38 38 dial lamp - Printable Version
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: 38 38 dial lamp (/showthread.php?tid=17597)
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: 38 38 dial lamp (/showthread.php?tid=17597)
38 38 dial lamp - vinzer - 12-02-2017
What dial lamp to use in a 38 38t Chuck site doesn't have a number of a lamp for it should be 2.1 volt .12 amps.
RE: 38 38 dial lamp - Radioroslyn - 12-02-2017
Use a 48 or 49 depending on the base. 222 penlite bulb is fine if you have a screw in socket. Current isn't critical as it's in parallel w/the A battery.
GL
RE: 38 38 dial lamp - vinzer - 12-03-2017
A 49 lamp is the half current of the original lamp would it be bright enough?
RE: 38 38 dial lamp - Radioroslyn - 12-04-2017
Typically the lamps chosen for the least amount of current as it would deplete the A battery. If you think the 49 is too dim use a led, less current a plenty bright.
RE: 38 38 dial lamp - vinzer - 12-05-2017
Thanks I ordered a 49 not sure 2 volts would light a led.
RE: 38 38 dial lamp - Radioroslyn - 12-06-2017
[Image: http://dangerousprototypes.com/docs/images/7/7c/LED_FWV.jpg]
RE: 38 38 dial lamp - vinzer - 12-06-2017
I have not found any white led that are less than 3.2 volts I hope the #49 works ok if not might try #43 its 2.5 volts @ .35 amps.
RE: 38 38 dial lamp - vinzer - 12-08-2017
The #49 lamp was ok but it burned out after 2 or 3 hours so I tried a Christmas tree bulb out of a 100 string set it is brighter than the #49 was.
RE: 38 38 dial lamp - Steve Davis - 12-08-2017
We are not talking about the miniature Christmas lights are we? If so, it would not be a good idea. This type bulb has a shunt that shorts the bulb when it burns out.
Steve
RE: 38 38 dial lamp - vinzer - 12-09-2017
That's what I used it won't short at 2 volts needs a higher voltage it gets when burns out it gets full line voltage across it of 120 volts.