开云体育

Bus suppressors - extremely hot!

Dave All Messages By This Member #4516 Edited I have recently installed two DCC Concepts Bus Suppressors on my layout. I have 2 power zones, each supplied by a Digikeijs Digiboost, with one suppressor on each zone. ? I use a track feed from a Z21 black connected to the sniffer input of each Digiboost. ? As soon as I power up, both suppressors get very hot to the touch, is this supposed to happen ? ? Many thanks ? Dave ? ? -- Dave, Portland Church Hope Model Railway /?
karst.drenth All Messages By This Member #4519 What are those Things suppose to suppress ?? anything in general getting Hot, means dissipation of expensive DCC current ?
Iain Morrison All Messages By This Member #4520 开云体育 Karst ? “What are those Things suppose to suppress ??“ The suppress your wallet’s ability to buy anything given the price that is charged for them by a UK company compared to the actual cost for a resistor and a capacitor ? Iain ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of karst.drenth via groups.io Sent: 23 August 2024 18:49 To: [email protected] Subject: Re: Bus suppressors - extremely hot! ? What are those Things suppose to suppress ?? anything in general getting Hot, means dissipation of expensive DCC current ?
karst.drenth All Messages By This Member #4525 On Fri, Aug 23, 2024 at 10:53 AM, Iain Morrison wrote: They suppress your wallet’s ability to buy anything given the price that is charged for them Hahahah....? but did not really mean that ;)? I am seriously interested what people were smoking, thinking a DCC "bus" should be terminated with some kind of suppressor... Greets, Karst
karst.drenth All Messages By This Member #4526 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
Iain Morrison All Messages By This Member #4527 开云体育 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 ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of karst.drenth via groups.io Sent: 24 August 2024 11:28 To: [email protected] Subject: Re: Bus suppressors - extremely hot! ? 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
Alexander Wood All Messages By This Member #4529 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 toggle quoted message Show quoted text 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 ? From: [email protected] <[email protected]> On Behalf Of karst.drenth via Sent: 24 August 2024 11:28 To: [email protected] Subject: Re: Bus suppressors - extremely hot! ? 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
Dave All Messages By This Member #4531 Some interesting thoughts here.? whilst I agree that the components that make up the suppressors are available at a fraction of the cost many of us would not be confident to build our own units.? The DCC concepts units are not particularly expensive and provide a trustworthy solution. I would not be confident to build my own without specific instructions. After all I am placing it across a circuit with hundreds of pounds, if not into the thousands of pounds of equipment connected to it.? -- Dave, Portland Church Hope Model Railway /?

Previous Topic Next Topic