[Elecraft] K4 Headphones Q

[E.H. Russell]

There are newer headsets claiming 40ms latency, but the host must support
the LL format. My estimate for the QC-35 which uses the ATX format is in the
range of 150-250ms. This may not be a problem at slower CW speeds for some
folks, but I couldn't tolerate it.

ED / W2RF




-----Original Message-----
From: Rajiv Dewan <rdewan at me.com> 
Sent: Wednesday, October 14, 2020 11:45 AM
To: E.H. Russell <ehr at qrv.com>
Cc: Jim Miller <jim at jtmiller.com>; Jim McDonald <jim at n7us.net>;
elecraft at mailman.qth.net
Subject: Re: [Elecraft] K4 Headphones Q

After reading a positive review and to reduces wires at my operating
position, I connected a bluetooth transmitter to my K3/0 and tried a
bluetooth headset.   The latency was so bad that I just could not send cw
using my paddles.  I attached a wire to the headphones and the problem went
away.  

Transmitter: Taotronics BA014, Headphones: Sony WH-1000XM3

Raj

> On Oct 14, 2020, at 11:31 AM, E.H. Russell <ehr at qrv.com> wrote:
> 
> Wireless introduces latency, wired does not. Definitely use wired for CW.
> 
> ED / W2RF
> 
> 
> 
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> <elecraft-bounces at mailman.qth.net> On Behalf Of Jim Miller
> Sent: Wednesday, October 14, 2020 11:13 AM
> To: Jim McDonald <jim at n7us.net>
> Cc: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K4 Headphones Q
> 
> How about latency for CW either wired or wireless?
> 
> How do you deal with battery life in contesting?
> 
> Stay safe!
> 
> Jim ab3cv
> 
> On Wed, Oct 14, 2020 at 10:35 AM Jim McDonald <jim at n7us.net> wrote:
> 
>> Over the ear - very comfortable.
>> 
>> Top rated (87) by Consumer Reports - tied with the new model.
>> 
>> 73,  Jim N7US
>> 
>> -----Original Message-----
>> 
>> Do the QC-35 rest on your ear or are they over the ear?
>> 
>> Rich - N5ZC
>> 
>> On 10/14/2020 7:59 AM, Jim McDonald wrote:
>>> I just bought a pair yesterday at a closeout price of $170 from my 
>>> local
>> Costco.  They have been discontinued.  Costco online is now out of 
>> stock, but some stores still have them.  Amazon has them for $199 now.
>>> 
>>> My favorite headphones up to now has been Sennheiser HD 280 PRO but
>> these sound great and eliminate the noise from my KPA1500 with the 
>> fan on
>> #2 and a nearby water heater fan.  No comparison with my old QC2
> headphones.
>>> 
>>> 73,  Jim N7US
>>> 
>>> -----Original Message-----
>>> 
>>> 
>>> I also use a QC-35. When plugged in with a cord, the power must be 
>>> on
>> for the noise cancelling to work. That also turns on the DSP which 
>> greatly improves audio quality.
>>> 
>>> ED / W2RF
>>> 
>>> 
>>> 
>>> 
>>> -----Original Message-----
>>> 
>>> Jim,
>>> 
>>> I only use my Bose QC-35 when:
>>> 
>>> 1. on the cell phone.
>>> 2. mowing the yard/tuning my motorcycle 3. whenever using the K3 & 
>>> K3s.
>>> 
>>> The noise cancelling works perfectly with the blower from the Alpha 
>>> 77SX right next to me, I only hear what is coming in from the radio.
>>> Why your
>>> QC-35 does not noise cancel when attached via cord is not normal, 
>>> mine
>> is a Godsend.
>>> 
>>> 73,
>>> 
>>> Gary
>>> KA1J
>>> 
>>>> I have Bose QC-35 headphones. Noise canceling does not work on any 
>>>> radio when you use the cord. Headphones work well with a Bluetooth 
>>>> connection.What kind of device do I use, if and when my K4 is 
>>>> delivered?Also on the K4 can a USB port expander be used on the K4 
>>>> with multiple devices and what is the K4 limited  to?Jim K9TFSent 
>>>> from my T-Mobile 4G LTE Device
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