Just made my own today, since the original is not in store yet
More or less as 6L6 original design, and I followed the published original schematic.
I'm looking forward to see the populated board
Ok, final measurements, with 112ma bias
Vout max, no load 9V, 32R load 6.46Vac (17Vp-p), Vin max 1.13V
Gain: 15.7dB
BW: 6Hz to 247Khz (ref 1Khz, -3dB BW)
THD (into 32R load, 2Vout): 0.01% (1Khz), 0.008% (10Khz)
THD (into 32R load, Vout max 6.46V): 0.004%
Noise: 0.2mVac, input to gnd, no load
All in all these are excellent specs, reflecting a very well engineered circuit.
Now time to complete the chassis
Vout max, no load 9V, 32R load 6.46Vac (17Vp-p), Vin max 1.13V
Gain: 15.7dB
BW: 6Hz to 247Khz (ref 1Khz, -3dB BW)
THD (into 32R load, 2Vout): 0.01% (1Khz), 0.008% (10Khz)
THD (into 32R load, Vout max 6.46V): 0.004%
Noise: 0.2mVac, input to gnd, no load
All in all these are excellent specs, reflecting a very well engineered circuit.
Now time to complete the chassis
Chassis completed. Working fine. First listening, very direct sound, fast, but analytic, It is not a forgiving amp so far.
Now time for some burning Tried it with AKG702 & Sennheiser HD600.
You can see a little heatsink was added just in case, but the standard heatsinks seem to be fine for 112ma bias...
Noble volume pot, Mogami internal wires, Vishay CFM55 resistors in the signal path, Solen MKP 1uF coupling cap, Panasonic FC electrolytic. Nothing fancy really...
BTW I'm using not K2013/J313 but FKP3P20/FKP4N20 Mosfet
SB
Now time for some burning Tried it with AKG702 & Sennheiser HD600.
You can see a little heatsink was added just in case, but the standard heatsinks seem to be fine for 112ma bias...
Noble volume pot, Mogami internal wires, Vishay CFM55 resistors in the signal path, Solen MKP 1uF coupling cap, Panasonic FC electrolytic. Nothing fancy really...
BTW I'm using not K2013/J313 but FKP3P20/FKP4N20 Mosfet
SB
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