[grendel23]

I just finished my SOHA II, Very nice build, sounds great, a definite step up from my SSMH. now I need to save for HD600's.
Has anyone else noticed that the excel BoM is missing P1P, the pot to adjust the high voltage? Luckily I had one that would work.

 

[runeight]

Congrats on the build grendel. How did you do the texture on the panels? They look like the Hammond panels that you have worked over. Yes?

I didn't notice the missing pot. So I guess I'd better add it.

Let us know how it does after a while of listening.

Also, if you have a mind to you can add a small access hole for the B+ pot on the top panel and you can actually adjust the B+ while you're listening to find a spot that you like best.

Have you rolled any tubes yet? Etc.

 

[krisio06]

That's looks astonishing..
I want that..

Good job...

 

[runeight]

Yes, I agree. It's pretty amazing.

I have updated the Excell BoM with Mouser and Digikey part numbers but not Farnell and RS numbers. Thanks for catching that grendel.

 

[grendel23]

I used rust-oleum copper hammertone paint. I didn't expect the birdseye effect, but I like it.
I used a mill to drill the holes in the top, if the spacing wasn't perfect, it would look like crap.
I only have 5963 tubes so far, but will obtain others to try.
I am currently running B+ at 90V, does that adjustment make a big difference in sound?
I have only listened for a few hours, but I am impressed so far. I am running with an Alien DAC and SR80's, but HD600's and a gamma DAC should make it sing.
Does anyone have recommendations for other tubes to try?

 

[runeight]

It's hard to say on the B+ as there are so many different ears out there. My wife likes the original B+ of 60V. I can't really hear much difference between 60V and 100V. But others can and it may be different for different tubes.

I've tried quite a few tubes in mine and I like the RCA 5963s the best. I think you should try ordinary 6922s and 12au7s just to see the differences. dBel84 and others like the 8416 the best.

 

[wiatrob]

All, please see some impressions from this weekends meet - not in depth, for a mini-meet there was a LOT of gear, but the SOHA II is featured...

http://www.head-fi.org/forums/f45/11...s-pics-377603/

 

[wiatrob]

Quote:

Originally Posted by runeight /img/forum/go_quote.gif It's hard to say on the B+ as there are so many different ears out there. My wife likes the original B+ of 60V. I can't really hear much difference between 60V and 100V. But others can and it may be different for different tubes.

I recently rolled the B+ back down to 60, for 'old times sake'

although I thought I noticed a difference before, I can't tell as much now..

 

[Uncle Bob]

Quote:

Originally Posted by runeight /img/forum/go_quote.gif Yes, I agree. It's pretty amazing. I have updated the Excell BoM with Mouser and Digikey part numbers but not Farnell and RS numbers. Thanks for catching that grendel.

P1P 10K 3/8" Trimmer
Farnell Part No 9353186 (Bourns 3296W series)
Rapid Part No. 68-1946 (3296W equivalent - TruOhm series)

UB

PS. my pcb arrived today

 

[wiatrob]

More great SOHA II Ancilliary inmpressions: http://www.head-fi.org/forums/f45/11...ml#post4941349

'Monster Bass!'

 

[runeight]

Quote:

Originally Posted by Uncle Bob /img/forum/go_quote.gif P1P 10K 3/8" Trimmer Farnell Part No 9353186 (Bourns 3296W series) Rapid Part No. 68-1946 (3296W equivalent - TruOhm series) UB PS. my pcb arrived today

Thanks Uncle Bob. I'll upload the new spreadsheet tonight.

Keep us posted on the build.

 

[Ferrari]

Quote:

Originally Posted by wiatrob /img/forum/go_quote.gif More great SOHA II Ancilliary inmpressions: http://www.head-fi.org/forums/f45/11...ml#post4941349 'Monster Bass!'

Bass quality is no doubts a major positive character of this amp.
No matter if I plug in a Philips HP 1000, AKG K 701, Beyer DT 880 (2005) or Sennheiser HD 600, always deep, controlled and very well defined. However I like it most with Sennheiser HD 600.

 

[holland]

wiatrob,

a bit OT, but any direct comparisons with DV, WA6, etc.? Saw some mention relative to EF-1, but not much relative to the other amps present.

Did you personally get to compare to the SSMH? I have my own opinion, owning both, but am interested in hearing others.

Which tube and transistors are you using? I do know the sonics differ drastically with tubes and slightly with transistors, so you can definitely dial down or up certain areas.

Looks like a fun meet.

 

[runeight]

Updated the BoM on the website to include the Farnell and RS part numbers

 

[kklee]

Quote:

Originally Posted by runeight /img/forum/go_quote.gif Updated the BoM on the website to include the Farnell and RS part numbers

For what it's worth, the Digikey P/N for the pot is 3296W-103LF-ND