03-10-2019, 11:58 PM
Hi Sinusoids
Note that an eyelet card layout for the LPSP is available in TUT5 The Standard. The PA for that project is different than the TOT (Tonnes of Tone) PA, the latter which is definitely warmer sounding.
When laying out an eyelet card or any other type of physical circuit construction, try to keep the signal path as straight as possible inasmuch as it should move from one end of the chassis to the other and not cross itself. You should try to follow the Galactic ground scheme shown in TUT3. For example, the 800 has the same tube complement as you intend to employ except for twice as many power tubes, but otherwise, you could use it as a general guide. The preamp would necessarily be different for your project but the overall look will be the same as the 800.
When considering how to assign the physical tube stages to the circuit, the assignment in TOT Fig.4-1 is best. It keeps the signal moving in one direction for the lead sound, which uses all four triodes. The clean sound moves in the same direction but skips two stages.
Note that the TOT PA is 10W, which is fine if you have a couple of large detuned cabinets. You are likely going to find more power is useful if you use other cabinet styles and/or small drivers.Keep in mind that it is better to have too much power than too little as Power Scaling can control loudness in ANY tube amp.
What is the power rating for your 6k6 OT?
As far as adding a presence-resonance circuit, if you are looking at the active circuit in TUT Fig.6-34, this simply goes between the output cap of the preamp and the input stage of the PA.
Note that an eyelet card layout for the LPSP is available in TUT5 The Standard. The PA for that project is different than the TOT (Tonnes of Tone) PA, the latter which is definitely warmer sounding.
When laying out an eyelet card or any other type of physical circuit construction, try to keep the signal path as straight as possible inasmuch as it should move from one end of the chassis to the other and not cross itself. You should try to follow the Galactic ground scheme shown in TUT3. For example, the 800 has the same tube complement as you intend to employ except for twice as many power tubes, but otherwise, you could use it as a general guide. The preamp would necessarily be different for your project but the overall look will be the same as the 800.
When considering how to assign the physical tube stages to the circuit, the assignment in TOT Fig.4-1 is best. It keeps the signal moving in one direction for the lead sound, which uses all four triodes. The clean sound moves in the same direction but skips two stages.
Note that the TOT PA is 10W, which is fine if you have a couple of large detuned cabinets. You are likely going to find more power is useful if you use other cabinet styles and/or small drivers.Keep in mind that it is better to have too much power than too little as Power Scaling can control loudness in ANY tube amp.
What is the power rating for your 6k6 OT?
As far as adding a presence-resonance circuit, if you are looking at the active circuit in TUT Fig.6-34, this simply goes between the output cap of the preamp and the input stage of the PA.