[amsat-bb] KR400 controller question

[Paul]

Thanks George, I tried it with and without the resistor and couldn't see 
any difference with the LEDs so wondered if it was just put in to 
increase the life of the bulb. I'll leave them in and see how we go.

The controllers now look like this adding a splash of colour to the 
shack. http://www.ukdx.org.uk/tv/rotator/400s.jpg

Paul
Sussex Coast. JO00

On 06/01/2019 22:33, W3AB/GEO wrote:
> Paul,
> 
> It appears that one unit uses 28V to  light the bulb & the other uses 
> 14V. If the mod is for the unit that is 14V, leave the resistor in the 
> circuit.
> 
> ___
> Sent from my two way wrist watch
> 73 de W3AB/GEO
> On Jan 6, 2019, at 03:26, Paul <paul at ukdx.org.uk 
> <mailto:paul at ukdx.org.uk>> wrote:
> 
>     As both my KR400 controllers have blown bulbs I've modified them to use
>     LEDs as per https://bit.ly/2TzeHud  There is however a small difference
>     that I'd like an opinion on as I'm not very electronically minded.
> 
>     Eddie modified his KR-400RC however on my KR-400 controllers there is an
>     additional 100R between the transformer and bulb. What is its purpose
>     and should I leave it in or remove it when adding the diode, limiting
>     resistor and LEDs shown in the mod?
> 
>     CCT grabs showing the difference https://bit.ly/2FbKIo5
> 
>     Paul
>     Sussex Coast. JO00