[jdkJake]

Very Cool. Adds tons of personality.
 
Those are some huge conical bumpers you got there as well!

 

[sachu]

Yeah..Justin at  headamp hooked me up with those. I love them.
 
The amp sounds pretty rough right now..Needs to burn in. Atleast a good 2-3 hours.  The tubes are NOS as well . So far its decent but not up to the level I expect this amp to be performing at. 

 

[jdkJake]

What gain settings are you going with?

 

[sachu]

using standard of 11 so far..I have them socketed. This works fine with the LCD-2..but for the wharfedale I still need to crank it to over 12 o clock to similar listening levels as on the LCD-2  ( 9 o clock for the lcd-2)

 

[BoilermakerFan]

Looks great Saachi.  I've heard of a tuning fork before, but never a tuning spoon.
 
The closest MOSFET to the 2238/968 are the Toshiba 2SJ313/2SK2013s. 
 

 

[ujamerstand]

Those mosfets are mighty expansive. >.>

 

[BoilermakerFan]

Quote:

Those mosfets are mighty expansive. >.>

I paid $2.50 or $5 each.  I forget.  Brought in 30 pairs from China through a trusted source on diyAudio.  Also brought in 120 pairs of the SJ74/SK170s for all the amps and phono stages, upgrades for my Yammie receiver and a few other projects.  Both sets of Toshibas will be going in all my Cavalli Audio amps except the Liquid Lightning. 
 
Saachi had a quad, but let the fairies out of one set. 

 

[ujamerstand]

Ah diya, what a great place. You can always find a lot of good parts for sale in the swap section. 

 

[BoilermakerFan]

Quote:

Ah diya, what a great place.

Yep, I'm a fanatic sponsor over there and I'll have an article or two in the newsletter within the year. 
 

 

[cobaltmute]

Last Proto up and running, and in need of a permenant case.
 

Still need to get the e12s into the circuit and I will be good. "Cased" it up this way to see what the fit would be like on a 12"x12" base.
 
Have a hum issue I need to track down in the right channel, goes away as the volume goes up.
 
Have Tons of detail, gobs of bass.  Little too bright in the high end for my personal taste, but am going to wait and see what happens with regards to that as things burn in.  I also have the OL gain to play with (as well as possibly changing output transistors).

 

[BK_856er]

 
Quote:

If your line voltage really is 115 and generally stays in that vicinity then the 30V SUMR is probably the right choice.

Thanks for the confirmation.  Heard back from Richard today and ordered the 30V SumR p/n RC0050 051 8.
 
BK

 

[jdkJake]

Looking good cobaltmute.

You might want to try the alternate grounding scheme Alex posted on his site. I had a slight hum until I went with that scheme.

I also think you will find the OL gain setting has a pretty dramatic effect on the overall sound. You can really tame the highs and reduce the bass by adding more NFB to the mix. I am finding less NFB makes for an exciting sound, but, not always the most compelling. The 'as built' settings are pretty much spot on for a good overall balance.

 

[cobaltmute]

The thing about the hum is that it is inversely dependent to the volume.  Pot all the way down and the hum is loud.  Gets quieter until about the 10:30 position where it "clicks" off - it doesn't just fade away.
 
I've got 10K resistors in for setting the OL gain right now. 

  An exciting sound that some would like, but I prefer a bit more laid back presentation..

 

[Beefy]

Could it be oscillating depending on source impedance?

 

[cobaltmute]

Possibly.  But I don't have a scope and it sounds like a power supply kind of hum.