[Elecraft] Cheap headphones

[Jay]

Thanks for that .. TAP 1....now I see the ALC fluctuating and not 
"pinned"...

----- Original Message ----- 
From: "Eric Swartz - WA6HHQ, Elecraft" <eric at elecraft.com>
To: "Jay" <pcb4u at verizon.net>
Cc: "Elecraft reflector" <Elecraft at mailman.qth.net>
Sent: Tuesday, April 09, 2013 2:48 PM
Subject: Re: [Elecraft] Cheap headphones


> Try setting the K3's mic gain menu setting to 'low'.
>
> Eric
> elecraft.com
>
> On 4/9/2013 9:49 AM, Jay wrote:
>> I just got a CM500 yesterday for testing and would say the MIC is quite 
>> sensitive..only takes a MIC setting of 4-6 and its fine...increasing MIC 
>> gain apparently does nothing but increase feedback. I guess these powered 
>> headset are different than the usual Heil Pro line as one can move the 
>> MIC gain up and down for a Heil and watch the ALC go higher or lower.
>>
>> The K3 ALC using the CM500 (at least here) remains constantly at about 
>> 6-7 bars (compression set at about 10-12 for best overall performance so 
>> far)
>>
>> The ear cover is complete not like my Heil Pro
>>
>> I also like the strap across the head. The Heil has some cushion over 
>> some type of strap that after a while it's noticeable. The CM500 has a 
>> net like strap that is not hard, also allows air to move so no apparent 
>> sweat build up after a 5 hour stint in 95 degree weather.
>>
>> Took a lot of antivox and TX gate to quiet the feedback down during RX 
>> modes ( I may have to take a footswitch for a multi op site)
>>
>> Settings were : MIC rpl, impedance L (tap 1) , bias on (tap 2)
>>
>> A nice 9 foot long card, plugs right in to rear panel, no adapters needed 
>> (less to fail when on the road) , makes things easy when traveling with 
>> the K3.
>>
>>
>>
>>
>> ----- Original Message ----- From: "Michael Usher AG6MK" 
>> <ag6mk at muszka.com>
>> To: "Fabio IZ4AFW / NZ1W" <iz4afw at iz4afw.org>
>> Cc: "Tom Boucher" <tom at telemetry.demon.co.uk>; "Elecraft reflector" 
>> <Elecraft at mailman.qth.net>
>> Sent: Tuesday, April 09, 2013 9:24 AM
>> Subject: Re: [Elecraft] Cheap headphones
>>
>>
>> They look to be virtually the same headset.
>>
>> Visually, the earcups and headband are identical.  The mic boom looks to 
>> be physically slightly different.  And the Koss has single side cable, vs 
>> dual on CM500.
>>
>> The CM500 I have has "Koss" molded on the 3.5mm connectors.
>>
>> From website specs, the Koss has lower impedance (100 vs 120) and 
>> slightly better sensitivity.
>>
>> My bet is that the Koss would be a slight improvement on the CM500.
>>
>> Michael
>> AG6MK
>>
>>
>> On Apr 9, 2013, at 5:58 AM, "Fabio IZ4AFW / NZ1W" <iz4afw at iz4afw.org> 
>> wrote:
>>
>>> If anyone in EU decides to make a group buy of some CM500 headphones,
>>> please let me know, I am interested in buying one.
>>> I already have one for my K3 but another one would be welcome!
>>>
>>> Thanks
>>> Fabio
>>> IZ4AFW / NZ1W
>>>
>>>
>>> 2013/4/9 Tom Boucher <tom at telemetry.demon.co.uk>
>>>
>>>> Dave G3TJP,
>>>>
>>>> Re your post on non-availability of cheap headphones, the Yamaha CM500 
>>>> is
>>>> undoubtedly a preferred choice but is unavailable in Europe - the US
>>>> suppliers won't ship it to Eu either. A good alternative I found for my 
>>>> K3,
>>>> is the Koss SB/45, which is quite comfortable during long periods of
>>>> contest operation and has an excellent quality electret mic. It's 
>>>> currently
>>>> £20.98 free postage on Amazon.
>>>>
>>>> 73
>>>> Tom G3OLB
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