Odesly lampy? [VYRESENO]
Napsal: 13.09.2013 20:11
Ahoj,
privezl jsem si domu jiz hrane kombo (Peavey Valve king 212). Pred odvozem hralo normalne. Pak jsem ho prevazel asi 70 Km, jel do zkusebny, nechal chvili aklimatizovat (tak 5 minut?), zapnul zhaveni, cekal tak 4 minuty a pak zacal hrat vse slo skvele, zkousel jsem co to umi, jakej to dela kraval atd. A pak najednou ticho. Mrtvej jak zkreslenej, tak cistej kanal. Lapmy vzady svitej, i ty preampovy. Nasel jsem pak vzadu potenciometr, kterym se pripina ze zesilovace AB na zesik A a obracene. (Funkce Texture: plynulý přechod mezi zvukovými a dynamickými charakeristikami zesilovacích tříd A/B a A ) Puvodne to bylo na AB. Otocil jsem potak na A, kombo hraje, oba kanaly. Kdyz ho otocim na AB, tak opet nehraje. Muzou to byt tedy spatny lampy? Jsou tam celkem 4, predpokladam, ze na zesik typu A to jede jen na dve lampy.
Z manualu:
TEXTURE
This new, patent-pending feature available only from Peavey is used to fine-tune the power sensitivity,
response and “break-up” of the power amp section of your ValveKing amplifier. Normal, full-power,
Class A/B operation results when the TEXTURE control is set at its fully clockwise (wide open) position
and should be used as a starting point when setting this control. As the TEXTURE control is rotated
counterclockwise, the effect of one half of the 6L6GC power tubes is progressively subtracted from the
circuit, while the gain of the driver tube is slowly increased. The driver's low-frequency
response is also altered along with the gain, resulting in more even-ordered harmonic distortion from
your power amp, even at lower-than-stage-volume settings. Finally, with the TEXTURE knob in the
fully counterclockwise position, the result is a real single-ended power amp section that operates and
responds exactly like a true Class A power amp, driven by a real single-ended high-gain tube stage.
This setting still allows the unused power tube(s) to draw idle current, thus retaining the efficiency of
the standard Class A/B topology. In this mode, power output is also reduced by as much as 60% versus
maximum rated power.
privezl jsem si domu jiz hrane kombo (Peavey Valve king 212). Pred odvozem hralo normalne. Pak jsem ho prevazel asi 70 Km, jel do zkusebny, nechal chvili aklimatizovat (tak 5 minut?), zapnul zhaveni, cekal tak 4 minuty a pak zacal hrat vse slo skvele, zkousel jsem co to umi, jakej to dela kraval atd. A pak najednou ticho. Mrtvej jak zkreslenej, tak cistej kanal. Lapmy vzady svitej, i ty preampovy. Nasel jsem pak vzadu potenciometr, kterym se pripina ze zesilovace AB na zesik A a obracene. (Funkce Texture: plynulý přechod mezi zvukovými a dynamickými charakeristikami zesilovacích tříd A/B a A ) Puvodne to bylo na AB. Otocil jsem potak na A, kombo hraje, oba kanaly. Kdyz ho otocim na AB, tak opet nehraje. Muzou to byt tedy spatny lampy? Jsou tam celkem 4, predpokladam, ze na zesik typu A to jede jen na dve lampy.
Z manualu:
TEXTURE
This new, patent-pending feature available only from Peavey is used to fine-tune the power sensitivity,
response and “break-up” of the power amp section of your ValveKing amplifier. Normal, full-power,
Class A/B operation results when the TEXTURE control is set at its fully clockwise (wide open) position
and should be used as a starting point when setting this control. As the TEXTURE control is rotated
counterclockwise, the effect of one half of the 6L6GC power tubes is progressively subtracted from the
circuit, while the gain of the driver tube is slowly increased. The driver's low-frequency
response is also altered along with the gain, resulting in more even-ordered harmonic distortion from
your power amp, even at lower-than-stage-volume settings. Finally, with the TEXTURE knob in the
fully counterclockwise position, the result is a real single-ended power amp section that operates and
responds exactly like a true Class A power amp, driven by a real single-ended high-gain tube stage.
This setting still allows the unused power tube(s) to draw idle current, thus retaining the efficiency of
the standard Class A/B topology. In this mode, power output is also reduced by as much as 60% versus
maximum rated power.