Re: Bus suppressors - extremely hot!
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The necessity of snubber depends on the booster design. They are more commonly needed on NCE boosters than Digitrax due to design trade-offs in the booster design. I didn't think they were supposed to slurp up that much current though?
Alex
-- Alexander Wood Hartford-New Haven, CT Modeling the modern era freelanced G&W Connecticut Northern in HO Digikeijs DR5000 - JMRI - ProtoThrottle - TCS UWT-100 - TCS UWT-50p - Digitrax Simplex
On Sat, Aug 24, 2024 at 8:22?AM Iain Morrison via <w.iain.morrison= [email protected]> wrote: Karst ? A UK site that is to which people are oft referred when they start in DCC by the ‘experts’ on various fora is authored by Mark Gurries. He has a lot of detail on RC filters (also called DCC Snubbers, Suppressors) – a better term might be room heaters ? ?
? Iain ? ? Are those things the suppressor ?
AFAICS, the provide a 100W load on your DCC Bus... which I cannot believe seen the size of the resistor, that one takes maximum 5 Watts. Then we see a resistor with a value of 120 Ohms. Which would take 18V / 120 = 150mA of expensive DCC current away from your system. However, 150mA means a maximum dissipation of 0.15 * 18 = 2.7 Watts.? And indeed, that makes that resistor VERY hot.?
Mystery solved: It does what it was designed for: Eating DCC Current and converting it to ( a lot of ) heat.?
Greets,
Karst
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