Just be careful that the thermistor insulation is not compromised so that an electrical is possible from one of the thermistor leads to to any of the MOSFET leads (such as the drain). My first F5 build taught me this lesson.
As mentioned in the thread earlier, Would quick set epoxy work for thermal bonding glue to connect thermistor to FETS, or ok to just have them touching?
I have also learned that lesson.
Burned a trail of pcb, one pot and R.
one of the leads from the NTC got in contact with the bolt?
one of the leads from the NTC got in contact with the bolt?
yes, the NTC was beside, on top of the washer, but diverted 1mm, to measure the Bias touched her hand and seemed a phosphor.
Little cocktail straws (very skinny type) make great leg insulators.
McDonalds coffee straws work well too
Which color sounds best?
Little cocktail straws (very skinny type) make great leg insulators.
McDonalds coffee straws work well too
I do not advise that type of ntc, even isolating the legs he has in mind the wire that easily and the heat may touch the dough, and it's like a rocket birthday...
probably you can use plain one , too
RTV Silicone is type used by all sort of mechanics , because is both temperature and oil resistive
I know, I have a brother in law who has a workshop and I've seen him put a black silicone to seal the bearings. I'll stare at a tube
Uh-oH, now you've done it. You're gonna hear about why you shouldn't use it....blah.....blah......blah. Conductive.........short out.........My F5 has it on the Mosfets for 4 year, I use it every day. NO problems. Not the adhesive btw
preferred straw color is red
Guys with finished F5 -
Would someone with a scope (or really, really nice AC voltmeter) measure how much ripple you have on your rails?
I have 134mv peak to peak and curious if that's a lot or not bad.
I have a speaker hum and can't figure it out...
With my fluke 45, I just measured 13mV on both positive and negative rails. So yours is 10 times worse....
For reference, I can hear a tiny bit of hum with my ear up against the speaker but not at all when farther than a foot or two away.
usual procedure : words and pics , so we can figure out is it magnetic coupling or wiring deficiency
Ok.
RCA jacks isolated from chassis. MAG here -
PSU --> AMP --> speaker connections shown here
Other than those photos, everything else as in this thread - all photos in top 2 posts.
http://www.diyaudio.com/forums/pass-labs/188691-illustrated-guide-building-f5.html
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