Hi friends,
Looking for a replacement part of the auto dimmer sensor of a Superstar 3900N.
Is it a photodiode or a Transistor? No schematic found anywhere.
Thanks and 73,
Ralf
Superstar 3900N Dimmer sensor
- 13EL121
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- 13EL121
- Radio Addict
- Posts: 618
- Joined: 16 Sep 2008, 20:55
- Call Sign: 13DA121
- Location: Germany
- Contact:
Re: Superstar 3900N Dimmer sensor
Problem fixed. The sensor is a phototransistor. But I set a 500k potentiometer in parallel to the PT to adjust the dimming level.
- cb4ever104
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Re: Superstar 3900N Dimmer sensor
Thanks for letting us know Ralf !
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- 13EL121
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Re: Superstar 3900N Dimmer sensor
Ordered this phototransistor,
https://rover.ebay.com/rover/0/0/0?mpre ... 3522265920
Maybe there are better types, but it works.
https://rover.ebay.com/rover/0/0/0?mpre ... 3522265920
Maybe there are better types, but it works.