|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
84.28.50.86
Hello i have these amps, it are the ones without a tube rectifier.
but i have no schematic
Have someone the schematic for me?
Follow Ups:
I'm sure this isn't exact - but I'm pretty sure the Welborn units used Electraprint iron, so it's likely close.
Thanks i find this already
but i have a different input tube the 6n1p
Yes thats the amp i think
but there are no values in the schematic
thank you very much awsjr!
i will check it
the little tube in this amp is not the 6n1p but they put a 6BQ7a in it
is this a better sounding tube?
i have no 6n1p to try it
The 6N1P is a great sounding tube - at first. A number of people have found it to fade within a year of typical use, though. Just reporting what I've heard, I don't have enough personal experience with it to comment on my own.
The 5670 is fairly close, with IIRC the same pinout. On the spec sheet it's quite linear; I like it myself, and it's available in premium forms (GE five star, for instance).
i will order a pair 6n1p
and put them in the amps.
then they are original again
they put Tantalum resistors in and the big (parafeed?) cap is an Obligato
the values are good i think
Just measure the parts in your amp.
I buy these amps and i think it is not original anymore
they used very good components like Shinko resistors and black gate caps
but i don't now if the values are as the original amp used to be
so i will check it with a schematic
R4 and R5 are the only two absolutely critical values. You can tell if the existing values are correct if the 300B is passing around 90 mA. If someone messed with the values, they would have to know what they were doing or the amp would not work.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: