1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

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

Linear Mode
40-200 Push Buttons
Arran
Phorum Expert
*****
Posts: 4,859
Threads: 54
Joined: Sep 2008
City: Sandwick, BC, CA
#8

11-01-2018, 04:14 AM
I don't know how the pushbuttons are designed in the 40-200, but in some sets it's quite normal for there to be a range for each pushbutton,
so the lower ones won't tune in anything above a certain frequency, whilst the upper ones won't tune bellow a certain frequency. These are the banks that have an oscillator coil for each button, with a slug, and a trimmer, and they are electrically switched in and out of the front end. Some Philcos don't use this setup, they switch in a trimmer, and or a padder for each button rather then a coil, in which case each button should work across the dial.
Regards
Arran
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
40-200 Push Buttons - by drrenaud - 10-29-2018, 03:16 PM
RE: 40-200 Push Buttons - by Radioroslyn - 10-29-2018, 05:07 PM
RE: 40-200 Push Buttons - by drrenaud - 10-30-2018, 07:53 AM
RE: 40-200 Push Buttons - by Radioroslyn - 10-30-2018, 09:37 AM
RE: 40-200 Push Buttons - by drrenaud - 10-30-2018, 03:57 PM
RE: 40-200 Push Buttons - by jcassity - 10-31-2018, 09:25 AM
RE: 40-200 Push Buttons - by Radioroslyn - 10-31-2018, 10:25 AM
RE: 40-200 Push Buttons - by Arran - 11-01-2018, 04:14 AM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM
Philco 610B oscillator wiring
Regarding the oscillator circuit which is comprised of the 6A7's cathode, control grid, and screen grid. These elements ...Radioroslyn — 10:33 AM
Philco 42-345 Restoration/Repair
Hi OSanders, First off, welcome to the Philco Phorum where Phine Phamily-Phriendly Pholks Phull of Philco Phacts and P...MrFixr55 — 08:41 AM
Philco 42-345 Restoration/Repair
Today I've been reading through the site trying to learn more about this radio. I also soldered the lose power cord cabl...osanders0311 — 08:24 PM
Philco 610B oscillator wiring
Thanks David! I do have that same later prodution model 610 schematic. I've also studied the Philco service bulletins fo...Tubester — 08:12 PM
Philco 610B oscillator wiring
Some info from Beitmans says late production. David   David — 06:06 PM

[-]
Who's Online
There are currently 2502 online users. [Complete List]
» 2 Member(s) | 2500 Guest(s)
AvatarAvatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration