Re: Topband: Receive loop observations

Ok guys how well will that loop Jim is talking about over a radial field if this receiving antenna is about 5 -7 feet off the ground? How far do you need to stay away from your radial field? >From what I have been reading loop antennas and shielded loops couple into your radial field and pick up

Re: Topband: Receive loop observations

On Sat,4/2/2016 12:52 PM, HankP wrote: BTW Kits and Parts has good assortment of cores at reasonable priceshttp://www.kitsandparts.com/toroids.php 73 Hank K7HP That depends on how much markup you consider reasonable. The BEST way, by far, to buy ferrite parts is to buy in quantity from

Re: Topband: Receive loop observations

The 50 turns/5 turns transformer is specific to the loop feed in my NCJ article. Are you cloning my design, or adding a transformer onto some other design? The core I called out is much larger than would be needed for electrical reasons, but is chosen because the large size makes is relatively

Re: Topband: Receive loop observations

BTW Kits and Parts has good assortment of cores at reasonable prices http://www.kitsandparts.com/toroids.php 73 Hank K7HP - Original Message - > Just a question about loop matching ferrite coils..are these > available anywhere pre-wound anywhere. I wind the easy ones to match >

Topband: Shunt feeding

If anyone needs some info, drop me an email and I will send you some info. It has worked on towers from 55 to 80 ft with or with out a stack of antennas.  73 de  Price w0riw0ri...@sbcglobal.net _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: FT4JA easy copy tonite

They also peaked from the northeast here (so much for the two new 92-degree Beverages I put up this week!). Here's one of the recordings I made of last night's great opening (but not great enough for me to work yet): http://aa1k.us/listen-to-loud-ft4ja-signal-as-heard-at-aa1k/ 73/Jon AA1K

Re: Topband: Receive loop observations

Hi Raoul, Congratulations, its difficult to do better than a 40 dB null. It usually takes a great deal of care with proper loop balance and excellent feed line common isolation to achieve that excellent null depth. 73 Frank W3LPL - Original Message - From: "Raoul Coetzee"

Re: Topband: Half slopers ???

Doug: I have both types of antennas but on different bands. On 80M I use a half-sloper wire off the 64 foot tall tower tapped at the 55 foot level. I selected that spot on the tower because that gave me the best match on 80M. On 160M I shunt-feed my tower, with the tower tap also at 55

Re: Topband: Receive loop observations

Just a question about loop matching ferrite coils..are these available anywhere pre-wound anywhere. I wind the easy ones to match Beverages but the 50 turns is going to be a chore. Herb, KV4FZ On 4/2/2016 8:48 AM, James Rodenkirch wrote: Thank you to all for the

Re: Topband: Receive loop observations

Thank you to all for the replies/comments/suggestions --- I am all over finding a #61 or #43 material core for a xfmr71.5/72 de Jim R. K9JWV From: Topband on behalf of Jim Brown Sent:

Re: Topband: Half slopers ???

Are we talking half slopers or quarter wave slopers here. . shield bonded to the tower at the top. 73 Ed N1UR _ Ed I was talking exactly about such (quarter wave ) sloper and I have had shield connected to the tower at the top. SWR was 1:1 on both 160 and 80m but there were

Re: Topband: Half slopers ???

Are we talking half slopers or quarter wave slopers here. I have a 70 ft tower and had very poor performance with quarter wave slopers on either band (80/160). On 80 I tried a resonant roughly 65 ft wire with the shield bonded to the tower at the top. For 160 added a loading coil near the

Re: Topband: FT4JA easy copy tonite

Well, for some of us that don't have RX antennas (yet) he was definitely not super easy to copy, but there was at least a 30-45 minute interval when he was very workable using my Inv-L on TB and I was in the pileup!! Like you, I don't think I made it, but it was enjoyable just being in the

Re: Topband: Receive loop observations

Rick wrote:>With a>circumference of 20 to 40 feet on 160 meters, the null is only >10 or 15 dB deep. I use a medium wave  BC station about 10miles away from as a reference to check my 160m loop, (the loop is reasably broadband but no good on 80m) they are about 4 Degrees East off me and with a

Re: Topband: Half slopers ???

Hi, I am trying to work on 160m (also on 80m) from a city lot. I have been reading about half slopers in the ARRL Wire antenna classics B (chapter 7). I have a 50 ft grounded tower available and can run an sloping wire 60 ft (1/4 wl on 80m) then add an 80m trap and more wire to work 160m.