Rogers Ten 60 chassis 26

1/6/2013 9:06:29 PMTim

Have just restored this radio, and it's working ok.
I have a problem with the tuning indicator lamp circuit. I believe the lamp is 24 v, but the voltage being applied is 60 plus volts! dropping 2or 3 volts when a station is tuned in.

Any help appreciated.

1/8/2013 10:28:18 PMRogers flipdial

Hi Tim - are you measuring the voltage across the lamp base - or from one side to ground ? The bulb in question is 24 volt at about 40 mA - if you have an incorrect bulb - or no bulb - the voltages will be off.

1/9/2013 3:25:14 PMTIm

:Hi Tim - are you measuring the voltage across the lamp base - or from one side to ground ? The bulb in question is 24 volt at about 40 mA - if you have an incorrect bulb - or no bulb - the voltages will be off.
:
Measuring at the point on tagstrip where wires connect. I had put a new 24 v bulb in which blew.
Tried an LED and series resistor, drawing about 30ma,
but still measured 60 + volts across.

1/9/2013 5:27:28 PMTim

::Hi Tim - are you measuring the voltage across the lamp base - or from one side to ground ? The bulb in question is 24 volt at about 40 mA - if you have an incorrect bulb - or no bulb - the voltages will be off.
::
:Measuring at the point on tagstrip where wires connect. I had put a new 24 v bulb in which blew.
:Tried an LED and series resistor, drawing about 30ma,
:but still measured 60 + volts across.
:
:

1/9/2013 5:32:59 PMTim

::Hi Tim - are you measuring the voltage across the lamp base - or from one side to ground ? The bulb in question is 24 volt at about 40 mA - if you have an incorrect bulb - or no bulb - the voltages will be off.
::
:Measuring at the point on tagstrip where wires connect. I had put a new 24 v bulb in which blew.
:Tried an LED and series resistor, drawing about 30ma,
:but still measured 38 + volts across.
:
:Made a few more checks, it appears bulb might have blown when i was changing tubes with the radio still on. Tried another bulb, rated 24 v but no current indication, barely glowed and voltage across it dropped to about 7.0, so choice of lamp is critical.

1/9/2013 6:58:28 PMRogers Flipdial

I believe this is the correct bulb - but still haven't got around to ordering some and trying one in a radio.

http://www.bulbtown.com/1448_MINIATURE_BULB_E10_MINIATURE_SCREW_BASE_p/1448.htm

1/9/2013 8:38:34 PMTim

:I believe this is the correct bulb - but still haven't got around to ordering some and trying one in a radio.
:
:http://www.bulbtown.com/1448_MINIATURE_BULB_E10_MINIATURE_SCREW_BASE_p/1448.htm
:
Thanks for that, the bulb socket on this set is standard sized, but i guess any suitable bulb electrically could be made to work.

1/12/2013 1:00:12 PMEd Kraushar

Hi Tim,

I have sucessfuly rplaced that bulb with a miniature bulb with wire leads on it. It was quite a few years ago and I do not have the bulb number. This has also been discussed on other forums.

What is critical is the amp draw of the bulb. It must be extremely low. The voltage does not appear to matter. I got the bulbs from Radio Shack when they were still in Canada. It was necessary to sit the bulb in a drilled dowel in the original socket and wire the leads in outside the socket.

The bulb dims when on station. If you can find a bulb give it a try, the worst that would happen is to burn the bulb out. I would even try as low as 6 volts as long as the current is MUCH less than 0.1 amps.

Ed.