Topband: Topband Digest, Vol 278, Issue 2

[David Raymond]

Dennis. . .there is another CW speaker owner using an Elecraft K4D.  He 
has shared his findings with me over the past few month and has results 
similar to mine.  I will let him share further information if he desires.

73 for now. . . Dave, W0FLS

On 2/7/2026 12:25 PM, Dennis W0JX via Topband wrote:
>   I wonder if this effect exists in HYBRID receivers such as the Yaesu FTDX-101 and also the K4HD?
> Incidentally, the tuned speaker is an old concept. There is a guy in TX that has been building them for years with PVC tubing. Only problem is that his resonanted around 750 HZ. Even 600+ sound high when I'm used to around 420 Hz or so.
> 73 Dennis W0JX
>     .
> _________________
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