Re: Topband: Air Wound Coil

2018-08-31 Thread Richard (Rick) Karlquist
On 8/31/2018 6:09 AM, Jim Thomson wrote: ##  Are you sure about this ?   I have used  .25 edge wound rollers, I am sure that flat conductors result in lower Q than round conductor. I have done innumerable Q meter measurements to confirm this. I didn't say that flat conductors don't work

Re: Topband: Air Wound Coil

2018-08-31 Thread Clive GM3POI
Trevor, You do not make it clear whether you want to match the antenna with a hairpin match or with an L match. I find with a hairpin that the inductance does not change much from the needed but the top loading will need adjusting. You may find it better to put the 1:1 point at something like

Re: Topband: Air Wound Coil

2018-08-31 Thread MR TREVOR DUNNE
Thanks again for all the replies Guys, I am running so late on getting ready for this season I am just looking for a quick and easy way out, I'll get the vertical up and see what I need, I might be over complicating things as usual, Thanks Trevor EI2GLB - Original Message - From: "MR

Re: Topband: Air Wound Coil

2018-08-31 Thread Jim Thomson
-Original Message- From: Richard (Rick) Karlquist Sent: Thursday, August 30, 2018 5:44 PM To: Guy Olinger K2AV ; Jim Thomson Cc: TopBand List Subject: Re: Topband: Air Wound Coil On 8/30/2018 3:44 PM, Guy Olinger K2AV wrote: You can also get the edge-wound (flat) 1/4 inch by 1/16

Re: Topband: Air Wound Coil

2018-08-31 Thread Jim Thomson
-Original Message- From: Richard (Rick) Karlquist Sent: Friday, August 31, 2018 7:13 AM To: Jim Thomson ; Guy Olinger K2AV Cc: TopBand List Subject: Re: Topband: Air Wound Coil ## What are you using to measure Q ?? I did discover one anomoly with coils and Q. XL increases

Re: Topband: Air Wound Coil

2018-08-31 Thread Guy Olinger K2AV
Hi Rick, Wes, I said it was a "killer piece of copper". I did not compare it to anything. Mostly I like the way that edge-wound coil looks (what was on my mind when I said "killer") The same way I like a lit up and glowing red 3-1000Z putting out 1500 watts, or the spooky glow of 866A's and