I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about replacing theantenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
You can check your stuff using a common SRW meter. But your new radio will certainly tell you if your antenna is bad
around the existing coax cable where possible and affixing a new antenna inside the vertical stabilizer in the space between the rudder and the rear fin bulkhead. Fidel at One Air Composites says there is generally enough clearance to avoid frictionYou can check your stuff using a common SRW meter. But your new radio will certainly tell you if your antenna is bad
I will be checking the cable and antenna with an SWR (Standing Wave Ratio) meter this week. If I have a problem, I have been advised to leave the current cable and antenna in place. The suggestion is to run a new cable through the fuselage, looping it
Unfortunately, there does not appear to be any "easy" way to access the fin antenna for either removal or connector inspection. I guess what I will do first is check with an SWR meter. If the reading is reasonably OK, I will probably leave the antennaand cable in place and check again with the new radio. If there is an improvement in RX/TX, I will probably leave it alone. If not, a more complex solution will be considered. Just trying to keep things simple. You know, following the path of least
On Wednesday, September 6, 2023 at 5:53:11 AM UTC-7, Mark628CA wrote:antenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about replacing the
An SWVR test is a somewhat crude measurement that gives you a gross indication. A far better test is time domain reflectometry (TDR). TDRs used to be very expensive instruments, but not necessarily so these days:
https://www.amazon.com/dp/B0825PZNJJ/ref=syn_sd_onsite_desktop_0?ie=UTF8&psc=1&pd_rd_plhdr=t
Tom 2G
I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about replacing theantenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
Wow! The instrument is much smaller and less expensive than the Hewlett-Packard oscilloscope I used in college back in '72.the antenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
Dan
5J
On 9/15/23 15:41, 2G wrote:
On Wednesday, September 6, 2023 at 5:53:11 AM UTC-7, Mark628CA wrote:
I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about replacing
An SWVR test is a somewhat crude measurement that gives you a gross indication. A far better test is time domain reflectometry (TDR). TDRs used to be very expensive instruments, but not necessarily so these days:
https://www.amazon.com/dp/B0825PZNJJ/ref=syn_sd_onsite_desktop_0?ie=UTF8&psc=1&pd_rd_plhdr=t
Tom 2G
On Friday, September 15, 2023 at 3:04:08 PM UTC-7, Dan Marotta wrote:the antenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
Wow! The instrument is much smaller and less expensive than the
Hewlett-Packard oscilloscope I used in college back in '72.
Dan
5J
On 9/15/23 15:41, 2G wrote:
On Wednesday, September 6, 2023 at 5:53:11 AM UTC-7, Mark628CA wrote: >>>> I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about replacing
individual transistors hand-soldered into a circuit board, and integrated circuits with a few dozen transistors was considered revolutionary.
An SWVR test is a somewhat crude measurement that gives you a gross indication. A far better test is time domain reflectometry (TDR). TDRs used to be very expensive instruments, but not necessarily so these days:
https://www.amazon.com/dp/B0825PZNJJ/ref=syn_sd_onsite_desktop_0?ie=UTF8&psc=1&pd_rd_plhdr=t
Tom 2G
Most people have no idea how much stuff they can pack into a VLSI (very large scale integrated) circuit these days, with the most complex having more than 100 BILLION transistors on a single chip. Bear in mind, that I worked with computers built with
Tom 2G
Yup. Outside of college, I started by installing my own-built devicesthe antenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
in the back plane of a Nova 800 computer, a 16-bit, single-user
computer. It had 32K words of memory and a 19-inch rack mounted hard
drive of 5 MB. Imagine: Entering the bootstrap loader via the front
panel switches, to start from the paper tape reader.
We've come a long way...
Dan
5J
On 9/15/23 19:28, 2G wrote:
On Friday, September 15, 2023 at 3:04:08 PM UTC-7, Dan Marotta wrote:
Wow! The instrument is much smaller and less expensive than the
Hewlett-Packard oscilloscope I used in college back in '72.
Dan
5J
On 9/15/23 15:41, 2G wrote:
On Wednesday, September 6, 2023 at 5:53:11 AM UTC-7, Mark628CA wrote: >>>> I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about replacing
individual transistors hand-soldered into a circuit board, and integrated circuits with a few dozen transistors was considered revolutionary.
An SWVR test is a somewhat crude measurement that gives you a gross indication. A far better test is time domain reflectometry (TDR). TDRs used to be very expensive instruments, but not necessarily so these days:
https://www.amazon.com/dp/B0825PZNJJ/ref=syn_sd_onsite_desktop_0?ie=UTF8&psc=1&pd_rd_plhdr=t
Tom 2G
Most people have no idea how much stuff they can pack into a VLSI (very large scale integrated) circuit these days, with the most complex having more than 100 BILLION transistors on a single chip. Bear in mind, that I worked with computers built with
Tom 2G
On Saturday, September 16, 2023 at 8:09:38 AM UTC-7, Dan Marotta wrote:the antenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
Yup. Outside of college, I started by installing my own-built devices
in the back plane of a Nova 800 computer, a 16-bit, single-user
computer. It had 32K words of memory and a 19-inch rack mounted hard
drive of 5 MB. Imagine: Entering the bootstrap loader via the front
panel switches, to start from the paper tape reader.
We've come a long way...
Dan
5J
On 9/15/23 19:28, 2G wrote:
On Friday, September 15, 2023 at 3:04:08 PM UTC-7, Dan Marotta wrote: >>>> Wow! The instrument is much smaller and less expensive than the
Hewlett-Packard oscilloscope I used in college back in '72.
