailto:dospi...@q.com] Sent: Saturday, May 18, 2013 12:24 PM To: Charlie Cunningham Subject: Re: Topband: Thanks! Hi Charlie: Thanks for the infos and the good wishes. Im looking at the fair-rite catalog and trying to come up with a good selection for experimentation when I run into RFI problems. Not sure how much of a ham market there really is, outside of the lowbanders. I never hear anybody else complaining about it. I guess the buy bulk advice is good for somebody, but certainly didnt address my question. 73 and TU again Dean W5PJR Tijeras, NM - Original Message - From: Charlie Cunningham charlie-cunning...@nc.rr.com To: dospi...@q.com, topband@contesting.com Sent: Saturday, May 18, 2013 10:17:18 AM Subject: RE: Topband: Thanks! Good luck, Dean!! I'm sure you can find what you need! (I've even thought about approaching Kreger Components about establishing a small dealership to serve the amateur community) I think that Jim's comments about buying box-sized lots to minimize damage, have merit, though. Good luck in your quest - I'm sure that you can find just what you need! Best regards, Charlie, K4OTV Charles Cunningham, Jr. PE -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of dospi...@q.com Sent: Saturday, May 18, 2013 9:38 AM To: topband@contesting.com Subject: Topband: Thanks! Hi Folks; Thanks a bunch, to all those who responded with source possibilities for 31 mix toroids ! I will add a note here, after I actually make a purchase to designate the lucky victim of my small purchase. 73 Dean W5PJR Tijeras, NM All good topband ops know how to put up a beverage at night. _ Topband Reflector All good topband ops know how to put up a beverage at night. _ Topband Reflector
