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The transmitter alignment instructions for my Icom 751A tranceiver
calls for a 2 tone input during the alignment process.... "Insert 2 audio signals into the MIC Connector 1.9kHz at 3mV 1.3kHz at 3mV Are there AF generators out ther that will generate more than one tone? They do exist - I'm in the process of doing some restoration on an old Singer tone generator which does arbitrary pairs of frequencies. These days, the easiest way to create a tone combination is usually to use PC software. Generate two sinewave tones at the two frequencies you want, with 50% amplitude or less, then mix 'em with the appropriate relative amplitudes. There's lotsa free software which will do this - e.g. Audacity on Linux and no doubt many others. You can then play the mixed file out through your PC sound card, or burn it to a CD-R and use a portable CD player to reproduce the sound... whichever is most convenient. In either case, feed the line-level output signal to a fixed or variable attenuator to get the voltage level you need. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
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