Hi Mike! You've unknowingly re-invented the somewhat famous SKYTEC CW-1 speaker, made in Ukiah, CA a number of years ago. It uses a sliding tube to establish resonance.
FWIW, I have a couple of them. 73! Ken Kopp - K0PP On Wed, Oct 2, 2019 at 12:19 PM Mike Maloney <[email protected]> wrote: > Getting a nice boost from the stock speaker (MON level 2) at my preferred > pitch of 500Hz. Booster is a 12-3/4 inch piece of 1-1/4" PVC tube > (1-5/8"OD) with one end cut at 30 deg. Placed approx. 1/8 inch from the > speaker holes gives the best gain. Tube would be slightlyshorter for > higher pitch tone. Easy to find the peak by swinging the pitch tone. A > slider sleeveon the end allows adjusting to desired pitch. For CW ops it > is really nice having the additionalaudio boost at your preferred pitch. > I pass this on FYI to those who may like to try it themselves. > 73, > Mike AC5P > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
