On 3/9/2022 2:31 PM, [email protected] wrote:
However, it would be good to know if your mic needs extra supply voltage
("phantom") or not. If your mic is a cheap one, than it is probably no
condenser mic and doesn't need it.
Note the K2 can supply +5V on the MIC connector, while the phantom
voltage is 48V.
Phantom power ranges from about 12V to 48V, depending on the mic. Professional mics that require phantom power are NOT compatible with the unbalanced inputs that are used on all ham gear I'm aware of. The ONLY way they could be used is with a dedicated phantom power supply followed by a suitable audio transformer between the PSU and the rig.
Professional DYNAMIC mics ARE compatible with virtually all ham mic inputs, requiring nothing more than a properly wired cable adapter. Pin 2 of the XLR goes to Mic In, Pin 3 goes to Mic Return, Pin 1 goes to the shielding enclosure (chassis). Bias should be turned off.
Pro mics are, however, serious overkill for ham radio. "A fool and his money . . . ." But if it's free, why not? :)
I'm speaking as a retired audio professional, ham for 66 years.A stock K2, unfortunately, is not a great SSB rig, for several reasons. First, the audio chain lacks enough gain to activate the limiter enough to matter, needs low end rolloff. Second, while the RX sounds very good on SSB at full bandwidth (where it uses the TX SSB filter), when the RX crystal filter is re-aligned for narrower bandwidth, the response is VERY peaky, creating so much phase distortion that it makes speech more difficult to understand.
This is not surprising -- it started out life as a QRP CW rig, so adding SSB was a compromise.
73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.htmlMessage delivered to [email protected]
