ZM's 2SK2087C musings, phase two - SissySIT (42) as a cradle

[Zen Mod]

can't see, Keratherm, or Alumina pad?

forgot to say - compare, you have lower THD figure at 1W than I had

that's exactly due to higher rails - mine are 23V-ish

 

[codyt]

I was thinking that must be the case re: thd. Of course that leads to next question - even higher rails and slightly lower Iq worth exploring?

Using keratherm now

 

[Zen Mod]

already done, XA252, for more

 

[codyt]

For a bit of fun, I swapped out my monolithic diode bridges for a couple of LT4320 bridges I made a while back. Point being, I wanted to get a bit more voltage out of the PSU. Went from 27V to 28.5V, so a bit more. I lowered the Iq to 1A7 to compensate for total dissipation. Ended up with a slight THD reduction (.12%, now .11%). While making the RTA's, I experimented with Iq to see how it impacted THD in real time. Interestingly, the span from 1A5 to 2A Iq gave the exact same THD results. Then I remembered the autoformers – its it fair to say they dominant the THD values here, ZM?

 

[Zen Mod]

buffer + autoformers are adding some (iron usually blamed for 3rd, not even ones) , but be absolutely sure that OS is greatest THD generator there

why you're asking?

SissySIT is perfect result of all projected goals, main of them being DEFiSIT for Masses (read - UberGreedy Boyz)

if you want something with lesser THD, build another amp

 

[codyt]

Just having fun ZM, just having fun

 

[von Ah]

Ruthlesssnesss

 

[Zen Mod]

Just having fun ZM, just having fun

sorry, I forgot smiley

 

[codyt]

 

[nicoch58]

For a bit of fun, I swapped out my monolithic diode bridges for a couple of LT4320 bridges I made a while back. Point being, I wanted to get a bit more voltage out of the PSU. Went from 27V to 28.5V, so a bit more. I lowered the Iq to 1A7 to compensate for total dissipation. Ended up with a slight THD reduction (.12%, now .11%). While making the RTA's, I experimented with Iq to see how it impacted THD in real time. Interestingly, the span from 1A5 to 2A Iq gave the exact same THD results. Then I remembered the autoformers – its it fair to say they dominant the THD values here, ZM?

HI ,I see more 60Hz 27 vs 28.5v , is LT4320 better relate gremlins by diode? tnx

 

[codyt]

I don’t think LT4320 is responsible for the hump in this case. I’ve noticed the 60hz hump is usually dependent on how I route my test leads, etc.

 

[flocchini]

SissySIT 42 ready to go
Sounds great -Really stable set up - tap your foot sound - gets you involved

 

[codyt]

Lookin good, Bob!

 

[Zen Mod]

Powercon or Speacon?

 

[flocchini]

Powercon

 

[Zen Mod]

after previous escapades of Mighty Bubba, appropriate pic; good to be back:

 

[flocchini]

absolutely - could not have done it without the help of Mighty ZM and the diy community

 

[Zen Mod]

Blame Pa

 

[flocchini]

as always !!!!

 

[codyt]

Have had Sissy42 in my system for a few days now. Just keeps sounding better!