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

U.S.Radio & Television Corp- Model 80
#2

Hello Dave! Welcome! I have restored several Majestics before. Your set (Majestic mod 80) is known as a early "trf" set. I did some research in my JF Riders, and found that your set has the same tube "lineup", as the Majestic models 70 & 71B in the Grigsby-Grunow pages of JF Riders early schematics. You can also use Nostalgiaair dot org to find this schematic if you dont have it. Capacitor info for these early sets can also be found in your JF Riders pages covering "Majestic" radios in the "Grigsby Grunow" pages. They also made the Majestic Chassis for US Radio & Television. Riders vol 1 is "vague", but you can also use the Grigsby-Grunow pages to supplement your capacitors-ratings info!

Your Majestic mod 80 set uses (5) # 26 tubes in various stages of RF & 1st AF, (1) # 27 detector tube, (2) #71 push-pull output audio, & (1) # 80 rectifier tube, same as the Majestic models 70 & 70B.

Using the capacitors data from the "Grigsby-Grunow Company" JF Riders pages, instead of the JF Riders US Radio & Television pages, should most definately get you in the ballpark for caps ratings! These early TRF sets were "very- forgiving" for recaps!

As a general rule, the electrolytic filter caps in these early TRF type sets had a high voltage rating,but low UF ratings in most cases! I would say 10 ufs@ 500 volts would be more than plenty for replacements in the Majestic power-supply units.

If you have anymore questions or need further help, Im located only 3.5 hrs from you in San Angelo. I can get your radio working again, and/or, show you how & what parts are needed. Sometimes, the "chokes" and/or the filament trans 2.5 v are "open" (bad) in these type early trfs sets also. Easy fix tho if needed! Icon_wink


Messages In This Thread
U.S.Radio & Television Corp- Model 80 - by Dave D - 09-06-2008, 12:38 PM
Re: U.S.Radio & Television Corp- Model 80 - by Texasrocker - 09-10-2008, 03:06 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco model 40-100
That was part pf what began my interest in tube battery radios, the variety of circuit designs, especially by Grimes-Pho...Arran — 02:37 PM
Studebaker/Philco AC-2687 car radio
Phill; I had a look at my Riders "Specialized" car radio books yesterday, I don't have one that covers Stud...Arran — 01:50 PM
Philco Model 249 made in England
Thanks for the information MrFixr55.   It's tube amplification and not solid state. TOMfklown — 11:27 AM
Philco Model 249 made in England
Well, I’ll be! I learned something.jrblasde — 11:03 AM
Philco Model 249 made in England
Yes, Garrard was well-regarded for its standalones.morzh — 10:48 AM
Philco 46-480 Electronic Restoration
Quite the interesting stories, sir! Somewhat reminds me of my first job out of school (not that I worked in a similar fi...jrblasde — 09:33 AM
Philco model 40-100
Arran, I restored 2 Canadian battery-crank telephones for a friend a while ago, a Northern Electric (Canadian version of...MrFixr55 — 08:04 AM
Road Trip for a Philco 46-480
Beautiful work, a 79 year old radio brought back to life. The first FM radios for me, a little iffy, had some I just cou...Jimradio — 08:01 AM
Philco 46-480 Electronic Restoration
I was a field engineer for a biomedical company for many years. Many was the time that I was driving home from NYC in t...MrFixr55 — 06:40 AM
Philco 46-480 Electronic Restoration
Don't laugh folks, I have not been above taking a chassis into the bathtub (when Ms. Fixr was out of the house), taping ...MrFixr55 — 06:02 AM

[-]
Who's Online
There are currently 991 online users. [Complete List]
» 2 Member(s) | 989 Guest(s)
AvatarAvatar

>