The Singing Bush

[Zen Mod]

well, that's The Praise for both SissySit and (Real McKay) Singing Bush , even if it sounds as paradox .....

thank you

 

[ggetzoff]

I made monoblocks using 4U Deluxe chassis.
Was able to use 2SK77B outputs. Power is there
Not able to say it’s superior to SissySIT View attachment 869454

View attachment 869455

Nice work! Maybe after it breaks in.....

 

[asphalt]

Singing Bush

Thanks for the kind words re build
Will keep listening!

 

[alheiz]

I have a crazy idea un My brain
If is possible handle the bias voltaje with IC LED drivers
Constant current?
🤔🤔🤔
ZM

 

[Zen Mod]

possible of course (as everything is possible) , but logical ........ same as using helicopter , to get from front of your house to lobby

 

[alheiz]

Thks ZM
I understand .... helicopter = NOISE
But if use a drone......��

https://4donline.ihs.com/images/VipMasterIC/IC/INFN/INFNS10688/INFNS10688-1.pdf?hkey=6D3A4C79FDBF58556ACFDE234799DDF0

Searching some similar.

 

[Zen Mod]

nope noise

purpose, over-complication, using a cannon to open a fish can, whatever

 

[alheiz]

I will draw on the basics and elementals of these groups!
**Do It Yourself**
diyaudio.... gracias

 

[AnthonyA]

Wave at zenmod.

 

[Zen Mod]

have info to wait few days more , to see will your destination be added to second wave

if not, will send to mein Bruder Generg (im Vaterland), begging him to re-send to you

so matter of a week, to send either direct or to Generg

 

[AnthonyA]

Okidoki
Danks

 

[twitchie]

Amazon left 2 of these on my door today:
SMPS 500W 60V

Big enough? How to you tame these to behave properly? CRC good enough or do I have to add iron (choke)?

Trying to avoid lifting giant donuts and long wait time for Antek delivery (plus added brokerage and customs).

 

[Zen Mod]

hope simple RC will do the job - say 0R1 then at least 15mF, as absolute minimum

though, test it under some load , to see how fast is going alive after powering up - you don't need it being faster than biasing PSU

if needed , power it with delay

if you need simple circ for that, just buzz

 

[jwjarch]

And test the added capacitance or your SMPS may experience hiccup and not want to start up at all.

 

[pras1170]

Hello, are there any results about THF-51 old used? Test Results

 

[Zen Mod]

Hi Pras

as I already wrote - whichever suffix THF 51 is having, it is certainly good, now when we got to conclusion that suffix is nothing else than grouping by Ugs

for Singing Bush, no Ugs value being critical , single possible adaptation could be change of small resistor value, to accommodate for border value of Ugs , in case that span of Ugs voltage I got in original schematic is not sufficient

I'm still short with time to finish some tests for newest biasing arrangement for SissySIT, but will finish that too , hopefully soon

so, as Papa sez - snatch them while you can ........ whatever value of Ugs is, being new or used ......;

though, having a pair with Ugs value close one to another is advisable , at least some guarantee that transfer characteristics are close

more important with Singing Bush, less important with SissySIT, due to difference in output stage nature (having voltage gain, no having voltage gain)

 

[AnthonyA]

Any news?

 

[Zen Mod]

it'll be send to Germany this week

 

[flocchini]

Up and Singing

My Singing Bush is up and singing - thanks to Nelson and mighty ZM

Absolutely quiet with the Tannoys

Voltage 60V
Voltage at SIT 36.4V
Current 2.2A

Initial listening - very smooth, involving - need to do more

Absolutely worth the build

 

[Ben Mah]

Fantastic, Bob.

Enjoy.

Ben