[Elecraft] Heil HC-4, HC-5 & Yamaha CM500

[Joe Subich, W4TV]

> Are you basing this on actual observations, or on frequency 
> range numbers on a datasheet? 

Based on posted spectral displays the CM-500 appears to have 
somewhat extended low frequency response with a slightly 
falling characteristic where the HC5 has a slight rising 
characteristic (about 3dB/octave) and the HC4 has a more 
strongly rising characteristic (about 5dB/octave) with a 
sharper low frequency roll-off.   

> All I'm doing with mine is cutting the bottom two octave 
> bands to minimize breath pops, and I would do that with 
> ANY mic.

Killing both the 50 and 100 Hz bands is a given with nearly 
any mic due to the proximity effect (bass boost) when they 
are "close talked" as they are in a headset.  However, given 
what I've seen of the CM-500, I would be tempted to start 
with a +6 at 1.60, +10 at 2.4 and +10 at 3.2 (6 dB/octave 
from 1000-2400 with a shelving response above that).  I will 
know for sure when mine arrives later in the week.  BTW, I 
also like to drop 800 Hz by 6-10dB to reduce noise in the 
interformat gap. 

73, 

   ... Joe, W4TV 
  
   



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jim Brown
> Sent: Tuesday, January 19, 2010 5:17 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Heil HC-4, HC-5 & Yamaha CM500
> 
> 
> On Tue, 19 Jan 2010 14:47:03 -0500, Joe Subich, W4TV wrote:
> 
> >The one issue with the microphone in the CM-500 is that
> >it has much more low frequency response than either the 
> >HC-5 or the HC-4.  Unless you want to waste a lot of power 
> >in useless low frequency audio response, the CM-500 will 
> >require a significant amount of TX EQ while the HC5/HC4 
> >can be used without eq. 
> 
> Are you basing this on actual observations, or on frequency 
> range numbers on a datasheet?  All I'm doing with mine is 
> cutting the bottom two octave bands to minimize breath 
> pops, and I would do that with ANY mic. This setting was 
> arrived at by critical reports from audio-conscious hams, 
> and by listening to others and helping them adjust their 
> TXEQ.  
> 
> 73,
> 
> Jim K9YC
> 
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html