radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

515F

515F ; General Electric Co. (ID = 1124914) Radio
 
515F ; General Electric Co. (ID = 1124915) Radio
 
515F ; General Electric Co. (ID = 1124916) Radio
 
515F ; General Electric Co. (ID = 1124917) Radio
 
515F ; General Electric Co. (ID = 1124918) Radio
 
515F ; General Electric Co. (ID = 133816) Radio
 
515F ; General Electric Co. (ID = 224525) Radio
 
515F ; General Electric Co. (ID = 224526) Radio
 
515F ; General Electric Co. (ID = 521877) Radio
 
515F ; General Electric Co. (ID = 521878) Radio
515F ; General Electric Co. (ID = 2298803) Radio 515F ; General Electric Co. (ID = 227787) Radio
515F ; General Electric Co. (ID = 800743) Radio 515F ; General Electric Co. (ID = 235682) Radio
515F ; General Electric Co. (ID = 50870) Radio 515F ; General Electric Co. (ID = 710922) Radio
515F ; General Electric Co. (ID = 800744) Radio 515F ; General Electric Co. (ID = 800745) Radio
515F ; General Electric Co. (ID = 800746) Radio 515F ; General Electric Co. (ID = 1791186) Radio
Use red slider bar for more.
515F ; General Electric Co. (ID = 2298803) Radio
General Electric Co.: 515F [Radio] ID = 2298803 1400x976
Select picture or schematic to display from thumbnails on the right and click for download.
For model 515F, General Electric Co. (GE); Bridgeport CT, Syracuse NY
 
Country:  United States of America (USA)
Manufacturer / Brand:  General Electric Co. (GE); Bridgeport CT, Syracuse NY
Brand
 
Musaphonic
Year: 1951 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 12BE6 12BA6 12AV6 50C5 35W4
Main principle Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
Tuned circuits 6 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Alternating Current supply (AC) / 105 - 120 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
Power out 1 W (unknown quality)
from Radiomuseum.org Model: 515F - General Electric Co. GE;
Material Modern plastics (no Bakelite or Catalin)
Shape Tablemodel with Clock ((Alarm-) Clock Radio).
Dimensions (WHD) 11.9 x 6.2 x 4.3 inch / 302 x 157 x 109 mm
Notes Color=Brown Mottle.
External source of data Ernst Erb
Source of data Collector's Guide to Antique Radios 4. Edition
Circuit diagram reference Beitman Radio Diagrams Vol. 11, 1951
Mentioned in The Radio Collector's Directory and Price Guide 1921 - 1965 (Rider's Perpetual, Volume 22)
Literature/Schematics (1) Photofact Folder, Howard W. SAMS (Date 9-51, Set 143, Folder 7)


All listed radios etc. from General Electric Co. (GE); Bridgeport CT, Syracuse NY
Here you find 2745 models, 1918 with images and 1939 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
General Electric Co.: 515F
Threads: 1 | Posts: 7
Hits: 792     Replies: 6
general-el: motorboating noise
Steve Varadi
08.Apr.20
  1

Anybody experiencing motorboat noise during alignment proceeding on this Radio: GE 515F? Let me know what did you do to eliminate it.

Thanks:

Steve

Dietmar Rudolph
08.Apr.20
  2

In most cases, motorboading occurs, if the electrolyt capacitors of the B+ voltage have lost their capacity. In this model this is a dual elyt C23A & C23B, both should have 50μF.

Try to solder an elyt of 47μF in parallel to C23A, and probably another in parallel to C23B. If motorboating stops, you were sure to replace C23A&B.

Good luck,

Dietmar

Steve Varadi
08.Apr.20
  3

Hi Dietmar,

I check both electrolyte (C23A, C23B) show 54.7uF, because I recap the whole system before I try to do alignment on it. Even I "cuered" the SMD (Silver Mica Desease) as you can see in the picture.

I do not see any other electrolyte cap in this Radio. If you have another tip it would highly appreciated.

Steve

Dietmar Rudolph
08.Apr.20
  4

Hi Steve,

when recapping, often mistakes occur when the numbers on the capacitors were mis interpreted. One capacitor is critical in this sense, namely C20 (5nF). Please check its value. If C20 has to big a capacity, motorboading is very probable. This is also true for C17, which should have 2 nF.

Regards, Dietmar

 

Steve Varadi
08.Apr.20
  5

Regarding C17 and C20 they are together with C19 and C26 in one unit CERAMIC caps. I did not bother them (yet!) Now I just check C17 2.87 nF (should be 2 nF) C20 6.49 nF (instead of 5 nF)

Do you think they are too high in value and worthed to replacing? I think I do not have at Home ceramic caps in those value.

I want to tell you the whole story about motorboating: I followed the alignment chart, step one was ok, but when I want to do step two I get the motorboating when give the 455 kHz from my SG-8. 

Before I start alignment I can get two (only 2) local Station fairly clear with good volume without any motorboating noise. I hear this noise ONLY when I want to do alignment.

This will help to solve the motorboating noise?

Thanks:

Steve

Dietmar Rudolph
09.Apr.20
  6

What you are describing looks like a feedback between the generator and the radio.  Please try to operate the radio via an isolating transformer.

Do you use a probe tip to inject the intermediate frequency? Else you may inject in the way shown in the graphics.

The ceramic capacitors look pretty o.k. Now I think, there will be no problem with them.

Regards, Dietmar

Steve Varadi
12.Apr.20
  7

Thank you very much for your illustration. I never put my wire loop in the cardboard, however this is a very clever idea. BTW mine loop (only in the Air without suppor by anything) is working well also.

Finally I finished the Alignment and I'm satisfied with it. Here you can see and hear (33 sec.)

Thanks again.

Steve

 
General Electric Co.: 515F
End of forum contributions about this model

  
rmXorg