As suggested by Garey, I replaced both the two #47 bulbs with the much more durable #755. Light is back in my T-4XB!
73 Franco IZ2OOS 2010/4/25 Garey Barrell <[email protected]>: > Franco - > > The two bulbs are in series across the 12V filament supply, so if either > opens up, they both go out! So one just burned out! > > The originals are indeed #47 bulbs, and are available from just about any of > the usual electronic parts supplier. They are/were the "standard" bulb in > just about every piece of electronic equipment that had bulbs! :-) If you > can find them, I would suggest that you replace both bulbs with #755 types. > The #47 is a "3000 hour life" bulb, while the #755 is a "20,000 hour life" > bulb, meaning that you most likely will never have to replace them again. > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs > <www.k4oah.com> > > > iz oos wrote: >> >> Hi folks, >> >> both the bulbs at the plate amps rel. output and at the dial stopped >> working as I turned up the T-4XB. I turned it on after about 1 minute >> I had turned it off and then the lamps stopped working, I don't know >> if this could be related to the burning of the lamp, but it happened. >> Where could I find the right replacement for these bulbs? Looking at >> the schematic they look like to be ## 47 ## 47 (I am not sure about >> that) am I correct? What could have been the cause? >> >> My T-4XB is so dark now!!!! >> >> 73, >> >> Franco IZ2OOS >> >> > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
