Soft-start -VS- CL60 Thermister's

[thor61]

The Diyaudio store has a soft-start pcb, Mr Pass shows only the CL60's in his schematic's can anyone give their options on using either ? Which is better and why ? Or are both needed when constructing a F4 or F5 type amp ? Thank-you !

 

[AudioSan]

i prefer soft-start. i use hypex soft-start with CL-60's insted of resistors

 

[Marra]

Like Audiosan I prefer a soft start.I've been using one of these for some years.Not the cheapest but works well.

soft start electronics for audiophile hifi audio amplifiers : avondale audio

 

[ersa191]

I think that soft start is better then NTC, because CL-60 wont be in his strength, unless he cools off, short time on/of/on

 

[Zen Mod]

best thing is bstrd of these two

soft start circuit with NTCs instead of fixed resistors

do not forget that soft start must be optimized for each particular case , to avoid abrupt currents when switching relay ON

that solution covers case of blackouts , which is only case where simple -NTC in line- solution is critical

 

[MEGA_amp]

CL60 is the most simple and time tested. I usually connect a CL60 to it's own DPDT swtich, turn amp on, wait 3 seconds, then turn off the CL60. Just don't forget to 'enable' CL60 prior to next power up.

 

[AudioSan]

well. that is exactly what a simple softstart will do. and you don't need te remember to do all that manualy. so i will say that a simple softstart with CL-60's insted of fixed resistors are the easy way.

 

[MEGA_amp]

sure, it adds a step, but no pcb is necessary.

 

[dantwomey]

I've used the Pass CL60 design and have no problems. Why make things more complicated?

Regards,
Dan

 

[Zen Mod]

just in case if you're having both monstrous C bank ( and adequate xformer ) and often blackouts in mains

result is burned fuse