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

40-190 Output Transformer
#3

Just a couple of more things to check before you fire this one up again, check the two output tubes (type 41) for shorts or evidence of arcing at the tube sockets, and then bring the set up slowly with a variac and monitor the B+. If there is a short in either of the output tubes, or arcing at the tube socket, your replacement output transformer will be in peril. Just for fun, you can carefully open up the old output transformer, and see if the "open" is just a lost connection, or a burn out caused by excessive current. I have seen quite a few cases where the connection of the fine primary windings to the cloth covered leads corrodes, or arcs to the transformer casing, and sometimes this can be fixed. Since this is a push pull transformer the primary is center tapped and you may have continuity in only half the winding. If you do have some contiuity and no shorts to the metal casing, save the transformer. You may need it someday to replace a burned out choke.


Messages In This Thread
40-190 Output Transformer - by Bob - 11-05-2008, 06:50 PM
Re: 40-190 Output Transformer - by planigan - 11-05-2008, 11:24 PM
Re: 40-190 Output Transformer - by codefox1 - 11-08-2008, 12:46 PM
Re: 40-190 Output Transformer - by Bob - 11-08-2008, 03:46 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Model 70 Cabinet Trim
musar , Well if you have any more questions feel free to post away . Sincerely Richardradiorich — 08:56 PM
Model 70 Cabinet Trim
Although I have not made any cabinets or cabinet parts for a couple of years, I still have some parts left over, includi...Steve Davis — 06:26 PM
philcorepairbench.com - shadow-meter
Thanks Ron.fenbach — 02:43 PM
Model 70 Cabinet Trim
Thank you, Gary. Before making my original post, I had clicked on "Steve Davis Cabinets" only to find that it...musar — 02:25 PM
philco predicta
Welcome to the Phorum, cgl18! I am not your resource for television repair, but lots of friendly help is available here...GarySP — 02:12 PM
Model 70 Cabinet Trim
Welcome to the Phorum, musar! You can send Steve Davis a private message (PM). The site is at the top of the Home page...GarySP — 02:09 PM
Model 70 Cabinet Trim
How do I contact him? The only contact information for him I could find when searching online was a telephone number th...musar — 10:38 AM
philco predicta
Hello, good afternoon, I would like to ask what the possible problem could be if I don't have an image on the screen. I ...cgl18 — 10:19 AM
Philco model 38 code 121 not receiving signal.
So one last question before I finish this radio. Regarding the speaker and output transformer. I salvaged the original o...Stormlord5500 — 09:31 AM
462ron
It’s on the bottom of the homepage of our Philcoradio.com homepage! Ron462ron — 07:20 AM

[-]
Who's Online
There are currently 527 online users. [Complete List]
» 2 Member(s) | 525 Guest(s)
AvatarAvatar

>