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Mike Osc AM radio transmitter?
TV MAN
Phorum Expert
*****
Posts: 1,130
Threads: 78
Joined: Jan 2014
City: Annapolis, IL
#11

02-17-2018, 07:37 PM
Been experimenting with this some. I don't really note any change in sound quality by changing the value of the input cap. I am getting some kind of drift tho. I think that 2.5k resistor is heating things under the chassis and causing something to change, so I connected a sub outside of the chassis. This is keeping things much cooler inside, but now I have this really hot resistor hanging off the chassis somewhere. Any thoughts of subbing a zener or series of those to drop the B+ from 130v down to around 3v? Need to find something workable, but with some kind of protection for those tubes filaments.
If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44
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Messages In This Thread
Mike Osc AM radio transmitter? - by TV MAN - 01-29-2018, 06:57 PM
RE: Mike Osc AM radio transmitter? - by Arran - 01-30-2018, 05:52 AM
RE: Mike Osc AM radio transmitter? - by David - 02-01-2018, 10:29 AM
RE: Mike Osc AM radio transmitter? - by TV MAN - 02-01-2018, 04:03 PM
RE: Mike Osc AM radio transmitter? - by Arran - 02-01-2018, 11:04 PM
RE: Mike Osc AM radio transmitter? - by TV MAN - 02-15-2018, 12:35 PM
RE: Mike Osc AM radio transmitter? - by TV MAN - 02-15-2018, 12:55 PM
RE: Mike Osc AM radio transmitter? - by TV MAN - 02-15-2018, 11:43 PM
RE: Mike Osc AM radio transmitter? - by TV MAN - 02-17-2018, 07:37 PM
RE: Mike Osc AM radio transmitter? - by 35Z5 - 02-23-2018, 12:03 PM
RE: Mike Osc AM radio transmitter? - by TV MAN - 02-23-2018, 08:37 PM
RE: Mike Osc AM radio transmitter? - by 35Z5 - 02-23-2018, 10:28 PM
RE: Mike Osc AM radio transmitter? - by TV MAN - 02-24-2018, 03:05 PM
RE: Mike Osc AM radio transmitter? - by TV MAN - 02-24-2018, 07:01 PM



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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)