[ye.]

  whats the DC on the anodes?

 
around 2-3V while idling (on both channels).

 

[soren_brix]

   
around 2-3V while idling (on both channels).

Have you maxed out the volume control and controlled the volume from the source rather? what levels are the source at?

 

[ye.]

  Have you maxed out the volume control and controlled the volume from the source rather? what levels are the source at?

I tried both versions to exlude a problem with the poti. No difference observed.
The max source level was 1,4V RMS (a Soekris DAC at the raw outputs).
I also had the feeling that the heared volume was lower compared with my SRM-1 Mk2
 

  probably 2sk389GR

Thats a dual jfet in on case. Mine (in a SRM 006t A) look like two TO-92 thermicaly cuppeld with some shrink tube.

 

[soren_brix]

 
I tried both versions to exlude a problem with the poti. No difference observed.
The max source level was 1,4V RMS (a Soekris DAC at the raw outputs).
I also had the feeling that the heared volume was lower compared with my SRM-1 Mk2
 
Thats a dual jfet in on case. Mine (in a SRM 006t A) look like two TO-92 thermicaly cuppeld with some shrink tube.

1.4V RMS will overdrive the input ...from memory 300mV should maxout the amp
 
2sk389 is dual 2sk170 ... you can use lsk170 from Linear - you need to match Idss though ...checkout DIYAudio store

 

[ye.]

  1.4V RMS will overdrive the input ...from memory 300mV should maxout the amp

1.4V RMS at the line input. I doubt that this will overdrive, CD players have 2V RMS. My SRM1-MK2, my power amps nor my (vintage) peramp showed any problems.
 
At least up to 1V RMS the output raises correspondingly to the input on my scope. So the limit is definitely above 300mV. For higher values I need to get an other probe or attenuate the output signal due to limitations of the input voltage of the scope.

 

[soren_brix]

  1.4V RMS at the line input. I doubt that this will overdrive, CD players have 2V RMS. My SRM1-MK2, my power amps nor my (vintage) peramp showed any problems.
 
At least up to 1V RMS the output raises correspondingly to the input on my scope. So the limit is definitely above 300mV. For higher values I need to get an other probe or attenuate the output signal due to limitations of the input voltage of the scope.

Whats the limits of the probes, 300V?

 

[ye.]

  Whats the limits of the probes, 300V?

They are 10x probes, the scope has max 5V/div, and 8 "divs". So I am at about 400V(pp).

 

[soren_brix]

  1.4V RMS at the line input. I doubt that this will overdrive, CD players have 2V RMS. My SRM1-MK2, my power amps nor my (vintage) peramp showed any problems.
 
At least up to 1V RMS the output raises correspondingly to the input on my scope. So the limit is definitely above 300mV. For higher values I need to get an other probe or attenuate the output signal due to limitations of the input voltage of the scope.

 have you checked the caps in the feedback loop? it is an old amp ...

 

[ye.]

   have you checked the caps in the feedback loop? it is an old amp ...

You refer to C5-8 parallel to R21-26 in the SRM T1 schematics?
The SRM 006tA does not have these, only the resistors ... that seems to be one difference in the layout, the only one I discovered up to now, appart of those due to the ballanced input.

 

[soren_brix]

 
You refer to C5-8 parallel to R21-26 in the SRM T1 schematics?

yep

 

[Hardertaskthinking]

Agree, I keep my 009's in a Peli case 24/7.

 
Hi yates7592,
 
Can you tell me the model of your Pelican case?
 
Thank you

 

[ye.]

   ...from memory 300mV should maxout the amp

You are correct after all: http://www.stax.co.jp/Export/SRM006tS.html

So I have a gain problem on both channels, not a distortion problem on one. Thus I have to reconsider a lot of things that I excluded because they would affect both channels.
Thanks.

 

[soren_brix]

  So I have a gain problem on both channels, not a distortion problem on one. 

did you check the caps? 

 

[yates7592]

   
Hi yates7592,
 
Can you tell me the model of your Pelican case?
 
Thank you

Sorry, its a "peli-like" case but not pukka Peli. I bought it on ebay a long time ago and don't have a reference to it now. If you check the Peli chart it should be easy to work out the size you need.

 

[joseph69]

  Dear all,
Can someone point me to an after-market headphone hard case which the SR009 can fit into?  I still have the original wooden case but it looks too delicate to be used on a day-to-day basis.
 
Thank you

Look into the Pelican 1400 case.
I believe this will suit your needs.