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

38-39 Vibrator Power Supply Replacement
#16

Hi Guys.  Two discoveries have come to pass;  The last person to work on this radio had apparently changed the 3 volt battery polarity for the tube bias, which was causing the 1H4G audio tube to be overdriven. I corrected this and used a single CR2032 battery instead of the three poorly mounted button cells.  With that, most of the noise went away. I also purchased a solid state mosfet vibrator from PekoRF and fitted it into the Philco can. Now the radio plays quite well but needs a good long wire antenna to obtain a strong signal to overcome ambient hash noise. I aligned it as well as I could and was hoping for greater sensitivity, but it only has one IF stage, so I guess and good antenna will be necessary.  This has been a beneficial learning experience for me.  However, I may think twice before taking on another farm radio restoration!


Attached Files Image(s)
   




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 39-116 radio and remote
The transformer I located is from a Philco TV chassis, circa 1948. The part number is 32-8391 I do have the replace...Brad Winder — 08:59 PM
Philco 41-221 Restored
Hello Rod, Wow that radio looks great nice job ! Sincerely Richardradiorich — 07:39 PM
Philco 269 - 444 FIVE VALVE VERSION?
From what I can remember the model 444 "People's Radio" used a special tube/valve called a PenDD61, it was the...Arran — 06:54 PM
Philco 41-221 Restored
Nice Radioslford310 — 06:24 PM
Philco 269 - 444 FIVE VALVE VERSION?
Hi Chaz,  You may want to post the tubes used in your radio.   From Radio Museum, it seems that the set uses some ...MrFixr55 — 05:14 PM
Philco 41-221 Restored
Today my grandson and I finished the restoration of this Philco 41-221. It has had all the rubber coated wiring replaced...RodB — 03:19 PM
Philco 39-116 radio and remote
Hi Brad, I had no idea that the overheating was problematic in this radio.  Do you know the part number of the transfor...RichG — 03:01 PM
Philco 269 - 444 FIVE VALVE VERSION?
From the photo it looks the sockets are screwed and the front one does not even match the hole.morzh — 02:54 PM
Philco 269 - 444 FIVE VALVE VERSION?
Hi Chas a welcome, Perhaps we'll have to reverse engineer this to sort it. So let's start w/what tubes does it use? And...Radioroslyn — 12:28 PM
Philco 39-116 radio and remote
Hi Rich, From my experience, unfortunately it is not uncommon to find the power transformer in the 39-116 to be overhea...Brad Winder — 09:25 AM

[-]
Who's Online
There are currently 1821 online users. [Complete List]
» 1 Member(s) | 1820 Guest(s)
Avatar

>