[TenTec] Titan 425 Meter lamps?

[Dr. Gerald N. Johnson]

Then check the 20 ohm 1/2 watt resistor R5 on the display board that 
supplies the lamps. Two 1820 should have cooked all the smoke out of 
that resistor if its truly 20 ohms 1/2 watt. That being a nonstandard 
value makes me wonder if its really 10 ohms 1/2 watt, then it should 
have survived though run warm.

Since the 1820 is rated for only 1000 hours, though the resistor will 
help, you might want to buy a box of 10. Mouser www.mouser.com says 68 
cents each in 10 lots and they have 1877 in stock. $9.36 a box of 10 at 
McMaster-Carr, in stock.

Digi-Key has none in stock and requires you purchase 400 minimum at 46.5 
cents each. Go Mouser or LEDs.

73, Jerry, K0CQ

On 10/2/2010 7:46 PM, John Oglesby wrote:
> After opening the amp, the lamps are 1820s in parallel.
>
> John
>
>