I wonder if a wave washer would suffice the "gas tight" requirement.When I was running corrective action at a major computer firm, one of my victories was to BAN all star washers from the plant. So many failure modes it was not funny. We eventually got rid of most split-locks using proper torque instead. Deformed thread hardware was far more reliable.
For good reliability contact, you need to make it "gas tight" which is easy with no washer.
What I did (am doing) in my current build:If on the other side, maybe. We used stacks of them as springs to mount TO-3 transistors. But for a lug to chassis, no need. Lug to a board, then maybe an advantage as boards cold flow. The most reliable connections to solder on a lug/pigtail so it could mount to the chassis with a proper hardware stacked torqued. For an amplifier, I would pigtail-star them.
I have seen a lot of these used in industrial automation panels/racks, as well:One of the reasons we blocked star washers is the serrations could dislodge fragments of metal which was not nice floating around on circuit boards. That they did not work was the major reason. Split locks were just as bad. Bevel washers are great when there is considerable thermal expansion and contraction. Transistor flange to heat sink for example. I am glad to see most transistors are mounted with spring clips now and TO-3 style packages are not as common.
Back in the olden days, we used glypt.
I recently became a member of the Buckeye amp family, having ordered a 4 channel nc252mp based amp and a 4 channel NC502MP based amp. In a 7.1.4 system the stronger 502 amp is for side and rears and the 252 amp is for my Atmos channels.
Long story short, when I hook up the amp with 2 nc252mp modules to my bed layer speakers they’re super quiet and all that’s heard is the amp. Basically it sounds amazing and perfect. But when I hook up my amp with the 2 nc502mp modules there‘s immediately very loud noise coming from the speakers they’re hooked up to. Unfortunately I can’t up a video with the noises but it sounds like electrical interference mixed with high pitched noises and such. It’s very distracting! Futhermore the sounds ONLY come on when sides and/or rear speakers are hooked up and it doesn’t go away regardless if I have the xlr cables connected or not? My side and rear speakers are JTR Noesis 110HT‘s btw.
Is there any kind of a fix to this noise from the nc502mp amp? I’m assuming it had to do with the distance to my side and rear speakers (~20 feet away) since none of my LCRs have the sound when connected to that amp. I figured I’d ask before returning the amp for a refund. I’ve posted this question on the other Buckeye amp thread as someone may have a simple solution I haven’t thought of.
Yes, it did it no matter which channel is hooked up nor input. Fortunately there haven’t been any noise related issues since I went all nc252mp modules. I just saw your question today.Does it do it no matter the channels the surrounds are hooked up to?
Also if you switch inputs, like put the front left/right Input on the surround channels, does it do it?
Long story short, no one could figure out what was causing the noises. But thankfully Buckeye amp issued a full refund for the faulty amp. Out of curiosity, and really wanting to try the nc502mp modules, I decided to order a VTV amp with the same modules in a Ghent case. I figured, hey if the noise is still present even with a VTV maybe my speakers or some other part of my system just refuses to play nice with nc502mp modules (but not nc252mp’s strangely enough). Upon receiving the amp I was pleased to see a full amp testing by audio precision. The VTV amp itself has worked without any issues, I’m more than happy with the audio performance the nc502mp’s give.
I’m actually glad the amp worked well for some else and it’s a happy ending after all. To this day I still don’t understand why it didn’t work in my system and consider it just a fluke. I run and love my Buckeye amp w/ nc252mp modules for Atmos duty, I still wouldn’t hesitate to recommend the brand to anyone!Yea still no idea what the issue was. I sold that amp to a customer after it was returned and it works perfectly fine for them