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

Thread Closed

power supply to convert from 32 volt DC
#34

Well once again the simplest things...and dumbest mistakes...can cause the biggest headaches. That annoying buzz was driving me crazy on the radio, as I could not pinpoint what was causing it. Nothing helped. Even with the more beefy 175 VA transformer there still was no improvement. I found a couple of small caps I missed and replaced those. Still buzzing. So then I got to fiddling around with the ground wire... again. I had clipped it on to everything metal I could find, and it made no difference. Then it happened. I touched it to the metal plate surrounding the wall socket where I had the power supply plugged in. Eureka! The radio quieted down, and I could get a bunch of stations up and down the dial loud and clear. That was it...so now I know I need to use a 3 prong plug when I hard wire the cord into the power supply. I tried a 3 prong plug cord, just gator wiring it on to the two connections on the transformer and the prong wire onto the ground wire of the radio and it worked fine. Icon_thumbup

So I want to thank all of you who chimed in and offered advice, suggestions, and help. Especially Terry. Without his help and guidance, I never could have brought this old Coronado farm set back to life. What a kind and generous man...he even PM'ed me his phone number (and I was THIS close to giving him a call too if I hadn't had my AH-HA moment)

When I get it all back together and mounted in the cabinet I'll post some pics of it. That's my weekend project....I have off of work tomorrow so have an extra day to button it up. With temps in the 90's and a 70% dew point, the nice cool basement is a good place to be (as opposed to an already hot factory with no A/C) Icon_lolno

Greg V.
West Bend, WI
Member WARCI.org


Messages In This Thread
RE: power supply to convert from 32 volt DC - by NostalgiaRadioTime - 08-18-2016, 10:53 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
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

[-]
Who's Online
There are currently 1368 online users. [Complete List]
» 2 Member(s) | 1366 Guest(s)
AvatarAvatar

>