Quote:Posted by: Chester Posted on: Today at 18:20:06
I had a specific question that leads to a general one:
I had a Raytheon RK60 rectifier in my Torii Jr. that I’d like to try in a SE84UFO25. I looked up the specs for the RK60, but couldn’t make out if it would be okay for the 25th. Will this rectifier work for the 25th and, in general, if a rectifier works for the Torii Jr. would it work in the 25th?
The short answer is yes, and yes. A RK60 is a souped up 5U4G and should be fine in any Decware amp. There are two specs that determine whether a rectifier will "work" in an amp: The size of the first power supply capacitor and the DC current requirement. Most Decware amps have a 47 uF power supply cap, while the amount of DC current required increases with power. FWIW I'm not sure where Sophia Electric got 825 mA of current, that is huge. The manual says 280 mA, which is still considerably more than the Sophia's 160 mA rating IIRC. I believe a UFO needs 70 mA, but whatever it is it is a small compared to the PP amps.
Now, it is important to remember that the datasheet values are a minimum. Some tubes will perform at a much higher level, so when faced with operating a tube beyond the published specs you just have to ask yourself: do I feel lucky? Well, do ya?