Hi Folks,
I bought an old phonograph at an estate sale last week. It was really out of sorts, part of a grab bag I bought for three dollars. I wasn't expecting much, just thought I could pick a couple of circuits up to practice on.
The phono at the center of this post had had its entire component cadre remove. There was nothing under the table but the tube sockets. The tubes where there but that was about all. One was a 50L6GT and the other was a 35Z5GT.
I found the schematic and looked at what was missing. There was a 500K resistor, a 40 "MF" Cap and two 20 "MF" Caps and a lot more various bits and pieces and their connection to the tubes and beyond.
In the middle of my perusal and my subsequent realization that once again I was about to embark on another journey aboard the Good Ship BOM with my shipmate Ensign Digikey, I realized that I didn't know how to order components from a schematic that only offered each one's value without any notation about what power they needed to be. I had that all too familiar feeling that the lack of experience that has plagued my every step in this addiction was once again rearing it ugly head. Why, I again queried myself, had I not studied Electronic Engineering and not Social Engineering. I secretly knew the answer to that haunted question but had a hard time articulating it..... the secret was....I had a hard time adding 2+2 and coming up with a number close to four.
So.......Just how do you order missing components without their power indicated on the schematic? Just to be clear: I see each components value, but no indication of the power they need. If the answer is beyond 4 please explain slowly.
As so many have said before me ...... Thanks for your help!
Dave Lowa
I bought an old phonograph at an estate sale last week. It was really out of sorts, part of a grab bag I bought for three dollars. I wasn't expecting much, just thought I could pick a couple of circuits up to practice on.
The phono at the center of this post had had its entire component cadre remove. There was nothing under the table but the tube sockets. The tubes where there but that was about all. One was a 50L6GT and the other was a 35Z5GT.
I found the schematic and looked at what was missing. There was a 500K resistor, a 40 "MF" Cap and two 20 "MF" Caps and a lot more various bits and pieces and their connection to the tubes and beyond.
In the middle of my perusal and my subsequent realization that once again I was about to embark on another journey aboard the Good Ship BOM with my shipmate Ensign Digikey, I realized that I didn't know how to order components from a schematic that only offered each one's value without any notation about what power they needed to be. I had that all too familiar feeling that the lack of experience that has plagued my every step in this addiction was once again rearing it ugly head. Why, I again queried myself, had I not studied Electronic Engineering and not Social Engineering. I secretly knew the answer to that haunted question but had a hard time articulating it..... the secret was....I had a hard time adding 2+2 and coming up with a number close to four.
So.......Just how do you order missing components without their power indicated on the schematic? Just to be clear: I see each components value, but no indication of the power they need. If the answer is beyond 4 please explain slowly.
As so many have said before me ...... Thanks for your help!
Dave Lowa