Well as a hobbyist with a desire to better understand this stuff, that certainly held my interest. How some of those capacitors provide a blocking function went by a little quick for me. I’ll have to go back and stare at the schematic for a bit. Thanks for the lesson. I learned some things.
Would the same principle apply in an AF circuit? I'm looking to service my Philco T-9 Trans-world portable radio this year so this video has helped further my limited knowledge of RF best practices. Thank you for making and sharing.
No you do not need to worry about using metal film anywhere in an audio circuit. Only in a resonant circuit. This was explained during the schematic portion of the video. Maybe give that section a watch again so you know how to apply this rule better. Cheers and good luck.
Just started watching your videos and find them extremely helpful as I learn about restoring old receivers. When referring to "rf" while you were discussing when to use film versus OX/OY type resistors, are you also including the rf part of receivers too (just curious as your example was a transmitter).
Carbon / Metal film are the same. They are spiral cut and not suitable for use in an RF circuit. You can use them in your radio, just make sure they are not passing RF or a direct part of an RF circuit as I have shown on the schematic.
What about carbon film you can still get them they can be used instead of carbon composite? You made a mistake you said 10% silver yes and then said 1% gold that's not correct its 5% red is 1%
@@MikesRadioRepairRestoration we both got it wrong lol I don't remember you mention anything about carbon film I looked again can't see anything about carbon film
Folks, you need to watch and understand all of this video. Skip over parts and you will miss the main take away.
Lots of good info here, gonna have to watch this one a few more times to make sure I have it right.
Great video Mike didn't know metal film were inductive.
Thank you Mike for the effort you put in to our education. Very good educational video. Kind regards.
Thanks Mike.
Well as a hobbyist with a desire to better understand this stuff, that certainly held my interest. How some of those capacitors provide a blocking function went by a little quick for me. I’ll have to go back and stare at the schematic for a bit. Thanks for the lesson. I learned some things.
What does the capacitor do? It shunts RF elsewhere ... to ground usually. So there is really no RF present past the cap. Ok?
mike great video and I really like Ohmite older power resistors and I like the older Dale resistors too.
Thanks
Where do you purchase the OX/OY Resistors, I have a hard time finding them.
Hey San, you can get them from Mouser. They list and stock them. Cheers.
Would the same principle apply in an AF circuit?
I'm looking to service my Philco T-9 Trans-world portable radio this year so this video has helped further my limited knowledge of RF best practices. Thank you for making and sharing.
No you do not need to worry about using metal film anywhere in an audio circuit. Only in a resonant circuit. This was explained during the schematic portion of the video. Maybe give that section a watch again so you know how to apply this rule better. Cheers and good luck.
@MikesRadioRepairRestoration Thanks, Mike 😊
Just started watching your videos and find them extremely helpful as I learn about restoring old receivers. When referring to "rf" while you were discussing when to use film versus OX/OY type resistors, are you also including the rf part of receivers too (just curious as your example was a transmitter).
Just resistors that have radio frequency (RF) moving through them. In a receiver or transmitter.
What about Carbon Film Resistors, are those ok for radios. I use them on everything.
Carbon / Metal film are the same. They are spiral cut and not suitable for use in an RF circuit. You can use them in your radio, just make sure they are not passing RF or a direct part of an RF circuit as I have shown on the schematic.
thanks@@MikesRadioRepairRestoration
What about carbon film you can still get them they can be used instead of carbon composite?
You made a mistake you said 10% silver yes and then said 1% gold that's not correct its 5% red is 1%
No carbon film may not be used in an RF circuit. Please re-watch the video in its entirety. Red is 2% not 1%. Brown is 1%.
@@MikesRadioRepairRestoration we both got it wrong lol I don't remember you mention anything about carbon film I looked again can't see anything about carbon film
@@jedi-mic Carbon film and metal film are one in the same. They are both spiral cut.