Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Next case - Odd Philco 42-720 Tropic
#72

Arran

I went down and took some measurements.

6.3V is reading 6.54V.
5V is reading 5.13V.

I could not measure plate to plate on the rectifier as one of the electrolytic capacitors is in the way, so:

5Y3GT pin 6 to B- is reading 288.8 VAC.

B+ measured 325.3 VDC from rectifier output to B-; and 248.4 VDC from rectifier output to chassis ground.

This transformer has three terminals for AC input - common, 115 and 125. I am using the common and 125V taps. At least, that is what the diagram states (gray, 115V tap; black, 125V tap). I should measure with my ohmmeter (with the power off and radio unplugged, of course) to be sure I am using the 125V tap and not the 115V tap.

AC line input is reading 123.9V.

Using a 5Y3GT, I only needed 2A for the 5V winding. And using LEDs for the three pilot lamps will cut down on current consumption a little bit.

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
RE: Next case - Odd Philco 42-720 Tropic - by sam - 10-30-2014, 03:55 AM
RE: Next case - Odd Philco 42-720 Tropic - by Ron Ramirez - 11-23-2014, 02:54 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM

[-]
Who's Online
There are currently no members online.

>