u/BewareTheWereHamster

Been mucking around a bit with slow solves in front of the TV for a few weeks and decided to get back into my push to get to sub-20 (again, for the 10th time... haha). Last time I solved regularly with the app + smart cube was over 9 months ago and my Ao1000 was 22.5s at that point and improving as I'd just finished learning full-CMLL and recognition was taking "some time". I have been (just) sub-20 in the past.

Clearly after that time I've forgotten 90% of CMLL (again!) - can remember all the H and Pi cases and a few random T and others albeit I occasionally forget in the middle of an alg still but that's easy enough to work on. Yet again however, my absolutely *horrible* second block is ruining my solves.

Did a quick 24 solves for an average of 26.1 with the overview graph appearing to give me the finger as usual. Pretty inefficient as expected with 2L CMLL and just general rustiness but the highlight was the last solve above - I think this is the first time I've ever spotted and 4 move first block that's as nice as that in a real solve - ie. making two lines simultaneously and solving. Of course, I marvelled at my own genius and screwed up the rest of the solve but 19.41 is pretty good for me in general let alone after an extended break so I'm not complaining too hard.

I've asked this question I don't know how many times over the years but again - anyone have any tips as to how to actually PRACTICE finding pieces for the second block? I kinda feel like even though I can typically either fully see the FB solution or at least the first pair and track the second pair, I have a big black hole after that where I simply lose sight of everything and have to pause to find pieces to continue. My feeling is that if I can "simply" track a couple of the SB pieces whilst executing FB that my times will improve MASSIVELY.

Cubeast says that for this session, my recognition time for SB is 1.39s. This is only to find the down-edge or whatever I'm solving first however as there are pauses after that - my execution for SB in a 26s solve is 9.15s!

Is it a matter of just spamming solves and then eventually you'll "get it" - I think not as I've been doing exactly that for a number of years albeit with a pretty large break this time. There's got to be some kind of drills / practice routine that will enable you to lookahead more effectively - any ideas anyone?

Hi all,

Was hoping that someone could give me some advice as to where to go with this. I have a Legion 5 (15ACH6H) from 2021 (IIRC) that I'd bought new back then. I've had intermittent fan issues for as long as I can remember in that it seems very keen to set the fan speed to absolute MAX on the GPU side but not to ramp it down afterwards. Over the last few months the issue has been gradually getting worse until now the GPU fan is permanently running at 100%:

https://preview.redd.it/5sv11pe8sleh1.png?width=1150&format=png&auto=webp&s=216e2818b324cecd5c077d763caf140b91cc86a5

https://preview.redd.it/12gffozvsnch1.png?width=464&format=png&auto=webp&s=4f7f306e7124b173d754d5b512bde30100944334

So, my latest project is a "real" tube version of a preamp I've already built based on the "Ruby Tuby" (which runs on 12V only). The image above is the second tube stage and the output and this is the section I have some concerns / questions about.

This is a preamp but I'm planning to run this as a pedal rather than straight into a dedicated power amp. With everything dimed (in simulation / LTSPICE) I'm getting approx +70V/-80V at the output of VOL1. Clearly, if I run this into my reverb / delay pedal it's not going to like that much so I need to reduce that to a sensible level. The question is, how?

As I see it, using a pair of resistors like above is going to reduce the level by a decent amount - in this case I'm seeing approx +/- 3V with everything at max. I can reduce this further by adjusting the resistor values which is fine however...

Is the output impedance of the tube going to cause any issues with the next stage? Anything I'm planning to use as the "next stage" is likely to have an opamp buffer at the input so I don't believe this should be an issue, right?

If I do need to reduce the impedance so it "plays nicely" with other devices, what are my best options for doing that? I know that tube amps typically use a cathode follower - ie. another tube to do this but I'd rather avoid that. Can I simply put a TL072 or similar after the resistor divider where the voltages are not likely to fry it (!) or are there other considerations?