Hi.
Maybe this topic is better suited to the lab. Move if needed.
So, I have many books on tube circuits but can't find any mention on what exactly is done when running a power pentode in Ultralinear mode. Can someone here help me understand the circuit adjustments (compared to normal pentode circuitry) to achieve Ultralinear mode?
Thx!
U-L topology has been published in many textbooks & audio journals. Google it.
Let me tell you my ears-on experience. Dynaco ST-70 was a U-L topology 50 years ago when it first appeared in the market. I own one.
But frankly I don't like its sound. So I triode-strapped the EL-34 pentodes so that it can be switched
U-L / triode mode with a toggle switch.
When I compared both & I found triode-strapped EL-34 sound so much better than its original U-L mode.
Now my ST-70 has ALWAYS been operating on triode mode since day one after I modified it years back.
c-J
