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In Reply to: RE: Class of Operation posted by Triode_Kingdom on June 15, 2016 at 06:26:05
No
It isn't a peak transient..I will take a B+ reading but I don't think two different analyzers are going to lie to us..Here is the thing..When using the GZ34,we are running about 473v on the second cap.Running that kind of B+ you can make 48 watts at low distortion with no sweat..I could even go higher but the distortion goes out of sight if you go over 50 watts.
The CJ MV45 amp made 45 wpc with a pair of EL34s.The Macs are monos running 6L6gcs with a boosted B+ and more stable power supply so 48 watts isn't out of the ordinary. Here is the MV50 which is similar to the mv45.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 06/15/16 06/15/16 06/16/16Follow Ups:
Michael, are you saying that B+ under full load is 473V? That would be 100V higher than the factory number. Just to be clear, I'm not questioning your power measurements. I'm just trying to understand how the amp is getting there.
--------------------------
Buy Chinese. Bury freedom.
Here is how it's happening...The 150 ohm resistor was taken out and a 30 ohm choke of .5hy was put in its place..Like the 10 ohm .32hy choke,it didn't really raise the static B+ voltage at that point but what did raise it was putting in the GZ34 which gained us an additional 40vdc. I didn't measure the B+ under full power,but I have to assume that the lower resistance choke is helping maintain the B+ at or near full power levels.
We then also have an amp that was designed to run at 117vac and my AC voltage runs at 121vac on a typical day.That also plays into the equation.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 06/17/16
All I know is what the HP and Tektronix analyzers both told me and both read identical power and distortion readings. I can tell you from experience that any Mac mono amp will beat power and distortion spec when it's running right with fresh stock value components.Just like the stereo CJ MV50 I posted that runs a pair of EL34s makes 45wpc and maybe more on measurement,a Mac Mono can running a pair of 6L6gc black plates with a higher B+ can do that same thing..I will take a dc measurement at the 48 watt rating
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 06/16/16 06/16/16
So, at what power level does grid current begin to flow? This would be across the peaks of course, so at what instantaneous power is grid current starting to flow?
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
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