Just as a suggestion you might use something like fldigi in it's CW mode and send the Morse signal that way. You may have to include a VOX switch id the BitX doesn't have that. It can be included in the interface to/from the computer sound card. It may be needed for using the digital modes anyway.
Using the push to talk in SSB with no audio input should produce no output just at the others have said. Between the balanced modulator and the filter you should be in the microwatt (or low millwatt) range with the carrier leakage.
73,
Bill KU8H
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On 5/17/20 11:18 AM, Evan Hand wrote:
Scott,
Yes, it is normal for all SSB transmitters to have no power out without any audio.? It is why they are more efficient than AM transmitters.? For most trancievers there is a CW mode that allows you to send a pure carrier when the CW key is pressed.? That is how I do tuning/SWR checks with my uBITX.
I checked the BITX40 schematic and found no CW key input.? The only way that I can think of to do the equivalent would be to use a tone generator to feed either one or two tones into the microphone input. Alternatively, you could use a tone generation program on a PC and hold the mic near the speaker to generate the tone.
Here is a single tone generator that is free
I would recommend using 1,000 Hrz as the tone.
An actual owner of a BITX40 may have another way, as maybe there is a way to set up the transceiver for CW.
73
Evan
AC9TU
--
bark less - wag more
