Here is the link to Crocker Nuclear Laboratory on the campus of UC Davis
http://crocker.ucdavis.eduThere is a history section. I directed the facility from about 1991 to 2008. It was also the base for my particulate air quality research. Crocker is known for its Proton Eye Therapy and Semiconductor testing facilities as well as particulate air quality research and medical radioisotope development.
I think Nelson or Kent English posted some pictures of Nelson's visit but I can't seem to find them. Sorry
I have them somewhere........ but obviously didn't name them logically so no way of finding them deliberately
The new search function works much better ...
here they are, I think:
https://www.diyaudio.com/community/threads/the-singing-bush.349248/post-6109876
here they are, I think:
https://www.diyaudio.com/community/threads/the-singing-bush.349248/post-6109876
Nice, thanks🙂 I have been googling Bubba Bob 'cause this never reached the Netherlands (or my age group😉)
I must be doing something wrong because when I google Bubba, I keep getting video of a guy talking non-stop about shrimp 🙂
ZM threads are off topic by default 😛
ZM threads are off topic by default 😛
Thank you, it's an inside-out amp. Better pictures from the F6 thread first appearance of the test mule - inspired by MZM t-bedWoah, that test mule kinda really looks good!
if you want it working now, decrease Iq to, say, 600mA and chill
in a meantime, prepare L bracket in length of at least 100mm and replace existing one; you can keep position of Ge as is, longer length of bracket will increase thermal transfer
lapping/sanding bask of bracket is helpful, in case of uneven extrusion - not all brackets are made in same quality
edit: in critical cases, everything is important; for Ge, having relatively small contact area ( at least for ZM Chicken, thinking per datasheet), even thickness of Mica and thermal goop used is important
tiniest possible Mica and best goop you can find; I have some generic ones ( without data) and I'm using that only for heatsink slapped on TO220 or such, nothing more critical
you got both channels to behave, or still at first one?
in a meantime, prepare L bracket in length of at least 100mm and replace existing one; you can keep position of Ge as is, longer length of bracket will increase thermal transfer
lapping/sanding bask of bracket is helpful, in case of uneven extrusion - not all brackets are made in same quality
edit: in critical cases, everything is important; for Ge, having relatively small contact area ( at least for ZM Chicken, thinking per datasheet), even thickness of Mica and thermal goop used is important
tiniest possible Mica and best goop you can find; I have some generic ones ( without data) and I'm using that only for heatsink slapped on TO220 or such, nothing more critical
you got both channels to behave, or still at first one?
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Thank you, mighty ZM
I'm still at the first one (was, actually, will continue mañana).
Already guessed it would end with another bracket. Oh naïve moi ...
I lapped and sanded the bracket almost like a katana-swordsmith. I doubt the alloy isn't the best (it's rather standard stuff, but I didn't find the better conducting alloy.)
The Ge has a pad of red keratherm (cutted by me), the bracket is connected with the best goop I could find (
WLPK10 - Wärmeleitpaste 10ml 10W/mK, Fischer Elektronik) — I always get a buzzing head when I try to figure out wether a high W/mk is better or not...
I'm still at the first one (was, actually, will continue mañana).
Already guessed it would end with another bracket. Oh naïve moi ...
I lapped and sanded the bracket almost like a katana-swordsmith. I doubt the alloy isn't the best (it's rather standard stuff, but I didn't find the better conducting alloy.)
The Ge has a pad of red keratherm (cutted by me), the bracket is connected with the best goop I could find (
WLPK10 - Wärmeleitpaste 10ml 10W/mK, Fischer Elektronik) — I always get a buzzing head when I try to figure out wether a high W/mk is better or not...
ZMighty is having some, still ........... but you are not old enough to play, and be content, with Old Ge
sort of Al is not critical for thermal transfer, as it can be for machining; so - you're good
everything else you listed is OK ........ so just replace L bracket with longer one
To be successful in part hunting, it needs to be a habit, not an activity - meaning you are always doing it. If you can stop doing it then you are healthy, but if you can't control yourself but you are happy then happy sick is just as good 🙂
I got mine on global auction site and there are a few different candidates mentioned in the thread. If I list it here, it will make it too easy for parts scalpers to grab them but last week there were still some candidates still available.
I got mine on global auction site and there are a few different candidates mentioned in the thread. If I list it here, it will make it too easy for parts scalpers to grab them but last week there were still some candidates still available.
Had a 10‘ testrun @ 80 mV - Ge went not warmer than 38°C
Will try what, 100mV next, this afternoon…
Will try what, 100mV next, this afternoon…