Two Northern Electric Baby Champ Tube Radios Video #6 - IF Frequency Interference Investigation

I've become interested in the effect of interference signals at the IF frequency 'leaking' through the radio from the antenna to be heard from the speaker. This radio presents an opportunity to further investigate this undesirable effect.

[@Studyelectron]

Learning a joy by itself even when you are all alone,music always cheers all around to review and view the words worth ,to fine treat to all🎉

[@jamesmdeluca]

Greetings:
Still on the Baby Champ NE5002 MW & SW radio.
You have the signal generator putting out 455 KHz. ?
Change those 3 caps.

[@truthreigns7]

Hello Mr Jim

[@randomsteve4288]

15:19 You can significantly reduce external IF pickup by using a trap filter in the path from antenna to tuned antenna circuit, or if a ferrite rod is used, between the output of the tuned RF and the mixer tube.
Almost any european radio after WW2 made use of that. And if you had done the alignments on the german radios you "fixed" by the book, you would have known for setting the trap is the last step in the RF/LO alignment.
Go watch Electronics old and new to see how its done.

[@hestheMaster]

Hum can also come from way out of tolerance carbon comp resistors in the RF or IF stages. Sometimes a weak tube also
can cause hum. Check the whole radio out for these conditions, as it is always the best service technique on a radio that is
this old. Duh.