Tubes Asylum Questions about tubes and gear that glows. FAQ |
|
In Reply to: Re: Audible Differences: EL34 vs 6550 - yeah just a little! posted by Sgt. Karj on March 20, 2002 at 17:05:16:
Not too worried about it, really. I don't listen at earth shattering volume levels. The 6550's push the LSi9's at 4-ohm very, very well. The JoLida amps have both 4 and 8 ohm outputs.Like I said in my e-mail to you, I am not sure how safe running the EL34's cool is (one would assume this would be perfectly fine), but I did listen at around 15mv for a few minutes and noticed some pleasing differences in the sound.
JoLida needs to get their ducks in a row when it comes to their people telling folks that the 502A will work with EL34's... apparently Mike Allen is wrong, according to a rep there, and the 502A/502B need a resistor change to properly bias for both 6550's and EL34's. Luckily, it's a very, very simple swap.
R14 and R15 need to be changed from 22k ohm to 13.3k/14k ohm for each channel. After this, I have been told, you will be able to bias for each type of tube.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Audible Differences: EL34 vs 6550 - yeah just a little! - DevoX 17:48:10 03/20/02 (1)
- Re: Audible Differences: EL34 vs 6550 - yeah just a little! - Sgt. Karj 20:23:45 03/20/02 (0)