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
Philco 38-5X
Arran
Phorum Expert
*****
Posts: 4,816
Threads: 54
Joined: Sep 2008
City: Sandwick, BC, CA
#5

10-14-2016, 04:48 AM
(10-13-2016, 10:24 PM)TerryMSU Wrote:  So what gives it away as a 25 Hz model?  I think that may affect my filter cap values on the B+ filter.  You are probably right about the cap mounts.  What do I do about that?
Thanks,
TerryMSU

 The thickness of the iron core, 25 cycle transformers have more laminations to prevent core saturation with the lower line frequency. The values of the original filter caps might be higher in microfarads then in a 60 cycle set to deal with the 25 cycle ripple, but having larger cap values won't hurt anything for 60 cps.
Regards
Arran
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
Philco 38-5 initial inspection - by TerryMSU - 10-13-2016, 09:10 PM
RE: Philco 38-5 initial inspection - by Arran - 10-14-2016, 04:30 AM
RE: Philco 38-5X - by TerryMSU - 10-20-2016, 12:04 PM
RE: Philco 38-5X - by Radioroslyn - 10-20-2016, 01:17 PM
RE: Philco 38-5 initial inspection - by TerryMSU - 10-13-2016, 10:24 PM
RE: Philco 38-5 initial inspection - by Arran - 10-14-2016, 04:48 AM
RE: Philco 38-5 initial inspection - by morzh - 10-14-2016, 09:47 AM
RE: Philco 38-5X - by Ron Ramirez - 10-19-2016, 06:54 PM
RE: Philco 38-5X - by Ron Ramirez - 10-19-2016, 06:58 PM
RE: Philco 38-5X - by Ron Ramirez - 10-20-2016, 01:29 PM



Users browsing this thread: 8 Guest(s)
[-]
Recent Posts
RCA T62 is playing.....
Beautiful set.morzh — 09:07 PM
An attempt to remove the Field Coil from a G speaker
Well....here it is. The green stuff. Unfortunately, probably penetrates deep. I opened the top layer and saw that: ...morzh — 08:58 PM
Philco 91 Restore Code ??
:clap: :clap: :clap: :clap: Really nice workmanship!!! Top of the chassis looks great. Sorry about the long winded e...MrFixr55 — 08:09 PM
Philco 40-120C Restoration
Thank you for your reply. I will check voltages on the other tubes, look at resistor 23 and cap 25, etc. If all else fai...bluecap — 07:58 PM
RCA T62 is playing.....
Nice looking set great save. DavidDavid — 07:48 PM
Philco 89 indicator light.
Hello Jim, I have done several 89s. The trick is to move the drum in or out on it's shaft. You will need to loosen a set...dconant — 07:36 PM
An attempt to remove the Field Coil from a G speaker
MrFixr Yes, it is my plan to go with 45rpm spider if I go that far. No, the pole was not left-handed as I unscrewed ...morzh — 07:14 PM
Philco 40-120C Restoration
Change the tube. Check the tube's bias network. Are any other tubes experience the drop or just this?` Is resistor 23 OK...morzh — 07:09 PM
Philco 89 indicator light.
I forgot how the pointer is formed: could you show the way it is formed and how you tried to change it?morzh — 07:01 PM
An attempt to remove the Field Coil from a G speaker
Was that pole piece left handed ? Since the metal "spider" is toast, wonder if you can either get the "4...MrFixr55 — 06:54 PM

[-]
Who's Online
There are currently 7014 online users. [Complete List]
» 2 Member(s) | 7012 Guest(s)
AvatarAvatar

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