Re: Topband: Transmit High Pass Filters for BCB Interference

2019-07-29 Thread Michael Clarson
For signals reaching your equipment via coax shield: I found something that works very well to eliminate this is a pair of back to back baluns as close to the rcvr as possible. --Mike, WV2ZOW On Mon, Jul 29, 2019 at 1:34 PM Grant Saviers wrote: > Here is what I used when I had the same problem

Re: Topband: FT8 and digital QRM

2017-11-29 Thread Michael Clarson
160 is the only HF band where all HF modes (except CW) have no restrictions. The FT8 guys will really enjoy the CQ WW 160 SSB contest! At least 160 isn't all that useful to the 2.8 kHz wide Sailmail guys -- they really use the full 2.8 kHz. The band segmants are pretty consistent on all the bands.

Re: Topband: Why do rodents eat coax?

2015-11-09 Thread Michael Clarson
Dave: For some reason, a lot of animals like to chew on or eat PVC. That is why cats chew on line cords. I had a run of RG213 on the ground in my suburban yard, Squirrels chewed through it 3 times in 5 years. I replaced it with a polyethylene jacket cable, and its been left alone for 7 years so

Re: Topband: Unknown Pulse Signal Wiping out 1900-1925 kHz

2014-12-09 Thread Michael Clarson
All: Turned on my radio to listen to the ARRL 160, and saw it. First thought was what piece of crap in my house is doing THAT. But as we now know, its something big. Since CODAR was suggested, I compared it to CODAR around 4.8 MHz. Similar, but not the same. BW is similar, but the CODAR I saw

Re: Topband: Deployable radials for 80/160M

2014-06-23 Thread Michael Clarson
While probably too much for 40 radials, I have taken to using extra extension cords for temporary radials. They are bright orange so easy to see, connect together with cube taps or outlet strips, 100 foot ones are as low as $17 (ok -- 16 ga, but these are not for power), coil easily, stay down by

Topband: Laird ferrites

2012-07-03 Thread Michael Clarson
Just some information: Laird purchased Cushcraft in, I think, 2008. They later sold the amateur line to MFJ, but kept the commercial products. Back then, their web site was pretty bad for antennas. Its been getting better, but still could ues a lot of work, but unlike the ferrite products, their