09-12-2008, 01:24 AM
Hello again Dave! You bet, us fellow Texans are "no-scared" of tackling these early Majestic trf sets! They are fine receivers too, once electronically restored! I went back into my Riders Vol 1 pages, and found that the "Grigsby Grunow Co." page that covers your set is: page#1-1 of the Grigsby Grunow Co pages, Not to be confused with the: "majestic" pages in vol #1.Look for your actual "Grigsby Grunow Company" pages in vol #1, instead of the Majestic pages. The Riders vol 1 is all screwed up in most cases, but ol Mr JF Rider was just learnin how to print early schematics back then!Heres the nostalgiaair link/ schematic, that covers your chassis, I referred too in my previous post. Click below:
http://www.nostalgiaair.org/PagesByModel...040004.pdf
From looking at the schematic, this is a very simple chassis to re-cap. Where the tubes-sockets "plates pins" -to- chassis ground" originally used .5 mfd bypass condensers, use modern day .47/600v orange-drop bypass caps. I also noticed a orig .00025 uf cap,and several other bypass caps of various uf's which you can sub a modern 250 pf cap/ for the .00025.& others/conversions in uf/pf also. Just follow the schemat, and bring your set up slow with variac after recap, and check your voltages before installing the tubes again!( check your 2.5 v filament tube socket connections, and your High Voltage on the rectifier tube-socket connections. Be Careful!!Use a 1 amp fast-blo fuse on one side of your incoming ac line for safety before applying any ac current from variac. The radio shouldnt pull over 1,or 2 amps max when fully electronically restored.Keep a fuse inline to be safe on the pwr trans! Also, make sure your orig Spkr field-coil ( and all other coils,& trans are still good,check continuity and ohms of each part. If Spkr field is not good (many arent), you will need to sub a new 10 watt wirewound type power-resistor of close approx "ohms" rating, then if you do, you can add/use a modern type PM Spkr also if needed as replacement if you wish,and/ or, have your orig spkr field repaired, and remove your "subbed" spkr field resistor and rewire set to orig using orig spkr field.
( a little bout this Texan)
I lived in Dallas for over 12 yrs, Austin for over 13 yrs, and decided to move away from the "metro-mess" in my older yrs. I am a "retired" pro musician, that has worked with Tx BEST pro musicians for over 30 yrs in live touring/ pro studio recording. I learned vintage tube-repair to service my own amps while I was touring many yrs ago.I was trained in vintage radio repairs by a ol-timer USAF radio tech from WW2 for over 12 yrs now. Im still learning! Thats the BEST thing about this hobby indeed!
If you dont know already?, You have one of the very=Best U.S. Spkr recone facilities nearby you in Dallas! The Company is called "Freeman-Tuell Spkr Company". They are located off I-30, on eastside of Dallas downtown area, on Ferguson Rd. Those guys are "superb" on reconing vintage Spkrs indeed at very-reasonable prices! Ive been dealing with them over 35 yrs now for pro Spkr recones!
Best of luck on restoring your Majestic! If you need anymore assistance, I will be more than happy to help if I can!!Jus tryin to help!!
http://www.nostalgiaair.org/PagesByModel...040004.pdf
From looking at the schematic, this is a very simple chassis to re-cap. Where the tubes-sockets "plates pins" -to- chassis ground" originally used .5 mfd bypass condensers, use modern day .47/600v orange-drop bypass caps. I also noticed a orig .00025 uf cap,and several other bypass caps of various uf's which you can sub a modern 250 pf cap/ for the .00025.& others/conversions in uf/pf also. Just follow the schemat, and bring your set up slow with variac after recap, and check your voltages before installing the tubes again!( check your 2.5 v filament tube socket connections, and your High Voltage on the rectifier tube-socket connections. Be Careful!!Use a 1 amp fast-blo fuse on one side of your incoming ac line for safety before applying any ac current from variac. The radio shouldnt pull over 1,or 2 amps max when fully electronically restored.Keep a fuse inline to be safe on the pwr trans! Also, make sure your orig Spkr field-coil ( and all other coils,& trans are still good,check continuity and ohms of each part. If Spkr field is not good (many arent), you will need to sub a new 10 watt wirewound type power-resistor of close approx "ohms" rating, then if you do, you can add/use a modern type PM Spkr also if needed as replacement if you wish,and/ or, have your orig spkr field repaired, and remove your "subbed" spkr field resistor and rewire set to orig using orig spkr field.
( a little bout this Texan)
I lived in Dallas for over 12 yrs, Austin for over 13 yrs, and decided to move away from the "metro-mess" in my older yrs. I am a "retired" pro musician, that has worked with Tx BEST pro musicians for over 30 yrs in live touring/ pro studio recording. I learned vintage tube-repair to service my own amps while I was touring many yrs ago.I was trained in vintage radio repairs by a ol-timer USAF radio tech from WW2 for over 12 yrs now. Im still learning! Thats the BEST thing about this hobby indeed!
If you dont know already?, You have one of the very=Best U.S. Spkr recone facilities nearby you in Dallas! The Company is called "Freeman-Tuell Spkr Company". They are located off I-30, on eastside of Dallas downtown area, on Ferguson Rd. Those guys are "superb" on reconing vintage Spkrs indeed at very-reasonable prices! Ive been dealing with them over 35 yrs now for pro Spkr recones!
Best of luck on restoring your Majestic! If you need anymore assistance, I will be more than happy to help if I can!!Jus tryin to help!!
