[CW] Resonant CW Speaker

[Benny Owens]

APPEARS TO BE 1/8"

On Mon, Feb 6, 2017 at 7:32 PM, stan levandowski <sjl219 at optonline.net> wrote:
> Is the hole in your "number 5"  one-eighth inch or larger?  Yes, the volume
> gets a little louder with a slight tilt but unless the room is absolutely
> quiet I can't hear it from more than a couple feet away.  And yes, the CW
> certainly pops out. I'll keep experimenting until I get it right because I
> think it will be worth it.
>
>
> 73, Stan WB2LQF
>
>
> On Mon, Feb 06, 2017 at 07:14 PM, Benny Owens wrote:
>
>> STAN
>>
>> BILL GAVE ME SERIAL NUMBER 5 OF THOSE SPEAKERS.  IT IS AMAZING BUT I
>> NOTICED IF I TILTED IT TOWARD ME THE VOLUME INCREASED.  I HAD SOME OLD
>> QSL CARDS FROM A PAST QTH AND TAPED ONE AROUND THE TOP AND SIDES OF
>> THE PVC ELBOW AND IT SOUNDS NIGHT AND DAY LOUDER.  I HAVE BEEN USING
>> IT FOR ALMOST A YEAR NOW AND LOVE IT.
>>
>> 73
>> BENNY K5KV
>>
>> On Mon, Feb 6, 2017 at 4:54 PM, stan levandowski  wrote:
>>>
>>> I built the resonant speaker in the current QST.  It "works" in that I
>>> certainly hear the "peak" with my 600 Hz sidetone and I can tune a CW
>>> signal
>>> and hear that "peak" also.  However, there is NOT ENOUGH VOLUME.
>>>
>>>
>>> I used the exact parts that the author used; ordered them all "fresh"
>>> from
>>> Amazon so no "junk" from the junkbox was implicated.
>>>
>>>
>>> I figured I had screwed up, so I built a second one, thinking I might
>>> have a
>>> speaker anomaly.  The second speaker was the exact same speaker called
>>> for
>>> in the article also.  Same exact results.  If I screwed up at least I was
>>> consistent ;-)
>>>
>>>
>>> If anyone builds a resonant speaker that produces sufficient volume, I'd
>>> like to get in on the details.
>>>
>>>
>>> Clearly, I see where resonance has value but I just can't get the volume
>>> I
>>> need.
>>>
>>>
>>> I now wonder if the 1/8" centered hole in the plastic was suspect since
>>> the
>>> recently posted Youtube video clearly had something on the order of 1/4"
>>> or
>>> larger.
>>>
>>>
>>> 73, Stan WB2LQF
>>>
>>>
>>> On Mon, Feb 06, 2017 at 04:11 PM, Howard wrote:
>>>
>>>> Steve Weber also has a really easy to build resonant speaker that
>>>> might prove interesting to some.
>>>>
>>>> http://kd1jv.qrpradio.com/resonatespkr/CWSPKR.HTM
>>>>
>>>> I built mine a few years ago, and am pleased not only with its
>>>> performance, but with its looks as well!
>>>>
>>>> 73 de W2AFD
>>>>
>>>> On Fri, Feb 3, 2017 at 8:52 PM, D.J.J. Ring, Jr.  wrote:
>>>>>
>>>>>
>>>>> I watched a few of the YouTube videos, this one seemed most
>>>>> informative.
>>>>>
>>>>> Steve Ellington, N4LQ has a SkyTec speaker which he dissects and shows
>>>>> you the secrets inside.  He also explains the principles of these
>>>>> resonant tube speakers.
>>>>>
>>>>> https://www.youtube.com/watch?v=MF8bk6958Hg
>>>>>
>>>>> Bravo, Steve, very well done.  Thanks for sharing!
>>>>>
>>>>> 73
>>>>> David N1EA
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