[Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-18 Thread Microsoft Office Outlook
To: Elecraft List Subject: Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT I have several CM500'ds and also a Koss SB40. The Koss SB40 headset is IDENTICAL to the CM500 in design and construction, except in one area: The Mic capsule. The Koss mic capsule is dynamic, not condense

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-18 Thread Jim Brown
On Mon,8/17/2015 11:20 PM, Luis V. Romero wrote: The Audio Technica BPHS1. Its a bit expensive, but it sounds just lovely with its flat response dynamic element. Its way more comfortable than the Heil Elite and the new Pro cans. Its built for sports play-by-play announcing. Hi Lu, AT is a

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-17 Thread Luis V. Romero
I have several CM500'ds and also a Koss SB40. The Koss SB40 headset is IDENTICAL to the CM500 in design and construction, except in one area: The Mic capsule. The Koss mic capsule is dynamic, not condenser. It is also HORRIBLE! I believe it is a cheap earphone soldered up for mic duty. It

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-17 Thread Walter Underwood
I kept planning to build an adaptor to fix it, but didn’t get around to it. Then I drew it out to make sure I know what was going on and it hit me. Very much a case of “laziness is the mother of non-reinvention”. The PTT jack was an unexpected bonus. wunder K6WRU CM87wj http://observer.wunderwo

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-17 Thread Don Wilhelm
wunder, After building an adapter using a TRRS plug for myself, I had a "head-slapping" reaction to your solution. It should work wonders for not only the CM500, but also for most any other microphone designed to be used on a computer - most, if not all, have the tip and ring connected toget

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-16 Thread Walter Underwood
My blog post was mostly about providing clean mic bias with the KX3 for electrets that get bias from both tip and ring, like the Yamaha CM500. Give it a quick read, it might answer some questions. http://observer.wunderwood.org/2015/08/16/yamaha-cm500-headset-with-ptt-on-elecraft-kx3/ wunder K6

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-16 Thread Jim Brown
On Sun,8/16/2015 7:17 PM, Brian Denley wrote: Don't electrets have to be powered (voltage applied) where dynamics do not? Right. On Sun,8/16/2015 8:00 PM, James Wilson wrote: Yes, the electret mics do require a small amount of power - Elecraft and others call it BIAS voltage. It's called bi

[Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-16 Thread James Wilson
Jim, it's true audio quality is very subjective. For good communications quality, I personally judge the three headsets I mentioned to be about equal. Over the ear comfort also compares with my over the ear headphones - a sauna for the ears. :-) Brian, Yes, the electret mics do require a small amo

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-16 Thread Brian Denley
Jim: Don't electrets have to be powered (voltage applied) where dynamics do not? Brian KB1VBF Sent from my iPad > On Aug 16, 2015, at 8:34 PM, Jim Brown wrote: > >> For example, Yamaha's own description of the CM500 called it a dynamic mic, >> while it definitely an electret. > > I suspect t

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-16 Thread Jim Brown
On Sun,8/16/2015 5:12 PM, James Wilson wrote: All three of these are look-alikes and have electret mics and the same wiring and 3.5mm plugs. They sound almost the same plugged into the rear jacks on my K3 (with bias turned on.) No surprise. BUT -- how comfortable are they? Have you worn them f

[Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-16 Thread James Wilson
​There's still another Koss headset - Model KS-45 that's plug-in compatible with the Yamaha CM500. It has an electret mic. Also about $25 on Amazon. Look also at Amazon's listing for a RoverBeats Bravo. Electrically and functionally (and sound) it's interchangeable with the CM500 and - for us REAL

Re: [Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-16 Thread Walter Underwood
I got a quick response from David Anderson, GM4JJJ, that the Koss SB40 has a dynamic mic. Looking at the specs at B&H Photo, I agree. I’ve updated the blog post. wunder K6WRU CM87wj http://observer.wunderwood.org/ (my blog) On Aug 16, 2015, at 1:47 PM, Walter Underwood wrote: > Finally got ar

[Elecraft] KX3: Cleaner audio with Yamaha CM500, also PTT

2015-08-16 Thread Walter Underwood
Finally got around to writing up my simple hack for cleaner mic bias with the KX3 and Yamaha CM500. Along the way, I spotted something that will make all us cheap hams happy. It looks like the Koss SB40 ($25) is the same headset as the Yamaha CM500 ($55). But we really care about the better aud