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Post by part15engineer on Nov 15, 2020 16:39:01 GMT
does the am transmitter need to be a complete floating ground? IE: the case and AC power leads ungrounded and an isolation transformer on the audio line to make neutral load work? i'm having a bit of a difficult time getting either hot load or neutral load to tune up at all i'm using a boiler baseboard heater pipe as my isolated ground and in hot load i was using neutral and hot. neither way tuned up correctly on a T2C coupler. i also tried various open frequencies across the am band from low to high. it should be noted that the two adjacent buildings i'm trying to cover are on a common transformer. caps on T2C are not open or shorted. they seem to ohm out ok.
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Post by Boomer on Nov 15, 2020 23:12:07 GMT
Float On by The Floaters
It should work either way since the coupler had a toroid transformer in it whose primary and secondary provide isolation.
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Post by part15engineer on Nov 15, 2020 23:22:11 GMT
i thought so, i had to set tx to 630 am, 50 ohm on coupler and use the isolated ground with hot lead to get a decent signal into the next building, but it interferes with my broadcastify (streaming scanner) and zello (GMRS link radio) by keying the zello on both pc and radio as well as getting into broadcastify audio feed and zello audio on both ends (radio and pc). doesn't appear to interfere with anything else. i'm going to eventually try moving it to the other room and running audio feed into other room from rack and see if doing so alleviates those issues
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Post by Druid Hills Radio on Nov 16, 2020 15:06:15 GMT
i thought so, i had to set tx to 630 am, 50 ohm on coupler and use the isolated ground with hot lead to get a decent signal into the next building, but it interferes with my broadcastify (streaming scanner) and zello (GMRS link radio) by keying the zello on both pc and radio as well as getting into broadcastify audio feed and zello audio on both ends (radio and pc). doesn't appear to interfere with anything else. i'm going to eventually try moving it to the other room and running audio feed into other room from rack and see if doing so alleviates those issues I thought you were out of the Part 15 game? |
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Post by part15engineer on Nov 16, 2020 15:25:55 GMT
i'm back in an apartment again with 52 units so it's worth doing part 15 am again.
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Post by thelegacy on Nov 21, 2020 3:24:37 GMT
Especially carrier current because they should hear you with no issue.
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Post by mark on Nov 22, 2020 18:52:34 GMT
Good idea by thelegacy. If you can get that signal through the wiring may be good. Although if you get the meter reading up to at least 9(with the Procaster) when tuned you should do great in the building. And outside too. When power is off the meter should be at 0. You can adjust it with the trimmer to the right of the meter.
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