Ok, thanks. Until we get a schematic, I guess it's a bit of guesswork.
On Feb 20, 2008 12:23 PM, Gil Stacy <[EMAIL PROTECTED]> wrote: > Mike, > > The center tap may not be for the oscillator. For instance in the > 39/49/59's the ferrite bar has 5 leads as well. Two connect the short coil > to the long coil in series. Two leads are the far ends of the connected > coils and these go across the variable capacitor. I assume the M37 is > varcator diode driven to introduce capacitance. The smaller coil is moved > along the ferrite bar to fine tune inductance for proper matching to ensure > tracking. The tapped lead is most likely there to keep signal load down and > goes directly to AM RF pin. ( Until I hear a better theory. Transformer for > impedance match?). > In the analogs above, the Oscillator coil is an IF can, L3. > > 73 Gil > > _______________________________________________ > IRCA mailing list > IRCA@hard-core-dx.com > 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: irca@hard-core-dx.com > > -- Mesa Mike LA de NM _______________________________________________ IRCA mailing list IRCA@hard-core-dx.com 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: irca@hard-core-dx.com
