[Elecraft] K4 Headphones Q

[Jim McDonald]

The rechargeable battery with noise cancelling on and Bluetooth off is rated at 40 hours.  It uses the same USB charging plug as my Logitech keyboard, so I have a charging cable on my desk.

I connect to my K3S with the cable, which is inadequate.  It's 4' long, lightweight, and flimsy.  The jack on the headphones is a sub-mini, 2.5mm, and the other end is a mini-phone plug, 2.5mm.  Amazon has several replacement cables that are heavier and designed for these headphones.

73,  Jim N7US

-----Original Message-----

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