MRC AD322 Decoder Headlight Issue

[electricity_bill]

Hello
I have got hold of a quite old MRC AD322 sound decoder which I was planning to use as the power for an A-B lash-up that I have also recently acquired. The decoder is a little basic, but it works in terms of driving a motor on a bench test. However, when bench testing the lighting functions with an LED and resistor combination, they all work except for the headlight. When the headlight is connected and switched on, the motor dies and requires a reset to bring it back to life. Any ideas?

 

[Greg Elmassian]

HAH!

Throw it away. I have about 10 of them still, I bought for $5 that I use as sacrificial decoders in temporary installations. Wait until the relay latches up and something smokes.

It is really an unreliable design.

MRC AD322

Greg Elmassian web site on large scale trains and garden railroads, cigars, and computers

elmassian.com

Greg