I completed my restoration of this console radio and I noticed that the 3 position Tone Control doesn't seem quite right. In the "first" position after you turn on the radio the tone is lets say bright. Then in the second position, there isn't any change in the tone. Then in the third position, there is a marked difference with the tone being lower and a lot less "noisy". Is this normal? It seems there should be a difference between all 3 positions. Tone control is #39 in the attached schematics.
Schematics are attached.
Crist
(This post was last modified: 03-23-2018, 10:30 AM by Crist Rigotti.)
Crist looks like the control is showing only two connections when you switch it. 1st pos. the .006 cap is in circuit. 2nd pos. no connection and 3rd pos. .008 and .03 cap in circuit. Maybe someone can explain further about why its noisy in pos 3.
The 1st position the set is off so it doesn't effect on the tone.
Position 2 looks like it would be the normal position as it doesn't have any high frequency cut .
#3 has a slight bass boost.
#4 has a lot of high rolloff.
Would check the obvious suspects if it's not working. Tone sw contracts, proper connections, and the tap on the volume isn't open.
GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
(This post was last modified: 03-23-2018, 07:19 PM by Radioroslyn.)
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
