[MrFixr55]

Hi Northern Rocker/

First off, welcome to the Philco Phorum, a family-friendly (or Phamily-Phriendly) place of radio hobbyists interested in the Philco brand and antique radios in general. 

Please "surf" this site, read the Rules and Regulations, and "What NOT to post".  We have various topic forums for chassis and cabinet restoration, radios other than Philco, TVs, Audio, Test Equipment and the Trading Post, where to place "For Sale" and "Wanted to Buy".  Don't forget to stop in at "Old Ron's Bar and Grill" for a virtual burger and brew and to shoot the breeze with the gang about almost anything'

Now to your radio:

Take a look at the tube compliment.  If they match the schematic for the 40-100, you are on the right track.  This is a 4 tube superhet radio that runs on a 1.5V A battery and 90V B Battery. In this case, the 2 batteries were contained in the same package.  You can run it on a 1.5V alkaline D cell and 10 9V batteries in series. though it won't run for long, it will run for a few hours.  The schematic and tube compliment do not vary by much other than part values.  The tubes are:
a 1A7 Pentagrid Convertor
a 1N5 IF Amp (Ensure that the tube is shielded and that the shield is grounded to the chassis)
a 1H5 Diode / Triode Detector / AVC and 1st AF Amp (If the tube and grid cap are not shielded, dress then against the metal of the IF transformer can.)
A 1A5 Audio Power Output tube

Note that there is a resistor in the B- line between the battery and Chassis ground.  This is to develop the "C-" necessary to bias the Audio Output tube and the 1st AF tube.

Please note that you will not be able to detect a glow from the tube filaments in daylight or room light.  Even in a pitch black room, it will be difficult to detect a glow. If they glow at all, it will be an extremely dull red.  Therefore, don't trash these tubes just because you can't see light.

These tubes were developed by Sylvania in around 1938 and replaced the tubes used in many battery sets since about 1930 or so whose tubes' filaments ran on 2volt storage batteries. These 4 tubes spurred the development of portable radios that became extremely popular, in addition to the "farm" sets. The portables were very similar to the farm set circuits except that portables were developed that were operable on house current. This involved wiring the tube filaments in series and adding a 117Z6 or similar rectifier tube or a selenium rectifier. Farm sets were generally not wired for battery or house current operation, as the farm generally lacked utility power. Convertors became available but were not popular because when power finally arrived to these farms, the farmer generally opted for a new radio that had between 2 and 5 watts or more of power. The tubes were changed to 7 pin miniature tubes around the time of WWII but the circuits remained similar. This 4 tube battery radio lasted into the late 1950s when the transistor was finally commercialized and became somewhat affordable. Though much more expensive than the 4 tube portable when they first came out, the savings in batteries paid for themselves in a short period of time.

While these sets do not generate the level of heat that bakes resistors and capacitors to failure, it is still a good idea to replace all caps, especially the 10 uF electrolytic across the B Battery.  Despite the pure DC feed, the cap is necessary to prevent oscillation or instability.

The 1A5 develops only about 100 mW of power.  The 1Q5 develops almost twice as much.  Though it uses a beam power tube, the pinouts are the same.  However, to take advantage, the bias resistor, #18 and the output transformer must be changed.  The output transformer for a 1A5 is about 20KOhm primary impedance.  The 1Q5 needs an output transformer with an impedance of about 8KOhms.

Hope this helps.