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GE Model 250 Radio Service Data Sheet
August 1946 Radio-Craft

August 1946 Radio-Craft

August 1946 Radio Craft Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Craft, published 1929 - 1953. All copyrights are hereby acknowledged.

The General Electric (GE) Model 250 portable radio was considered a "suitcase" style because it looked kind of like - guess what? - a suitcase. It ran on either 120 volts AC or an internal 2.1 volt battery. A charging circuit was provided for the battery, which was a nice feature so the owner didn't have to keep buying new batteries. Fortunately, there seems to be many of these GE 250 radios available in various states of reconditioning. eBay* currently has four listed ranging in price from $40 to $150. One listing has very nice photos of the internal workings and of the Willard model RADIO−25−2 wet storage cell battery (see below, right). Click on the thumbnails for larger images. The nomenclature label for the radio is fully legible. This Radio Service Data Sheet for the GE 250 radio appeared in the August 1946 issue of Radio−Craft magazine.

I had Archive.org save a copy of the page since it will disappear soon.

GE Model 250 Radio Service Data Sheet

Photofacts for Servicemen, August 1946 Radio-Craft - RF Cafe

GE Model 250 Suitcase Radio

Willard model RADIO-25-2 storage battery - RF Cafe

Willard model RADIO-25-2 wet storage cell battery.

GE Model 250 radio Nomenclature label.

GE Model 250 radio Nomenclature label.

Alignment Procedure

1. Complete alignment information is given in the Alignment Chart.

2. The following equipment is required: (a) signal generator with audio tone modulation, (b) a-c output meter, 1 or 1½ volts full scale, and (c) an insulated screwdriver.

3. Remove the front panel from the receiver and connect the output meter across the speaker voice coil terminals. Replace the front cover after the meter has been connected.

4. Alignment Steps 1 and 2. Connect the signal generator between chassis ground and stator of C2-A (middle section of tuning gang), using a 0.05 mf capacitor in series with the lead to the stator.

5. Alignment Steps 3 and 4. Connect a three- or four-turn, 6-inch diameter loop of wire across the output of the signal generator. Set the loop a foot or two away from the receiver cover.

6. 6. When aligning, the output of the signal generator should be kept below 12 volt by resetting the signal generator output. If the signal level is too high, the AVC becomes effective and alignment errors may result.

Use loop on output of signal generator. Adjust L3 and L4 alternately several times to obtain peak. Remove snap buttons in back to permit these adjustments. Keep back cover closed while aligning.

Specifications

Electrical Rating:

     Connected to Power Line: 105-125 V., 50/60 cps, a-c only, 10 watts.

     Operating from Internal Battery: 2.1 v., 1.65 a., 3.5 watts.

Receiver will operate approximately 20 hours before battery must be recharged.

Operating Frequencies:

     Broadcast Band 540-1600 kc

     I-F Amplifier 455 kc

Tube Complement:

     R-F Amplifier ............................. ILN5

     Oscillator-Converter ................. ILC6

     I-F Amplifier .............................. ILN5

     Detector and Audio Amplifier ..... ILH4

     Power Output ............................ 3Q5GT

 

 

Posted October 17, 2022


Radio Service Data Sheets

These schematics, tuning instructions, and other data are reproduced from my collection of vintage radio and electronics magazines. As back in the era, similar schematic and service info was available for purchase from sources such as SAMS Photofacts, but these printings were a no-cost bonus for readers. There are 227 Radio Service Data Sheets as of December 28, 2020.

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Copyright: 1996 - 2024

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    Kirt Blattenberger,

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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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