Charles, A very interesting suggestion as to Wobbler cause.
I'm listening to an Xtreme 1100 Wobbler right now at 10:07 pm ET, Feb 17 2007 (0307Z). I have audio from WTAM Cleveland, OH, on 1100, but a weaker carrier on 1098.01 kHz, which could account for the Wobbler. It is generally accepted that many Cuban transmitters are old and in ill repair. This would all certainly seem to meet your suggested criteria. Conditions tonight are such that audio from Radio Cadena Habana is not being heard, though in the past it usually has been. The next time RCH is in strong and Wobbling, I'll be better able to determine it's carrier frequency without doubt. Your suggestion is possibly the best proposed Wobbler cause so far. Previously, the combination of bad power regulation and old equipment had seemed the most likely culprits, but still with no technical explanation of why they would cause a Wobbler. You may have added that missing element. Thanks, Curt ------- W. Curt Deegan Boca Raton, (southeast) Florida http://ScooterHound.com/WWWR/wobbler At 09:25 AM 2/17/2007, you wrote: >I see a possible causes for the Wobblers. > >It's common among tube-type transmitters that, when the oscillator tube >reaches the end of its useful life (when the transconductance drops below X >micro-mhos), the inherent feedback inside the transmitter will cause the >transmitter to "take off" and oscillate at some frequency near the assigned >frequency. The station will sound about normal, but the carrier frequency >will be a few kHz off and "wobbulate," or vary with a frequency-modulated >characteristic caused mainly by bass components of the audio modulation. > >If the 1100 Wobbler kicks down at its extreme frequency deviations, betcha >it'll pop up FMing a few kHz from 1100. > >Jest mah opinion. Take it or leave it, sez I. > >Charles > > > ----- >Charles A Taylor, WD4INP >Greenville, North Carolina _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
