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Sparks Withington 581X
#13

(04-09-2017, 07:27 PM)Mondial Wrote:  Don't worry about that IF rejection coil. You can just remove it completely.

The original purpose of L1 and C3 was to serve as a trap to eliminate interference from high power marine radio stations which were in operation at the time when the radio was built. These stations operated in the LF band at frequencies around 400-500 kHz, and could cause interference at the IF frequency when picked up by the antenna. Today these stations no longer exist, and therefore the rejection circuit is no longer needed.

Thank you very much, friend!  I'd never heard of that coil before, I appreciate the explanation.  More pics as I progress.  Joe

Joe

Matthew 16:26 "For what does it profit a man if he gain the whole world, yet lose his own soul?"


Messages In This Thread
Sparks Withington 581X - by Joe Rossi - 11-04-2016, 09:55 PM
RE: Sparks Withington 581X - by klondike98 - 11-05-2016, 09:32 AM
RE: Sparks Withington 581X - by Paul Philco322 - 11-05-2016, 10:53 AM
RE: Sparks Withington 581X - by Joe Rossi - 11-05-2016, 11:29 AM
RE: Sparks Withington 581X - by OldRestorer - 11-06-2016, 07:17 PM
RE: Sparks Withington 581X - by Arran - 11-07-2016, 05:05 AM
RE: Sparks Withington 581X - by Joe Rossi - 11-07-2016, 10:19 PM
RE: Sparks Withington 581X - by Paul Philco322 - 11-07-2016, 10:47 PM
RE: Sparks Withington 581X - by Arran - 11-08-2016, 06:18 AM
RE: Sparks Withington 581X - by Joe Rossi - 11-08-2016, 09:52 AM
RE: Sparks Withington 581X - by Joe Rossi - 04-09-2017, 06:20 PM
RE: Sparks Withington 581X - by Mondial - 04-09-2017, 07:27 PM
RE: Sparks Withington 581X - by Joe Rossi - 04-09-2017, 08:33 PM
RE: Sparks Withington 581X - by Arran - 04-10-2017, 04:00 AM
RE: Sparks Withington 581X - by Joe Rossi - 04-10-2017, 08:22 PM
RE: Sparks Withington 581X - by Joe Rossi - 10-21-2017, 06:17 PM



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