IckyB, if Lynn decides to reorder some PCBs, consider:
The SIT-3X Amplifier
In the meantime, consider:
25W Single Ended Hammond 193V Choke Loaded 2SK180 L'Amp
The SIT-3X Amplifier
In the meantime, consider:
25W Single Ended Hammond 193V Choke Loaded 2SK180 L'Amp
If used THF-51 devices are acceptable, Prasi includes a mounting kit with each device: isolation pads, nuts, bolts, etc
At least now I know what is that Y. stands for:
SHMJ | Yasushi Watanabe
Short story https://jqrmag.com/e/pdf/01_Interview.pdf
Your patience will be rewarded.
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Zen Mod, SissySIT rules Singing Bush?!!! 😱
well, One must rule them all

(Horses for Courses)
So having them both sitting here,
The singing bush is great, I would say more transparent than SissySIT...
But, the SissySIT with a VFet part 2 driver is much better than the SB.
Punchy, dynamic with amazing detail and lots of body. Also with the lower output impedance drives speakers with varying impedance better.
Thanks ZM. You make Nelson proud.
My two cents 🙂
The singing bush is great, I would say more transparent than SissySIT...
But, the SissySIT with a VFet part 2 driver is much better than the SB.
Punchy, dynamic with amazing detail and lots of body. Also with the lower output impedance drives speakers with varying impedance better.
Thanks ZM. You make Nelson proud.
My two cents 🙂
Attachments
If used THF-51 devices are acceptable, Prasi includes a mounting kit with each device: isolation pads, nuts, bolts, etc
How much is cost of one used piece ?
Received today my THF-151S from Tomoaki. Beautifully packed ; matched to perfection and with the insulators/ferule...etc.
Tomo is a real gentleman. I can only recommend this source.
Can't wait for this build and see how this will fare with my Full Range system.
Very cool.
What insulators, ferule you received ? They looks like ? Thanks in advance 🙂
So having them both sitting here,
The singing bush is great, I would say more transparent than SissySIT...
But, the SissySIT with a VFet part 2 driver is much better than the SB.
Punchy, dynamic with amazing detail and lots of body. Also with the lower output impedance drives speakers with varying impedance better.
Thanks ZM. You make Nelson proud.
My two cents 🙂
Great assessment Botte - I totally agree - SissySIT is the amp I come back to - however if I never heard the Sissy I would be totally happy with the Singing Bush
I need to put the VFET2 ( Tea Bag boards) in the system and see how it compares.
Botte - have you done that comparison?
Hi Bob,
Yes I’m loving the SissySIT with the VFet part 2 driver. I did a new layout for the driver, you can see it in the picture.
IMHO the SissySIT follower is Crazy good!
Yes I’m loving the SissySIT with the VFet part 2 driver. I did a new layout for the driver, you can see it in the picture.
IMHO the SissySIT follower is Crazy good!
How much is cost of one used piece ?
She had them at $39 each in AliExpress then once this thread started she increased the price to $50 each.
She asked $100 each for the new ones, so I guess that explains why everyone is buying Mr. Tomoaki's ones instead.
there will be Plethora SissySIT
same DEFiSIT OS, new (active) FE ........ also some NFB involved

edit: Botte - now I see that you're having Edcor ; I'm giving Cinemag some praise there .......
however, that's nice subject - what one likes more - less details while more organicity (xformer gain) or more details while less organicity (active stage gain) ......
with my big honking and not honking speakers............... sometimes ......... dunno ....... like them all, when done properly
same DEFiSIT OS, new (active) FE ........ also some NFB involved

edit: Botte - now I see that you're having Edcor ; I'm giving Cinemag some praise there .......
however, that's nice subject - what one likes more - less details while more organicity (xformer gain) or more details while less organicity (active stage gain) ......
with my big honking and not honking speakers............... sometimes ......... dunno ....... like them all, when done properly

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..so I guess that explains why everyone is buying Mr. Tomoaki's ones instead.
Thanks for your answer with informations 🙂
Choices are still possible..
Papa has them all + rare exotic models and laught.
Looks promising
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Hi Bob,
Yes I’m loving the SissySIT with the VFet part 2 driver. I did a new layout for the driver, you can see it in the picture.
IMHO the SissySIT follower is Crazy good!
Now I see it !!! Great job
Thinking ahead a little bit I sifted through a 117 page AAVID pdf to find the correct Polyphenylene Sulfide (PPS) shoulder washer for a TO-3.
Looked up the part number at both Mouser and Digikey only to find it's listed but non-stocked at both places with a lead time of 12 weeks at Mouser.
So I'm at plan B unless someone comes up with an easier or cheaper solution or has the proper part bookmarked and ready to go. McMaster-Carr has these washers that are rated at the same 500 degree F temp as the PPS version.
McMaster-Carr
They're for a #6 screw and have a sleeve OD of 0.187 that converts to 3/16" which is the mounting hole diameter that I roughly measured on my 2SK182ES.
Looked up the part number at both Mouser and Digikey only to find it's listed but non-stocked at both places with a lead time of 12 weeks at Mouser.
So I'm at plan B unless someone comes up with an easier or cheaper solution or has the proper part bookmarked and ready to go. McMaster-Carr has these washers that are rated at the same 500 degree F temp as the PPS version.
McMaster-Carr
They're for a #6 screw and have a sleeve OD of 0.187 that converts to 3/16" which is the mounting hole diameter that I roughly measured on my 2SK182ES.



IckyB, if Lynn decides to reorder some PCBs, consider:
The SIT-3X Amplifier
In the meantime, consider:
25W Single Ended Hammond 193V Choke Loaded 2SK180 L'Amp
Thank you, I’ll be reading the next few weeks......

So I'm at plan B unless someone comes up with an easier or cheaper solution or has the proper part bookmarked and ready to go
Like this? RS PRO Nylon Screw Insulator, M4, 9mm | RS Components
I had to buy the length that was available and then cut to size
If used THF-51 devices are acceptable, Prasi includes a mounting kit with each device: isolation pads, nuts, bolts, etc
Perhaps best to use a proper insulation pad if you intend dissipating real power. Those freebies look/feel very suspicious.
however, that's nice subject - what one likes more - less details while more organicity (xformer gain) or more details while less organicity (active stage gain) ......
There is a third option, which combines the best features of both but of course is more expensive: use a made to order transformer on a large core with core material chosen according to your own preference.
There is a third option, which combines the best features of both but of course is more expensive: use a made to order transformer on a large core with core material chosen according to your own preference.
if you take Cinemag Hi Nickel, you'll hardly find any significantly better sounding
I know, I have better, not worth the mounting fuss
I believe what Botte said is more matter of preference for specific sound character than matter of sound quality
dunno did my Uncle Bubba Bob tried Onetics instead of Cinemags, but this is my stance ........
anyway , we'll see - as I said, I'm working on active FE which can be used instead of xformer gain cell, which will give same overall THD Spectra, just pushed miles down, hoping that I'll like it in same amount as I like organicity given with Iron (Nickel, whatever)
Nope.Like this? RS PRO Nylon Screw Insulator, M4, 9mm | RS Components
I had to buy the length that was available and then cut to size
The important is right diameter C = 5mm = 0.196" see on the picture.
More lenght is a good thing, yes cut to size 🙂 Best regards
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