LuDEF

Yup, I'm still learning about a lot of this stuff, and sometimes when you dont know something, you dont even know there is a piece of information to extract..
That is why i'm always thankful for patience and try not to be too much of a bother (but maybe a little 🙂 )
 
ZM being Chicken with precious speakers, protection is welcome

I can share files for that protection ...... but for everyone around is much easier to buy ready made one from Ali or whatever, with uPC1237 or similar**, than to arrange production of pcbs and chase of sorta rare protection chip

I'm thinking of sending freebie bare pcb with all my kits, and even uPC1237 , if I succeed in getting them in quantity from trusted source

If I find enough time to get circuit with more generic parts, things could be much simpler


**peanuts price, peanuts shipping
 
Thanks, I currently have an issue in one channel of new to me WvL Son fieldcoil speakers after listening contently for one week, not sure why and if DIY ACA could be a culprit, but these are a bit too expensive to leave to chance. I will look for uPC1237 ready made one.
 
Thanks, I currently have an issue in one channel of new to me WvL Son fieldcoil speakers after listening contently for one week, not sure why and if DIY ACA could be a culprit, but these are a bit too expensive to leave to chance.
Lucky me with the help of Wolf von Langa I recentered the spider and all is well again. Might have been transport related misalignment. Now to focus on a suitable amp -> actually finish what I have.
 
What sims predicted and I got in vivo - insane THD levels; can't explain, can't explain......
Of course - things can be varied a little, but as far as I'm concerned - only in one way - varying Uds of LU +/-100mV ( so down to 2V3 and up to 2V5, now sweet spot being at by Papa prescribed 2V4, F3 Beastie)
Can you please point me to Papa's 2V4 prescription? Mille grazie!
 
well, sometime numbers are worthy as words

in many instances, I did found schematics worthy of whole-evening-reading session
 

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even if I'm working on some other stuff (orders, plenty of tiny wires), LuDEF P somehow sneaked on my bench today ....

not much, but certainly most tricky is done - all SMDs are soldered on

:clown:

premonitionprecognition is strong ..... next week, T-Bed

:rofl:
Hey, Xen

How is the work going?
Some updates for us who are following the progress with excitement and how the result will turn out at the end...

RGDS
Lydlaug