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

Bad Transformer?
#5

Without the 84 plugged in, you can check the AC voltage across each side of the secondary winding. First, measure at pin 2 of the 84 and the negative lead of part 61, the 12uF filter cap. Next, measure at pin 3 and the negative lead of part 61. The measurements should be similar, and I'm guessing around 300VAC.

If one or both sides are substantially less than 300VAC, your power transformer is toast.

-Greg


Messages In This Thread
Bad Transformer? - by Dark High - 10-28-2011, 09:19 AM
Re: Bad Transformer? - by Texasrocker - 10-28-2011, 03:15 PM
Re: Bad Transformer? - by Dark High - 10-28-2011, 08:00 PM
Re: Bad Transformer? - by Arran - 10-28-2011, 09:19 PM
Re: Bad Transformer? - by gvel - 10-29-2011, 10:28 AM
Re: Bad Transformer? - by Dark High - 11-14-2011, 09:32 PM
Re: Bad Transformer? - by 7estatdef - 11-15-2011, 12:30 AM
Re: Bad Transformer? - by morzh - 11-15-2011, 12:10 PM
Re: Bad Transformer? - by Chuck Schwark - 11-15-2011, 12:36 PM
Re: Bad Transformer? - by codefox1 - 11-15-2011, 02:28 PM
Re: Bad Transformer? - by Dark High - 11-15-2011, 03:45 PM
Re: Bad Transformer? - by Ron Ramirez - 11-15-2011, 05:13 PM
Re: Bad Transformer? - by Dark High - 11-16-2011, 05:56 PM
Re: Bad Transformer? - by 7estatdef - 11-16-2011, 07:05 PM
Re: Bad Transformer? - by james1095 - 11-17-2011, 02:43 AM
Re: Bad Transformer? - by Dark High - 11-17-2011, 09:17 PM
Re: Bad Transformer? - by 7estatdef - 11-17-2011, 11:44 PM
Re: Bad Transformer? - by Dark High - 11-18-2011, 10:33 AM
Re: Bad Transformer? - by Dark High - 11-18-2011, 04:04 PM
Re: Bad Transformer? - by morzh - 11-18-2011, 10:24 PM
Re: Bad Transformer? - by Dark High - 11-21-2011, 01:14 PM
Re: Bad Transformer? - by 7estatdef - 11-21-2011, 02:03 PM
Re: Bad Transformer? - by james1095 - 11-22-2011, 01:33 AM
Re: Bad Transformer? - by Dark High - 11-22-2011, 10:53 AM
Re: Bad Transformer? - by codefox1 - 11-22-2011, 04:47 PM
Re: Bad Transformer? - by 7estatdef - 11-23-2011, 12:28 AM
Re: Bad Transformer? - by Texasrocker - 11-23-2011, 10:41 PM
Re: Bad Transformer? - by james1095 - 11-25-2011, 03:20 AM
Re: Bad Transformer? - by Dark High - 11-28-2011, 01:00 PM
Re: Bad Transformer? - by Dark High - 11-28-2011, 01:01 PM
Re: Bad Transformer? - by Dark High - 11-28-2011, 04:19 PM
Re: Bad Transformer? - by morzh - 11-28-2011, 06:25 PM
Re: Bad Transformer? - by Dark High - 11-29-2011, 11:54 AM
Re: Bad Transformer? - by morzh - 11-29-2011, 05:52 PM
Re: Bad Transformer? - by TA Forbes - 11-29-2011, 08:27 PM
Re: Bad Transformer? - by 7estatdef - 11-29-2011, 09:28 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Road Trip for a Philco 46-480
Haha, thank you sir!jrblasde — 10:35 PM
Philco model 40-100
Arran, that is very true. I have 2 Mantola 419 4 tube battery sets. One is totally unrestored other than the electroly...MrFixr55 — 10:03 PM
Philco model 40-100
Hi Marion, Great solution to the problem. Of course, they did not have LEDs "back in the day". Just test...MrFixr55 — 09:51 PM
Road Trip for a Philco 46-480
Great Job Joseph! :clap: :clap: :clap:   Grab another and get started, Big Dog!MrFixr55 — 09:45 PM
Philco model 40-100
Thanks Arran and MrFixer55 for your input regarding my post. I think I will just fix the on/off flag in place so that it...mhamby — 07:19 PM
Philco model 38 code 121 not receiving signal.
Thank you for the reply Arran. I will do as you suggest and report back.Stormlord5500 — 03:34 PM
Studebaker/Philco AC-2687 car radio
Arran, Thanks for digging into your radio library. The Studebaker radio model is AC-2687/S5524. It has a power/ speaker...Pdouglaski — 02:04 PM
Philco Battery-WWII vintage
Yep. It had handles on either side, and it took two reasonably strong men to carry it. We had that Soviet FIAT 500 c...morzh — 11:45 AM
PT-6 finished!!
I’ll get on doing that and see what happens. Just to keep this all in one thread - Anyone know what length/size is u...bridkarl — 10:01 AM
Zenith H725
Hello Ed, Well done on your part anyway that radio uses neon bulbs ? Sincerely richardradiorich — 09:43 AM

[-]
Who's Online
There are currently 768 online users. [Complete List]
» 1 Member(s) | 767 Guest(s)
Avatar

>