I've seen at Walmart they have modern vinyl covered extension cords that have an outer layer of 2 tone cloth wrapped around the vinyl and picked up a few to use as line cord for about 6 dollars each for 8ft cords.
I just wish new caps had their value on them like old ones did, and a line to indicate the foil end. Yeah, they have conversion charts but I'm just lazy I guess, lol. I'll have to check out Sal's site as the last time I ordered caps in bulk a couple years ago was through Justradios up in Canada and I think the minimum was somewhere around $75.00 worth of caps.
Hi Michael, this radio probably is different than the one you have because, as far as I can tell, someone has resided it to use a 50B5 output tube rather than the 50C5. The other possible difference is that I have found two different schematics for this radio, one with a B- circuit and one without. I apologize for not finishing the video series, but the radio is sitting on my bench just as I left it. In the next one, I’ll try to address some of the differences. Thanks for watching.
You are correct, West. That is a 330 picofarad mica capacitor in a ceramic enclosure. I’ll talk more about that in a following video. Thanks for watching.
Hi Michael, ceramic caps are not manufactured in the same fashion as foil capacitors. Generally speaking, a ceramic capacitor is made up of two electrodes separated by a flat ceramic dielectric. There is no outside foil to reference. Regarding modem foil capacitors, the outside foil lead is not marked and special gear is required to detect the outside foil. Don at RestoreOldRadios designed an outside foil detector. You should check out his channel.
Michael, I am not sure what you’re asking. If you are replacing one ceramic capacitor with another ceramic capacitor, then the polarity doesn’t matter. Polarity only matters with electrolytic capacitors, and you cannot substitute a ceramic capacitor for an electrolytic capacitor. I hope that answers your question.
We’ll, tube-dude, you’re sort of right. In the olden days, the outside foil would act as a fair noise shield, which was important on high-end, high fidelity radios. Today’s modern caps offer very little shielding even if you can identify the outside foil. Don at RestoreOldRadios found an instance where it did make a noticeable difference. But, I maintain that for our little GE AA5, you won’t be able to demonstrate that it reduces the noise to any detectable level. So, yes, it can matter, but mostly it doesn’t.
Thank you for another related and informative video.
I've seen at Walmart they have modern vinyl covered extension cords that have an outer layer of 2 tone cloth wrapped around the vinyl and picked up a few to use as line cord for about 6 dollars each for 8ft cords.
Nice find! I’ll have to check it out.
I just wish new caps had their value on them like old ones did, and a line to indicate the foil end. Yeah, they have conversion charts but I'm just lazy I guess, lol. I'll have to check out Sal's site as the last time I ordered caps in bulk a couple years ago was through Justradios up in Canada and I think the minimum was somewhere around $75.00 worth of caps.
I'm working on one of these right now and there are so many differences from what I see here.
Hi Michael, this radio probably is different than the one you have because, as far as I can tell, someone has resided it to use a 50B5 output tube rather than the 50C5. The other possible difference is that I have found two different schematics for this radio, one with a B- circuit and one without. I apologize for not finishing the video series, but the radio is sitting on my bench just as I left it. In the next one, I’ll try to address some of the differences. Thanks for watching.
Sorry, should have said “rewired.”
What is the white one at the bottom right corner? It looks like a capacitor and is marked 330MMF.
You are correct, West. That is a 330 picofarad mica capacitor in a ceramic enclosure. I’ll talk more about that in a following video. Thanks for watching.
With a modern cap they have an outer foil which is the outer foil on ceramic.
Hi Michael, ceramic caps are not manufactured in the same fashion as foil capacitors. Generally speaking, a ceramic capacitor is made up of two electrodes separated by a flat ceramic dielectric. There is no outside foil to reference. Regarding modem foil capacitors, the outside foil lead is not marked and special gear is required to detect the outside foil. Don at RestoreOldRadios designed an outside foil detector. You should check out his channel.
I ask if replaced with ceramic how will i know the polarity of the cap.
Michael, I am not sure what you’re asking. If you are replacing one ceramic capacitor with another ceramic capacitor, then the polarity doesn’t matter. Polarity only matters with electrolytic capacitors, and you cannot substitute a ceramic capacitor for an electrolytic capacitor. I hope that answers your question.
At 6:45 *WRONG!* On tube equipment, the direction of the Foil side DOES make a difference!
We’ll, tube-dude, you’re sort of right. In the olden days, the outside foil would act as a fair noise shield, which was important on high-end, high fidelity radios. Today’s modern caps offer very little shielding even if you can identify the outside foil. Don at RestoreOldRadios found an instance where it did make a noticeable difference. But, I maintain that for our little GE AA5, you won’t be able to demonstrate that it reduces the noise to any detectable level. So, yes, it can matter, but mostly it doesn’t.
Not on new mass-produced caps. This equipment is nowhere near sensitive enough to hear a difference.