Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Philco 41-608. Correct wiring of bass control
#1

Hi,
I am replacing the bass control (6.0Meg) on this chassis and I'm not sure which components were connected to which ends. The wiper of the pot is at ground. I want to make sure my bass is increasing as the pot is rotated clockwise. So should the wiper end then be going to the upper or lower end (looking at the schematic) as you increase the bass tone? Another way of putting it is should the .004 cap from the plate of the 7C6 become grounded (via the wiper) when bass is maximum or minimum?
Hope this isn't too confusing.. just want to get it right... lost track of which leads were on which end.
Thanks very muich!
Harlan Icon_biggrin
#2

OK, assuming you are looking at the back side of the pot...

Connect capacitor (65), .004 uF, to the left terminal.
Ground to the center terminal.
The right terminal to the junction of capacitor (56) and resistor (57).

When the control is at full clockwise (CW), the wiper will be at the end connected to capacitor (65), .004 uF and you will have full bass (minimum treble). This is how you want to wire the control.

--
Ron Ramirez
Ferdinand IN
#3

Hi Ron,
Thanks very much for the clear expanation and your speedy reply... really appreciate all your help.
Have a great day.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
New member
Good picture, When was it taken? You don't look in it like a guy who has a teenage son :)morzh — 06:13 PM
New member
Love the pic! I'm southern IL, so wouldn't be much help and Bob Anderson is very good on those, but lives in Chicago are...TV MAN — 05:25 PM
Philco 40-120C Filament Wiring
:thumbup:klondike98 — 04:56 PM
Philco 40-120C Filament Wiring
With these values I think you are OK; the Cmax for this tube is 40uF. Your Vbb could rise a bit, but probably not too mu...morzh — 04:53 PM
Philco 40-120C Filament Wiring
BTW, someone had replaced the original 20uF/20uF filter cap with a 47uF/33uF cap. Do you think these values are safe on ...bluecap — 04:33 PM
Philco 40-120C Filament Wiring
You're correct. I was misinterpreting the key position. I now know where it is, and things are making sense. I appreciat...bluecap — 04:29 PM
Philco 40-120C Filament Wiring
I think Morzh has a good thought. Check the key position. The under chassis diagram in the Philco info shows an “H” for ...klondike98 — 04:25 PM
Philco 630csx power cord
Yes, the third wire goes to the stud on the side and is separate from the other two. I've usually used cloth covered ...Tynwald — 03:09 PM
New member
Have you tried Alabama Historical Radio Society? They possibly could recommend someone. I remember a name of Dee Hanes...morzh — 03:08 PM
Philco 46-480 Electronic Restoration
Nope, he can’t tell me the dimensions. Looks like I won’t be buying it.jrblasde — 02:38 PM

[-]
Who's Online
There are currently 4011 online users. [Complete List]
» 1 Member(s) | 4010 Guest(s)
Avatar

>