I recently swapped the Heil HC-4 ("DX") element in my Proset with the HC-5
"normal". Netiehr is new. I suspect hey're both ~10-13 years old.
The specs Heil posts on their website say the mikes are fundamentally the same
(same frequency range, with the HC-5 having a mid-range 'bump' presumably to
increase fidelity), I did note that the impedance is different. There's a
physical difference, too. The HC-5 has a larger hole, which I assume has an
impact on the frequency response.
I've noticed that the HC-5 needs a significantly higher mike level -- almost at
the top of the range -- to drive the Orion. If I run it through the computer's
built-in sound card and use the high-boost setting, the radio is seriously
(negatively) overdriven.
Is this to be expected? If not, is there a remedy?
Thanks,
Eric W3DQ
Washington, DC
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