Kitarat: kitarakamat ›

wuchi: Saatan olla väärässä, mutta ymmärtääkseni noi mesan tehonsäädöt ei vaikuta sekä päätteen biasvirtaan että anodivirtaan, joka on aika oleellinen asia pääteasteen soundissa. Kun VVR ja vastaavissa kytkennöissä biasvirta seuraa anodivirtaa, jolloin päätteestä saadaan aidosti matalampitehoinen.
 
Pentodi/triodi -kytkennän ongelma on taas soundin muuttuminen triodiksi kytkettäessä 'pyöreämmäksi' tai se ei ole enää niin napakka.
 
Mutta en tosiaan tiedä varmaksi. Kaikki kehittyy koko ajan ja itse olen puuhastellut enempi noiden perinnevahvarien kanssa.
 
Ymmärrät varmasti teknisestä puolesta enemmän kuin mä. On tässä myös erillinen Variac -kytkin, joka laskee vahvarin jännitteitä, mutta vaikuttaa sitten koko vahvistimen toimintaan. Tässä lainaus manuaalista, jos se kertoo jotain. Pahoittelut pitkästä lainauksesta, mutten viitsinyt alkaa referoimaan suomeksi, kun en teknisestä puolesta ymmärrä yhtä paljon kuin jotkut. Mä ymmärsin sen niin, että kyllä siihen päätteen biasiin jotain muutosta tulee, kun putkiparit on erilailla biasoitu:
 
90W (SIMUL-CLASS : CLASS AB + CLASS A, PUSH-PULL):
 
"The 90 W position (toggle up) is our patented Simul-Class scheme and it delivers the most power with 90 watts of clean, sweet and yet bold power and headroom. In this position all four output tubes are on-line and two different classes of operation are being run simultaneously to create the most musical hundred watt output stage in the business. The outside pair (second from far left and the far right) are wired to Class AB and are running cooler - while at the same time creating the bulk of the horsepower. This modern way of running tubes is more efficient and produces the greatest power with the least heat.
 
The inside pair of tubes run in extended Class A with their reduced bias and are more on all the time, whether there is signal present or they are at rest (when you arent playing). This wiring and bias style puts out less power and creates more heat, but in trade for the lack of efficiency, it features a much smoother clip characteristic and a smoother, warmer sound especially at the onset of clip where the harsher transients can become unpleasant in a Class AB output section. Simul-Class takes care of all that and smooths out the rough edges and re-voices the highs - leaving you with a sweet musical clip in the transition zone and yet plenty of power and headroom. The 90 W (Simul-Class) position is the way to go for most live performance situations where you need headroom for clean chording and tight articulate low end for crunch rhythm along with a sweet, vocal voice with authority for soloing.
 
45W (EXTENDED CLASS A, PUSH-PULL):
 
In this setting only the middle pair of 6L6s are on, and its these that run in the extended Class A with their bias reduced. Thus, they run a little hotter but also smoother, especially across the threshold into clip without sounding harsh. This essentially half-power position is great for pushed rhythm and threshold-of-clip sounds where you want a smooth break-up that is devoid of harshness and a slightly higher region of sparkling top end. It also excels at Blues, Roots and Classic Rock single note solo sounds, where you dont want to saturate the preamp too much in favor of adding some authentic power clip to the character. At gig volumes the 45 watt setting will be well into the power band ensuring that you are playing it old school when it comes to your overdrive."