[CW] Resonant CW Speaker

[stan levandowski]

Joe, I never even considered this!  Thanks for the heads-up.  I'll check 
it out.


73, Stan WB2LQF


On Mon, Feb 06, 2017 at 08:16 PM, Joe wrote:

> Hello, Stan.
>
> I have not built this particular one, but in the past, I have built a 
> few for friends and myself. The low volume complaints I found came
> from folks using their earphone jacks.  Most radios today have the 
> earphone jack's audio padded down for ear protection.  Once they
> moved the their plugs over to their speaker jacks,  their audio level 
> was plenty high enough.  There are/was a couple of radios that
> had switches go between earphones and speaker which was a padder 
> switch.
>
>
> On 2/6/2017 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
>
> -- 
> Regards, Joe, K8JP/V31JP, Ronnie, Marty & Sidney Pontek
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