Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

transformer 32-7993 in 39-116 console
#1

Hi all,
Need a little help understanding a circuit connection.  I am restoring a 39-116 console.  The separate filament transformer 32-7993 physically has 2 primary leads and 2 secondary leads.  The transformer is stamped as 32-7993 and is original.  The problem is that the schematic has this transformer as 3 (three) leads for the secondary.  The actual transformer has almost exactly 6 ohms between the two secondary leads that are there which is correct by the schematic but does not have the third lead as shown on the schematic, which is supposed to have less than 0.1 ohms and powers the 2A4 Filament.  What the heck is going on with this transformer and this wacky schematic?.  Examination of the leads inside the transformer's case shows no sign of there ever being a third lead in the secondary.

Thanks for any help
Dean
#2

Here's a link to the schematic so folks can better help you out. Having said that, it looks like the center tap on the secondary is connected to one leg of the primary and that is likely a connection made internally in the transformer.
#3

Looking at the schematic, it appears as if the center secondary connection is also connected to one of the primary wires. Maybe that is done internally. Either that or the schematic is wrong. Do you get any continuity between the primary and the secondary for the 2A4 filament?
#4

Excellent call!  Yes the connection is internal and now fully understood what is going on.  I never considered the possibility of an internal connection.
Thanks so much for your insight and knowledge.

Dean




Users browsing this thread:
[-]
Recent Posts
Philco 91 Speaker Replacement
The spider is glued on the cone and so is the voice coil. I think you can use a cotton swab dipped in acetone and carefu...RodB — 02:42 PM
Restoring Philco 37-604C
Yes I saw that. If I knew, I'd probably try to arrange for getting it myself. But I have just got one. Which does not m...morzh — 01:44 PM
Philco 38-2 Automatic Tuning
When you push the lever, you are supposed to rotate the disk to the desired station. Then the magnetic tuning will acqu...morzh — 01:42 PM
Philco 38-2 Automatic Tuning
I figure out the muting from another picture that helped. Now I need to know how the automatic tuning works. When I push...dconant — 12:11 PM
Philco 91 Speaker Replacement
How would I go about removing the spider from the cone?dconant — 12:04 PM
Philco 38-2 Automatic Tuning
Hello, I am having trouble getting my automatic tuning to stay unmuted. If I play with the tuning handle I can get it to...dconant — 10:51 AM
Does anyone make photofinish replacements?
Here’s the link to the DIY photofinish section of our site: klondike98 — 09:46 AM
Delco car radio Peko vibrator converstion issues
Hi Richard, Thx for posting the schematic.  As I remember as a kid, these were great performers for the time, likely...MrFixr55 — 08:56 AM
Delco car radio Peko vibrator converstion issues
hello mr Fixr, The Electro  Powersupply that I am powering the radio with has a huge choke plus a 10,000ufd electrolyti...radiorich — 10:58 PM
Delco car radio Peko vibrator converstion issues
How about putting a choke in the power supply? The big cap was likely an attempt to stabilize the DC. Kids who cre...MrFixr55 — 09:19 PM

[-]
Who's Online
There are currently 2984 online users. [Complete List]
» 1 Member(s) | 2983 Guest(s)
Avatar

>