Sansui R-303 Stereo Receiver

[lcdman]

Hello All,

I'm almost finished restoring a Sansui R-303 Receiver. But I'm not having any luck sourcing a replacement bulb for the back-lit tuning dial. The old bulb had a blue sheath around it to change the light color to blue. I tried measuring the connection point for the old bulb to get the voltage info. I got 18.50VAC.
Does anyone know where to locate such a bulb? Or perhaps a circuit to drive a regular blue LED in its place? Any help at all would be greatly appreciated!

Have A Great Holiday Weekend
lcdman

[kc8adu]

nothing there for scale but it looks like a common grain of wheat like the ham rigs use.
are there several in series?i suspect that is a 24v or a more common 12v and a series resistor.
and i often replace with led's.unless its a marantz blue may look tacky.
the tinted boot whitens it.
maybe white led's?
you will need a diode too.
or run em from another regulated source.

[lcdman]

Hello kc8adu,

Thanks for the reply. There is just one bulb lighting the entire dial. So I should be looking for a 24v bulb instead? You mentioned a diode or resistor. There is one resistor on the circuit board that the blown bulb came off of. What about a circuit diagram to replace the bulb all together? I haven't had any luck sourcing a free schematic for this receiver either.

Thanks Again
lcdman

[selldoor]

How about one of these - Doesnt seem to say if its ac or dc

http://www.bulbtown.com/2102_MINIATU...ASE_p/2102.htm

[lcdman]

Hello selldoor,

I seen that site as well. And it doesn't say AC or DC? It looks like what I have now that don't light up. I did look into those grains of rice bulbs that were mentioned in a earlier post. Those might work as well. No one has replied about a schematic for this receiver as of yet either.

Thanks
lcdman

[kc8adu]

incandecents dont care about ac or dc.
just had a yaesu g800 rotor control in here with a dead bulb.it ran from the 14v ac winding on the transformer.a 1n4007,white led,and a 470 ohm resistor and it should be good forever.
if the slight flicker bugs you a small lytic across the led will reduce that.
since it edge lights the scale i used a diffused led.
your sansui probably does too.

[lcdman]

Hello Again kc8adu,

Thank you again for your quick reply. I would rather use an LED than a regular miniature bulb. Would you be so kind to put all those parts you mentioned in your last post into a labeled schematic? I'd like to return this receiver to its owner soon. I'd be very grateful if you would!

Thanks As Always
lcdman

[Bobhoskin]

Hi LCDman, I've the same Sansui R303, with the same bulb problem, do you found a solution?

Other than this, I've a bigger problem, audio it's all distorted and can't regulate Volume.....
here: http://www.badcaps.net/forum/showthr...542#post339542