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Type: Posts; User: smccombs

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  1. I talked to a local ham op. he pointed me to the...

    I talked to a local ham op. he pointed me to the same calculator calling it a "t-attenuator".
    https://chemandy.com/calculators/matching-t-attenuator-calculator.htm

    He said to do 50ohm in, 50ohm...
  2. I looked at that link myself but did not...

    I looked at that link myself but did not understand how it reduced the voltage.
  3. The spectrum analyzer antenna was specifically...

    The spectrum analyzer antenna was specifically built for this transmitter's frequency.
  4. I'm not a EE :D but I have used Arduino like...

    I'm not a EE :D but I have used Arduino like devices for 8 years or more (FTDI was useful then).

    Freq is 40mhz
    +10dBm on Spectrum Analyzer with the antenna within 1 foot of the transmitter's...
  5. String SerialInString; int xtimeInterval =...

    String SerialInString;

    int xtimeInterval = 3000;
    unsigned long xtimeLast = millis();

    int ytimeInterval = 1000;
    unsigned long ytimeLast = millis();

    void setup() {
    Serial.begin(9600);
  6. When rf is on and pin 13 disconnected system...

    When rf is on and pin 13 disconnected system prints correctly.

    ---example of rx from teensy--
    13:26:03.178 -> a
    13:26:04.158 -> a
    13:26:05.170 -> a
    13:26:06.151 -> a
    13:26:07.167 -> a...
  7. Teeny3.5 FreqCount Lib HWSerial1 tx noise?

    Teeny3.5 FreqCount Lib HWSerial1 tx noise?

    I have a rf transmitter wired directly to pin 13 and teensy is grounded to the rf transmitter, usb, and power supply. The rf device is 24v. I found it...
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