jamato8
Headphoneus Supremus
While I don't expect this thread to get a great deal of response due to the smaller number of 6's out there in relation to other amps, this amp is well worth working with.
The only change I have made so far is to swap out the cathode caps to Black Gate nonpolar 16 volt 470uf (red). The change was larger than I had expected. I have used many types of caps and batteries for bias but this one simple change was the most noticeable I have heard. Why I don't know for sure but I did go from a medium quality cap to a very high one and I changed the capacitance from 220 to 470uf. I have always found 470 to be a standard for cathode bias along with the cathode bias resistor.
Transparency improved along with a noticeable increase in stage width and depth. Bass took on a strong controlled quality and mids, the one area I really wanted to see an improvement, took their correct place on stage. Voices of men and women improved and are very realistic.
****
June 8,
The further modifications can be found in the threads of this post:
A pseudo dual power supply was added with nonpolar Black Gate capacitors
Kiwame resistors are used
and the power supply is a CR(divided for the dual supply)CRC for the power section of the tube and RCR for the driver section. All capacitors are Black Gate
The coupling capacitor is the silver/gold oil .22 capacitor.
edit:
The relative speed of the amp also has increased. There is no smearing of the frequencies with a clean contrast between notes and the rest of the musical spectrum. I am still surprised after many years of working with cathode bypassing that this one small change has made this big of a change. The slight veil that was present is gone.
The only change I have made so far is to swap out the cathode caps to Black Gate nonpolar 16 volt 470uf (red). The change was larger than I had expected. I have used many types of caps and batteries for bias but this one simple change was the most noticeable I have heard. Why I don't know for sure but I did go from a medium quality cap to a very high one and I changed the capacitance from 220 to 470uf. I have always found 470 to be a standard for cathode bias along with the cathode bias resistor.
Transparency improved along with a noticeable increase in stage width and depth. Bass took on a strong controlled quality and mids, the one area I really wanted to see an improvement, took their correct place on stage. Voices of men and women improved and are very realistic.
****
June 8,
The further modifications can be found in the threads of this post:
A pseudo dual power supply was added with nonpolar Black Gate capacitors
Kiwame resistors are used
and the power supply is a CR(divided for the dual supply)CRC for the power section of the tube and RCR for the driver section. All capacitors are Black Gate
The coupling capacitor is the silver/gold oil .22 capacitor.
edit:
The relative speed of the amp also has increased. There is no smearing of the frequencies with a clean contrast between notes and the rest of the musical spectrum. I am still surprised after many years of working with cathode bypassing that this one small change has made this big of a change. The slight veil that was present is gone.
