RE: [digitalradio] Anyone using a Cushcraft R5/ R7 on digital ?
Try wrapping all lines into and out of the sound card through one or more Type 43 powdered iron toroids. The toroids tend to block RF and they are easy to wrap and inexpensive. All of the major amateur retailers have these and expect to pay roughly three dollars a piece for them. Buy 4-6 of em or so. Basically, the sound card lines act as antennae and the toroids dissipate the alternating current inherent in the stray RF from your vertical. Or is it that the mass increases to infinity as you approach the speed of light. Just cannot remember which J. Try the toroids . . . they worked for me. Rick KH2DF/5 From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Andrew O'Brien Sent: Saturday, April 29, 2006 6:06 AM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] Anyone using a Cushcraft R5/ R7 on digital ? I have an R7 and use if on all bands. I do not get any RF into the computer except for 80M. Andy K3UK On 4/29/06, Mel [EMAIL PROTECTED] wrote: Hello, I'd like to have an offline discussion with someone who is using a vertical, and if they solved RF problems into the PC soundcard on the higher bands. Kind regards, Mel G0GQK Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links -- Andy K3UK Fredonia, New York. Skype Me : callto://andyobrien73 Also available via Echolink Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) SPONSORED LINKS Ham radio Craft hobby Hobby and craft supply YAHOO! GROUPS LINKS Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [digitalradio] Anyone using a Cushcraft R5/ R7 on digital ?
I have an R7 and use if on all bands. I do not get any RF into the computer except for 80M. Andy K3UK On 4/29/06, Mel [EMAIL PROTECTED] wrote: Hello, I'd like to have an offline discussion with someone who is using a vertical, and if they solved RF problems into the PC soundcard on the higher bands. Kind regards, Mel G0GQK Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links -- Andy K3UK Fredonia, New York. Skype Me : callto://andyobrien73 Also available via Echolink Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) SPONSORED LINKS Ham radio Craft hobby Hobby and craft supply YAHOO! GROUPS LINKS Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [digitalradio] Anyone using a Cushcraft R5/ R7 on digital ?
Andrew O'Brien wrote: I have an R7 and use if on all bands. I do not get any RF into the computer except for 80M. Andy K3UK On 4/29/06, Mel [EMAIL PROTECTED] wrote: Hello, I'd like to have an offline discussion with someone who is using a vertical, and if they solved RF problems into the PC soundcard on the higher bands. Kind regards, Mel G0GQK I have the R7, and I was getting RF into the shack on 20, 17, and 15M. I solved the problem by buying a bucketload ( literally! ) of ferrite cores on ebay, and installing them on all the cables inside. - Rich Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) SPONSORED LINKS Ham radio Craft hobby Hobby and craft supply YAHOO! GROUPS LINKS Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [digitalradio] Anyone using a Cushcraft R5/ R7 on digital ?
This is probably something that others have as a similar problem. I currently have a trapped 10/80 meter inverted vee dipole over the house with apex at 30 feet and it does cause some problems on 80 meters. When I had the addition of a full size trapped 40/160 meter inverted vee dipole (fed at the same point), I had problems on 160. I still have problems on 80 meters with feedback triggering the ALC on the rig. In the past I had a Cushcraft R7 on a tripod mount on the house and I don't recall having problems on 40 to 10 meters. The R7 uses a toroid core to act as a choke to prevent current flowing on the outside of coax and this may help. Also, the pattern doesn't tend to go down toward the ground as much as it does with a low band horizontal antenna. I also have a ground mounted Butternut HF-9V vertical which has over 30 radials from 30 to 100 feet long. This antenna is located about 150 feet from the house so it is quieter than other antennas since it doesn't pick up the home RF. I do have two fencing energizers (6 Joule) for my farm fencing which cause quite a bit of pulse noise, but the noise blankers can generally handle them. Because the vertical location has what I consider a very good radial system on fairly good conductivity soil, I wanted to use it for 160. The Butternut is too short to work well on that band due to efficiency and bandwidth limitations, so I rigged up an L that is only about 20 feet high on average and clips on to the feedpoint of the Butternut and angles away toward the house. I was able to get better results with some tests with nearby stations (50 miles) as well as longer distances and so removed the dipole. The addition of the L does not seem to affect the SWR or performance of the vertical and appears to be a reasonable match on 60 meters as a bonus band since it is about 3/4 wavelength. From my most recent tests, the vertical does not seem to cause any problems on any bands but I am sure the major factor is that it is so far from the house. It is not a very effective antenna on NVIS operation for 80 meters so I still need the high angle radiation. The only other solution that I had was to use a choke on the audio line from the computer to the rig. I wrapped about 20 turns of the audio line around a ferrite rod. This was an Amidon unit that I had in stock and is about 7 and 1/2 inches long and half inch in diameter. The permeability I think was 125 but I would have to find the data sheet on it to be sure. I tried a large toroid core of unknown material, but had no luck with half a dozen turns, thus the reason for trying out the rod. All these tests were done mostly on my Icom 756 Pro 2 which seems to be more susceptible to RF issues although I have not tested this thoroughly with my other two rigs (Ten Tec Pegasus and Kenwood TS440SAT). Many years ago, I used to run the 440 on Amtor and even Pactor before they shut down the Aplink/Winlink system and I don't recall having RF issues, but that was mostly on the higher bands. 73, Rick, KV9U Mel wrote: Hello, I'd like to have an offline discussion with someone who is using a vertical, and if they solved RF problems into the PC soundcard on the higher bands. Kind regards, Mel G0GQK Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) SPONSORED LINKS Ham radio Craft hobby Hobby and craft supply YAHOO! GROUPS LINKS Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
