Grant,
The MH2/MH4 mic does not use the 8 volts directly - there is a resistor
between the 8 volt supply and the AF line,
and that is where the 10ma is used to power the electret elemant.
The 10 ma. used by the microphone has nothing to do with the total
current available from pin 6.
73,
Don W3FPR
On 7/26/2020 8:05 PM, Grant Youngman wrote:
I have the same question about the current available for the 8V at the mic
connector. Is it limited to 10ma, or will it actually support a somewhat
higher continuous current draw safely. Not just for the k3, but also the K4.
Grant NQ5T
On Jul 26, 2020, at 7:46 PM, Don Wilhelm <[email protected]> wrote:
Henk,
If indeed it is for a mic preamp, then try it without the preamp. The K3S has
2 stages of mic AF gain. Normal for the usual ham mics, and a Hi level for low
gain mic elements.
You must turn on bias to have the 8 volts appear at the mic jack. Do not use
with direct connection of a dynamic mic - it makes the mic 'sound funny'.
73,
Don W3FPR
On 7/26/2020 5:40 PM, Nr4c wrote:
What are you going to use this voltage for? I think it’s for a mic preamp. It
is not the source of bias for an electret mic. That comes on the mic pin when
turned On in the menu.
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