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

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

Threaded Mode
Zenith 5R312 voltages
Buzz
Senior Member
****
Posts: 362
Threads: 60
Joined: Jan 2013
City: Portland, Oregon
#16

11-08-2013, 10:43 PM
Hi:
Update on this Zenith radio.
Plan A
I hooked up a bucking transformer and it worked well....Price about $10.. Dropped voltage to 113V.
Howerever, because of the size of the transformer, it could not be mounted on the chassis.
Plan B
I installed a 25 Ohm 25W Vishay/Dale wirewound chassis mount type resistor. Price was about $4... It worked well, and dropped voltage to 115V...Filament voltage was spot on at 6.3V... The heat generated was not a problem, even afer 4 hours... very minor. Both ideas were good, and a great learning experience.
Thanks guys for all your input.Icon_clap
Buzz
(This post was last modified: 11-08-2013, 10:50 PM by Buzz.)
Find
Arran
Phorum Expert
*****
Posts: 4,816
Threads: 54
Joined: Sep 2008
City: Sandwick, BC, CA
#17

11-09-2013, 03:09 AM
You can hook up the bucking transformer off board, you basically make a custom built extension cord with the bucking transformer between one side of the line and the outlet.
Regards
Arran
Find
« Next Oldest | Next Newest »
Thread Closed




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
An attempt to remove the Field Coil from a G speaker
Gary I in fact did, on a 38-14, I think, where I had a speaker with the dead coil. Well...it kinda worked. Kinda, be...morzh — 10:38 PM
An attempt to remove the Field Coil from a G speaker
Mike, what ever happened to that plan you had to try using a rare earth magnet to magnetize the pole? This looks like a...GarySP — 10:25 PM
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

[-]
Who's Online
There are currently 3001 online users. [Complete List]
» 1 Member(s) | 3000 Guest(s)
Avatar

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