[Elecraft] OT (Yamaha Cm 500)

Wed Nov 17 08:31:38 EST 2010

With all your respect AL but with those settings you are making a "condensed milk can" sound,I mean extremenly high pitch and very difficult for others to hear you.
Joe is right,you need some lows and more highs,for your reference this is how I set my CM-500 for dx work:
50, 100,and 200 Hz all them down to -16db
400 and 800 Hz at cero 
1600 at +3db
2400 at +6db
3200 at +9 db
And Joe is right,you need to hear yourself in another radio or get somebody you trust who had good ear and of course good radio to help you out.In my case everytime I do a change in my settings I monitor myself in my backup radio,the TS-590S.

Hector
AD4C
K3 # 2192

"If you see a driver handling a cell phone on her/his hands while driving,do please stay away from that vehicle,its a moving bomb.Your life is at danger.Keep yourself and your family alive"

--- On Wed, 11/17/10, Joe Subich, W4TV <lists at subich.com> wrote:

From: Joe Subich, W4TV <lists at subich.com>
Subject: Re: [Elecraft] OT (Yamaha Cm 500)
To: n1al at cds1.net
Cc: elecraft at mailman.qth.net
Date: Wednesday, November 17, 2010, 6:19 AM

> What do you think of the idea of adjusting the equalizer so that the
> peak spectrum is flat across the SSB bandwidth?

It's probably a good starting point but I would also listen to the
audio on a second receiver and have it evaluated by someone who can
make critical evaluation off air.

> I ended up with:
>
> 50 Hz   -16 dB
> 100 Hz  -16 dB
> 200 Hz  -16 dB
> 400 Hz  -10 dB
> 800 Hz  -16 dB
> 1.6 kHz   0 dB
> 2.4 kHz  +3 dB
> 3.2 kHz  +6 dB

I think that is doing too much cutting at the low end and not
enough boost at the high end.  Adding 6 dB at each band from
200 Hz to 3.2 KHz would make me more comfortable.  Like, Jim
I prefer to leave 50/100 at -16 regardless as they contribute
nothing to communication.

73,

    ... Joe, W4TV

On 11/16/2010 3:18 PM, Alan Bloom wrote:
> Jim and Joe,
>
> What do you think of the idea of adjusting the equalizer so that the
> peak spectrum is flat across the SSB bandwidth?  With my voice I had to
> considerably attenuate the low audio frequencies and boost the highs to
> achieve that.
>
> There's a way to measure the transmitted spectrum using a P3, as
> described in the most recent version of the Owner's Manual.  I ended up
> with:
>
> 50 Hz   -16 dB
> 100 Hz  -16 dB
> 200 Hz  -16 dB
> 400 Hz  -10 dB
> 800 Hz  -16 dB
> 1.6 kHz   0 dB
> 2.4 kHz  +3 dB
> 3.2 kHz  +6 dB
>
> (The -16 dB at 800 Hz was based on someone's suggestion that little
> voice information occurs around that frequency.  Otherwise it would
> probably have been -3 or -6 dB.)
>
> Al N1AL
>
>
> On Tue, 2010-11-16 at 14:29 -0500, Joe Subich, W4TV wrote:
>>>> Recommended TXEQ for the CM500 is max cut of the two lowest bands,
>>>> somewhere between 6dB cut and max cut of the third band, depending
>>>> on your voice, and flat (0 dB) for the remaining bands.
>>
>> While I agree with Jim on the lowest three bands, I strongly prefer
>> a 3 to 6 dB/octave rising characteristic for the top three bands
>> (e.g., +3, +5, +6 or +6, +10, +12).  The rising characteristic helps
>> considerably with "clarity" and the ability to cut through the crud.
>>
>> 73,
>>
>>      ... Joe, W4TV
>>
>>
>> On 11/16/2010 12:22 PM, Jim Brown wrote:
>>> On 11/15/2010 7:35 PM, Chris Hembree wrote:
>>>> Just got my CM 500 today. Would someone please tell me what the black box with 2AAA batteries is for.
>>>
>>> It's for when you want to use the mic with something that does not
>>> provide voltage for the electret element.  Contrary to what some Yamaha
>>> descriptions says about the mic, it is an electret mic, not a dynamic
>>> mic.  You do NOT need it with a K3. Simply plug it into the rear panel
>>> mic connector, turn on the bias (see the manual), and adjust levels just
>>> like you would with any other mic (again, following the directions in
>>> the manual.
>>>> Plus how do you like the mic on the cm500?
>>>
>>> I love it, and so do most who have used it.  It provides very clean
>>> audio, and, using TXEQ can easily be made very competitive for
>>> contesting and DXing, or more mellow for casual rag chewing. It sounds
>>> better than most Heil mics I've heard.  Recommended TXEQ for the CM500
>>> is max cut of the two lowest bands, somewhere between 6dB cut and max
>>> cut of the third band, depending on your voice, and flat (0 dB) for the
>>> remaining bands. Use the LOW setting for Mic Gain in the Menu.
>>>
>>> 73, Jim K9YC
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>
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