Menu

Show posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Show posts Menu

Messages - Giulio

#1
To be or not to be this is problem,
the sound is   :duh  "acid" in clean channel... in lead channel, the "distortion" is without bass tone, 4-5-6th strings is same "sounding" of 1-2-3th-strings  :'(
#2
Yamaha has advised me to contact the service center. :trouble
But in fact it is not a fault but a natural characteristic of this amplifier.
A design schematic ? (the only pre-amp) .... I'll see you next year :cheesy:
#3
Yes, at the moment the best thing is to use an external preamp, but it is not convenient  :-\
#4
Hi Roly, Thank you!
Original is a 12ax7w I tried with different types of valve-tube.
noticed a change in volume, but the sound as transistors poor cheapest.  :-\

This amp model TU1280r has been proposed to the European market, probably in the U.S. is a different model code
#5
Thanks for answers.
  I would like to make changes to the preamp to get a warmer sound.
In origin it is very harsh and metallic. (the tube is ok)
I tested an external preamplifier and the sound improves. direct entry into the "return"

http://en.audiofanzine.com/guitar-combo-amplifier/yamaha/1280r-tube-80w/medias/pictures/a.play,m.716654.html

http://en.audiofanzine.com/guitar-combo-amplifier/yamaha/1280r-tube-80w/medias/pictures/a.play,m.641318.html
#6
Yamaha 1280 solid state guitar amp with tube pre section ...Help me, i need schematic diagram or manual service. 
:dbtu:

Thanks