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going down the list - I don't see a miniature screw base at 28 volt 40 mA - the 1487 is only 14 volts - I don't think they used a 1477 - its 170 mA - I'll have to check a radio to see. - Mike - does your burned out bulb have a number stamped on it ?
What a crappy memory I have - I know I fixed each type of radio with these in them - Rogers, Majestic and Deforest Crosley; in some of them the bulb was still good - but I know I did the grain of wheat sub in at least two when I couldn't find a replacement bulb.
Now that I need a few - I'd sure like to find the proper bulb.

http://www.vacuumtubesinc.com/Products/DialLamps.aspx

Mike

:Maybe this link has something you can work with.
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:http://www.vacuumtubesinc.com/Products/DialLamps.aspx
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Mike

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: : : : : : : : : : :Sir Mike. . . . . . : : :Looks like your degree of destruction would be relevant as to which terminal of that lamp got connected to chassis ground. : : :Now, in consulting the enhanced inset of your chassis below, if the [B] terminal was shorted out that 300Vdc thru R35 should put up to a potential 78 watts being across it and vaporizing it. : : :The other situation would be the lamps [A] terminal getting grounded and that lamp should go off like a flashbulb, and then there is a still present power loop to ground thru R35--R36 and there could be a potential 24 watts across those two components for the duration. : : :Guess that you will have to locate those A and B busses and track down all of the tie ins and zero in on R-35 and/or/R-36. : : :Using the voltage references that are marked up around the schematic, reveals a potential 24 VDC being available across the lamp, with the currrent variance being the degree of conduction of the 3 RF tubes plate consumption at signal strengths. : : :Now if that was using a 6.3 VDC lamp at its common 150 ma, to provide a common illunination level, if one was to be using a 24 VDC lamp instead, then a downscaling of the current level at that higher voltage level to maintain that same luminance level would have the current then only being ~35-40 ma. : : :Any chance that lamp still might have its marking on it as per its lamp number? : : :The ONLIEST lamp that I can even think of at a 24 volt rating is the slide type lamp that was commionly used on manual telephone switchboards decades of years ago. : : :Those old 24E and 24X series were 24VDC @ 35 ma rated. : : :In the miniature bayonet configuration . .think #47 or 1847 . . . there is only the 1819 which is rated up at 28VDC @40 ma, which should still function , albeit possibly a bit dimmer. : : :In the even smaller midget basing, there are the 327, 334 , 335 , 385 , 397 , 388 and 399, all of which are spec'd at 28VDC @ 40 ma. : : : :If my unit to repair, just by virtue of the lamp obtainability, I certainly might consider using a High intensity WHITE LED to replace the lamp (CONSIDERING NO MORE SHORTEE-SHORTEE's ! ) : : That would provide a much faster luminance level transitioning response than an incandescant lamp ever would have. : : :If one was use a 1.5 k ohm 1 watt metal film dropping and current limiting resistor in series with the LED, that would have the LED unit running at 10 ma consumption. : : :Considering now that the old lamp was loading down to ~40ma, then one merely shunts across that pair just mentioned, with a 680 ohm 2 watt metal film series resistor, in order to raise the cluster up to a 24V 40 ma drain as the unit was, when using an incandescant lamp. : : :If you want to use a lamp, and are coming up with " unavailabus" or "too muchus", I think that I still have a /some freebie #327's midgets floating around, in case a supplier wants to make you buy ONLY a whole box of 10 at ~$3.00 + a pop. : : : :73's de Edd : : : :

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: : : :Enhanced Inset on Rogers 11-95 . . . SCHEMATIC: : : : : : : : : : :

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::The color code for the resistors in that radio should be as below. you'll have to get the schematic out and trace each of the connections to that dial light - If the resistor has gone off value you will see lower voltage on the plates of all the front end tubes.R36 could also be a problem if the dial light is not there or burned out - I believe that bulb is 24 volts at 40 mA - I've had trouble finding them myself.
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::http://www.nostalgiaair.org/References/rmacodes/reschart.htm
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::Be careful flipping the chassis over too many times - The speaker cords in those radios are quite often brittle and will break the insulation open or break the wire right off if you twist the wires too much.
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