tag:blogger.com,1999:blog-7590176649168185428.post7385495401707346638..comments2024-03-28T08:01:27.111-04:00Comments on SolderSmoke Daily News: A 12AU7 Atop a Raspberry PiBill Mearahttp://www.blogger.com/profile/07662500663603350847noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7590176649168185428.post-16874074450997698312016-05-10T21:52:48.804-04:002016-05-10T21:52:48.804-04:00I wonder if this circuit would adapt to using a 12...I wonder if this circuit would adapt to using a 12AF6 tube. It is the same pin-out as the 12AU6 (pentode) but uses just 12 volts on the plate. A bit lower transconductance, but using headphones it should prove to be doable. This would make an interesting hack. Bruce - KK0S Bruce - KK0Shttps://www.blogger.com/profile/07111415158794117864noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-85625243894505521382016-05-10T08:32:12.553-04:002016-05-10T08:32:12.553-04:00Thanks Doug. I see the Hallicrafters SX-100 does a...Thanks Doug. I see the Hallicrafters SX-100 does as well. Google shows circuits to convert Raspberry Pi audio to phono input. Anonymoushttps://www.blogger.com/profile/05088714178231290594noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-13061854290169072182016-05-09T12:08:08.387-04:002016-05-09T12:08:08.387-04:00I have a early 50's Hallicrafters S-53A that h...I have a early 50's Hallicrafters S-53A that has a phono input jack in the back. It is switched in by turning the RF Gain control all the way CCW.<br />Doug - W8NFTAnonymoushttps://www.blogger.com/profile/09173555704887662952noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-90858350808050167532016-05-09T09:37:22.442-04:002016-05-09T09:37:22.442-04:00Forgot this is the literal internet. Just kidding ...Forgot this is the literal internet. Just kidding about the 60 Hz.Anonymoushttps://www.blogger.com/profile/05088714178231290594noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-6258753867116459342016-05-09T09:14:45.611-04:002016-05-09T09:14:45.611-04:00It's all about the warm glow of the tubes and ...It's all about the warm glow of the tubes and the slight 60 Hz hum which in known to enhance any content. Look for an old AM broadcast radio at a garage sale with a low level "phono" input and see for yourself. I wonder if any vintage ham rcvrs have a phono input? <br />Bob<br />wm6h Anonymoushttps://www.blogger.com/profile/05088714178231290594noreply@blogger.com