Recent Posts

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21
Amplification (Pre/Power) / Re: Stax DA50 mono amplifiers
« Last post by brenden on March 11, 2018, 02:33:48 AM »
Front .
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Amplification (Pre/Power) / Re: Stax DA50 mono amplifiers
« Last post by brenden on March 11, 2018, 01:08:09 AM »
This is the circuit board  with th excellent   2sk 240 dual fet in can .
   The larger brown  1uf  bypass  caps are gone . They really ruin the sound .  They have been replaced with  .01 uf auricaps . After that simple replacement it is a different amp altogether. Everything improved from bass mids and treble . Much better timbre and detail .
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Amplification (Pre/Power) / Re: Stax DA50 mono amplifiers
« Last post by brenden on March 11, 2018, 12:57:56 AM »
Side view  showing heatsinks . Stax used a liquid sodium cooling system for heatsinks .
     Some of the mylar caps have been replaced with  very rare  Rubycon stlx  film and foil non inductive  caps .
   These are fantastic sounding caps  with extremely low esr and  made by rubycon  as  a high end partner for  their expensive    black gate capacitors  .
 
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Amplification (Pre/Power) / Stax DA50 mono amplifiers
« Last post by brenden on March 11, 2018, 12:26:48 AM »
Stax da  50  mono blocs   now paired  with the Stax CAX  Pro .
   These are the small brother to to my
Stax DA100  full class A amps .
   The DA50 is   50 watts per channel 
   
 Modding has begun and already showing signs of greatness .
   
25
Tubes / Re: Valve operating points for best sound
« Last post by stevenvalve on February 12, 2018, 12:26:46 AM »
Open question regarding 6J5's.  Does anyone have a set of recommended operating points for these valves?  I have the data sheet, but nothing beats actual setups.  They are being used as part of a phono amp with ecc88's upfront and 300B's downstream.
V
I have some tasty 6J5s here rare brown base. Half of a 6SN7. I find with most tubes there is no real set parameter, usually is just trial and error, and you are right there is a sweet spot. That is why a variable resistor is handy. 
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Tubes / Valve operating points for best sound
« Last post by vitavoxdude on February 11, 2018, 08:12:17 PM »
Open question regarding 6J5's.  Does anyone have a set of recommended operating points for these valves?  I have the data sheet, but nothing beats actual setups.  They are being used as part of a phono amp with ecc88's upfront and 300B's downstream.
V
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Amplification (Pre/Power) / Re: Leak Stereo 20 Modifications
« Last post by kajak12 on February 09, 2018, 10:33:41 PM »
I had a 4 Jupiter Copper foil caps laying around so i put them to good use, This leak just did not quite cut it against the other leak, so i installed 4 of these caps and the improvement is substantial. Now it is close, but as i said before its no longer a cheap rebuild.
Whats cheap in audio? ;)
i have no duelunds  :P
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Cables / Re: How much difference could a simple Banana plug make
« Last post by kajak12 on February 08, 2018, 08:49:10 PM »
Hmmm, well they should not sound amazing at all - they should be transparent to the signal passing though them  ;D :D ;) :)
If the signal passing through them is amazing then it must be amazing  ;)
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Cables / Re: How much difference could a simple Banana plug make
« Last post by vitavoxdude on February 08, 2018, 04:20:06 PM »
Hmmm, well they should not sound amazing at all - they should be transparent to the signal passing though them  ;D :D ;) :)
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Cables / Re: How much difference could a simple Banana plug make
« Last post by springcreek on February 07, 2018, 02:15:18 PM »
KL makes some great kit, especially like his RCA connectors.

I bet those banana plugs sound great.

I am using bare Auditorium 23 wire connected directly to the driver, though I am about to move to 16ga Duelund tinned copper. I like that stuff a lot.
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