Scryer ... or how F8 met Mighty SissySIT

[Zen Mod]

naah - LED was still happy with 2mA

 

[Demonkleaner]

I built one of these. Determine your resistor before soldering.
I have LED's from the early 70's to current production and
this little bugger is handy dandy. I plan to use it for my Aleph J
boards to set the brightness of the blue LED's. Sorry if I went off topic.

https://www.jameco.com/z/WSMI198-Ve...dy-Kit-Solder-Assembly-Required-_2355119.html

 

[Plott]

Mightiness,
a theoretical question: could this amp (and your other amps incl. XA252) handle a speaker with this (or similar) impedance, minimum nearly 2 ohms...

 

[Zen Mod]

if you see (irrelevant of size/power) same type of OS parts, due to Square Law arrangement, count it done

if you see dissimilar type of OS parts, not so - even if from experience I know that my funniest amps are surprisingly good even if illogically mated with some speakers

if you see present NFB, means DF is better, so that counts

if you don't see overal NFB (as is case with amps having autoformer gain), not so, but - again - Square Law means something

in short

- some of my amps (upper criteria) doesn't care what load is
-other my amps care, but not so much as it is usually expected

observation - speakers having that sort of impedance module really not belong in A Class Fairy-tale

explanation - having A Class amplification naturally calls for speakers of greater efficiency but even more important - greater sensitivity; food for thoughts/illustration - which one is better for your home - 15" bass driver of 93db/W/m and 350W, or 15" bass driver of 93db/W/m and 80W?

leave those from graph for well informed HiFi Aficionados..... not knowing better

 

[ACnotDC]

What kind of woofer is it? Its impedance is growing to infinity with decreasing frequency going to zero?
This is definitely not an Infinity speaker

 

[Zen Mod]

that's software

Xsim - modeled by real life graph, so ignore gibberish bellow lowest logical F

 

[Plott]

if you see (irrelevant of size/power) same type of OS parts, due to Square Law arrangement, count it done

if you see dissimilar type of OS parts, not so - even if from experience I know that my funniest amps are surprisingly good even if illogically mated with some speakers

if you see present NFB, means DF is better, so that counts

if you don't see overal NFB (as is case with amps having autoformer gain), not so, but - again - Square Law means something

in short

- some of my amps (upper criteria) doesn't care what load is
-other my amps care, but not so much as it is usually expected

observation - speakers having that sort of impedance module really not belong in A Class Fairy-tale

explanation - having A Class amplification naturally calls for speakers of greater efficiency but even more important - greater sensitivity; food for thoughts/illustration - which one is better for your home - 15" bass driver of 93db/W/m and 350W, or 15" bass driver of 93db/W/m and 80W?

leave those from graph for well informed HiFi Aficionados..... not knowing better

Thanks for bringing light into darkness 😀

 

[Zen Mod]

ZM Omnilighter

 

[Plott]

 

[byongho]

Is it a good idea to use a spring washer when connecting the heat sink to the bd140?
I am a little worried that the pressure of the spring will stress the bd140.

 

[Zen Mod]

in my builds, I have plain washer and spring washer, with every screw/bolt

especially important where part of thermal interface

no worries about BD body, btw.

 

[byongho]

I'm asking a question just to confirm.
One of the Scryer or Sissysit(42) packages included 1000uf capacitors instead of 470uf.
Is it safe to use 1000uf in that place?

 

[Zen Mod]

yeah

just few positions values are carved in Stone

everything else is either more than good enough...... or more than more than good enough, whatever you got in bagzzzzz

 

[poli]

thanks ZM! seems like a wonderful amp! boards ordered and hopefully Tomo will ship the Tokin THF51s...
really curious how it compares to the F5, that I just finished...

 

[Plott]

Tomo will, don't worry! 😀
The Scryer? It's my favorite, I place it even above the M2 (even if the M2 for Mighty the best one is), you definitely won't be disappointed.

 

[poli]

Thanks Plott! So, no funny Vienna water, it's really the amp 🙂

 

[Zen Mod]

Babelfish M2 is best M2

though, Papa's M2 is Origin, still my fave of them all - Swiss Knife of FW

Every Greedy Boy ought to have one made by original schm

Karma wills it

 

[Plott]

👍 you read really everything

 

[poli]

ok, on the list...will save that for later...

 

[poli]

yep, really went throught the entire thread, often good information hidden somewhere there...