Doug_G
Newbie
This is my first post on the forum & I just want to share how impressed I am with the conduct of everyone & the help which is provided. Everyone's input is greatly appreciated. I did a search & I don't see that anyone else has posted these questions.
I'm getting into radio direction finding due to an issue at work. From what I am reading in addition to what I am being told, I should be utilizing the best receiver that I can find. We just had a couple of Motorola Spectra 110w units removed from some of our fire apparatus due to narrow banding. Reading the manuals, these receivers have some impressive receiver specs. The Spectra receivers are just short of what the newer Kenwood TK790H receivers have in sensitivity & selectivity.
Researching on the installation of an analog & or LED S-meter for my RS Pro-2006 scanner leads me to believe that an external S-meter can be added to the Spectra. I just want to be sure I tap into the right place for the S-meter. I plan to build a combo analog LED S-meter. I want the LED capabilities in order to monitor the reading from the driver's seat. The analog meter will be utilized for more accurate readings.
1.) Can anyone tell me where exactly to tap into the Spectra's receiver circuit to install an external S-meter? I plan to run a piece of 174 coax to a connector on the back of the radio for an external plug.
2.) When I tap into the RF signal on the receiver board, will this deteriorate the quality of my received signal?
3.) I hope to run the Spectra audio out of the radio into my Ramsey DDF1 but, I don't want to ground the audio as warned. One side of the audio input for the Ramsey DDF1 is grounded. The information regarding the use of isolation transformers on the Spectra web sites are somewhat confusing to me with my limited electronics background. If someone can help guide me with diagrams & possibly pictures I would really appreciate it. I don't want to waste the time that I've put into building the DDF1 by burning it up or lose the audio PA in the Spectra.
If the Ramsey isn't able to fit the bill I am researching the use of the Montreal Doppler. The RS-232 output to a laptop for mapping would be nice.
Any input would be greatly appreciated.
Tnx,
Doug_G
I'm getting into radio direction finding due to an issue at work. From what I am reading in addition to what I am being told, I should be utilizing the best receiver that I can find. We just had a couple of Motorola Spectra 110w units removed from some of our fire apparatus due to narrow banding. Reading the manuals, these receivers have some impressive receiver specs. The Spectra receivers are just short of what the newer Kenwood TK790H receivers have in sensitivity & selectivity.
Researching on the installation of an analog & or LED S-meter for my RS Pro-2006 scanner leads me to believe that an external S-meter can be added to the Spectra. I just want to be sure I tap into the right place for the S-meter. I plan to build a combo analog LED S-meter. I want the LED capabilities in order to monitor the reading from the driver's seat. The analog meter will be utilized for more accurate readings.
1.) Can anyone tell me where exactly to tap into the Spectra's receiver circuit to install an external S-meter? I plan to run a piece of 174 coax to a connector on the back of the radio for an external plug.
2.) When I tap into the RF signal on the receiver board, will this deteriorate the quality of my received signal?
3.) I hope to run the Spectra audio out of the radio into my Ramsey DDF1 but, I don't want to ground the audio as warned. One side of the audio input for the Ramsey DDF1 is grounded. The information regarding the use of isolation transformers on the Spectra web sites are somewhat confusing to me with my limited electronics background. If someone can help guide me with diagrams & possibly pictures I would really appreciate it. I don't want to waste the time that I've put into building the DDF1 by burning it up or lose the audio PA in the Spectra.
If the Ramsey isn't able to fit the bill I am researching the use of the Montreal Doppler. The RS-232 output to a laptop for mapping would be nice.
Any input would be greatly appreciated.
Tnx,
Doug_G