Dan
5J
On 9/15/23 15:41, 2G wrote:
On Wednesday, September 6, 2023 at 5:53:11 AM UTC-7, Mark628CA wrote: >>>>>> I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about replacing
individual transistors hand-soldered into a circuit board, and integrated circuits with a few dozen transistors was considered revolutionary.
An SWVR test is a somewhat crude measurement that gives you a gross indication. A far better test is time domain reflectometry (TDR). TDRs used to be very expensive instruments, but not necessarily so these days:
https://www.amazon.com/dp/B0825PZNJJ/ref=syn_sd_onsite_desktop_0?ie=UTF8&psc=1&pd_rd_plhdr=t
Tom 2G
Most people have no idea how much stuff they can pack into a VLSI (very large scale integrated) circuit these days, with the most complex having more than 100 BILLION transistors on a single chip. Bear in mind, that I worked with computers built with
Tom 2G
I even used a vacuum tube computer in college, an Alwac III-E at OSU: https://en.wikipedia.org/wiki/ALWAC_III-E#:~:text=The%20ALWAC%20III%2DE%20was,the%20Alwac%20III%20computer%2C%201959.
Tom 2G
You win, Tom. Hands down!replacing the antenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
Dan
5J
On 9/17/23 22:20, 2G wrote:
On Saturday, September 16, 2023 at 8:09:38 AM UTC-7, Dan Marotta wrote:
Yup. Outside of college, I started by installing my own-built devices
in the back plane of a Nova 800 computer, a 16-bit, single-user
computer. It had 32K words of memory and a 19-inch rack mounted hard
drive of 5 MB. Imagine: Entering the bootstrap loader via the front
panel switches, to start from the paper tape reader.
We've come a long way...
Dan
5J
On 9/15/23 19:28, 2G wrote:
On Friday, September 15, 2023 at 3:04:08 PM UTC-7, Dan Marotta wrote: >>>> Wow! The instrument is much smaller and less expensive than the
Hewlett-Packard oscilloscope I used in college back in '72.
Dan
5J
On 9/15/23 15:41, 2G wrote:
On Wednesday, September 6, 2023 at 5:53:11 AM UTC-7, Mark628CA wrote:
I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about
with individual transistors hand-soldered into a circuit board, and integrated circuits with a few dozen transistors was considered revolutionary.
An SWVR test is a somewhat crude measurement that gives you a gross indication. A far better test is time domain reflectometry (TDR). TDRs used to be very expensive instruments, but not necessarily so these days:
https://www.amazon.com/dp/B0825PZNJJ/ref=syn_sd_onsite_desktop_0?ie=UTF8&psc=1&pd_rd_plhdr=t
Tom 2G
Most people have no idea how much stuff they can pack into a VLSI (very large scale integrated) circuit these days, with the most complex having more than 100 BILLION transistors on a single chip. Bear in mind, that I worked with computers built
Tom 2G
I even used a vacuum tube computer in college, an Alwac III-E at OSU: https://en.wikipedia.org/wiki/ALWAC_III-E#:~:text=The%20ALWAC%20III%2DE%20was,the%20Alwac%20III%20computer%2C%201959.
Tom 2G
On Saturday, September 16, 2023 at 8:09:38 AM UTC-7, Dan Marotta wrote:replacing the antenna and cable? Or should I just go with a dipole inside the (fiberglass) tail boom? I will test the system with an SWR meter and hope I don't have any issues, but just in case.....
Yup. Outside of college, I started by installing my own-built devices
in the back plane of a Nova 800 computer, a 16-bit, single-user
computer. It had 32K words of memory and a 19-inch rack mounted hard
drive of 5 MB. Imagine: Entering the bootstrap loader via the front
panel switches, to start from the paper tape reader.
We've come a long way...
Dan
5J
On 9/15/23 19:28, 2G wrote:
On Friday, September 15, 2023 at 3:04:08 PM UTC-7, Dan Marotta wrote:
Wow! The instrument is much smaller and less expensive than the
Hewlett-Packard oscilloscope I used in college back in '72.
Dan
5J
On 9/15/23 15:41, 2G wrote:
On Wednesday, September 6, 2023 at 5:53:11 AM UTC-7, Mark628CA wrote:
I am thinking about upgrading my radio transceiver in my 40 year old Pegasus. By this time, I wouldn't be surprised if the coax cable to the fin antenna has degraded due to cracked insulation or something like that. Any suggestions about
with individual transistors hand-soldered into a circuit board, and integrated circuits with a few dozen transistors was considered revolutionary.
An SWVR test is a somewhat crude measurement that gives you a gross indication. A far better test is time domain reflectometry (TDR). TDRs used to be very expensive instruments, but not necessarily so these days:
https://www.amazon.com/dp/B0825PZNJJ/ref=syn_sd_onsite_desktop_0?ie=UTF8&psc=1&pd_rd_plhdr=t
Tom 2G
Most people have no idea how much stuff they can pack into a VLSI (very large scale integrated) circuit these days, with the most complex having more than 100 BILLION transistors on a single chip. Bear in mind, that I worked with computers built
Me, too, but it was the IBM 709. We didn't get to even approach it, but just handed over a punched card deck to get our programs run. https://en.wikipedia.org/wiki/IBM_709I even used a vacuum tube computer in college, an Alwac III-E at OSU: https://en.wikipedia.org/wiki/ALWAC_III-E#:~:text=The%20ALWAC%20III%2DE%20was,the%20Alwac%20III%20computer%2C%201959.Tom 2G
Tom 2G
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