Glen's 700 series II build

So do I........but f#^^&* it....it's Easter at the Hubbards...
 
So after Lee's question I retested
first I checked my resistor and found it was actually 7.22 ohms
so at 100 , 20 and 12 Hz the amp put out 57 volts steady before clip with one Chanel only driven
this should be 450 watts at 7.22 ohms
 
That's what my math works out to also Glen....Good job on the amp. Have you had it on a pair of speaks yet??
 
I agree with Lee. That is one sweet looking amp you have there. The workmanship it top notch - great job Glen.

Did you put heat shrink on the DC protect board standoffs? Keep us posted on any further testing and of course how it sounds.

BTW - nice test equipment.
 
NavLinear said:
I agree with Lee. That is one sweet looking amp you have there. The workmanship it top notch - great job Glen.

Did you put heat shrink on the DC protect board standoffs? Keep us posted on any further testing and of course how it sounds.

BTW - nice test equipment.
Click to expand...

I love his VM's!!
 
NavLinear said:
I agree with Lee. That is one sweet looking amp you have there. The workmanship it top notch - great job Glen.

Did you put heat shrink on the DC protect board standoffs? Keep us posted on any further testing and of course how it sounds.

BTW - nice test equipment.
Click to expand...
Thanks Dennis
Yes I put heat shrink on the standoffs
I elevated the standoffs and spaced control board by about an extra 3/8"
speakers tomorrow and will let you know how it goes
 
laatsch55 said:
That's what my math works out to also Glen....Good job on the amp. Have you had it on a pair of speaks yet??
Click to expand...
Speakers tomorrow Lee
let you know how they sound
after heating it up for a while on dummy load has left me feeling like it should be good to rock and roll with this amp
 
That's been my experience.....it's always a rush to put a new WOPL on the K's and get em LIT UP!!!!
 
laatsch55 said:
What did you have for residual noise Glen?
Click to expand...
Lee I am not happy with distortion results
My hp 334a is old and have not used in many years
It fired up ok
I got .18 % distortion at 50 volts at 200 hz
so followed the service manual and the best I could do was .08% at 40 volts and 2000 hz

I would like better so may take the hp and clean all pots and contacts as it would not quite null signal in setup
 
Yes , the amp is capable of less than that. A residual noise measurement is with one of those fancy voltmeters ya got with the inputs on the amp shorted, then measure AC voltage. Should be in the 200 to 400 MICROvolts...
 
laatsch55 said:
Yes , the amp is capable of less than that. A residual noise measurement is with one of those fancy voltmeters ya got with the inputs on the amp shorted, then measure AC voltage. Should be in the 200 to 400 MICROvolts...
Click to expand...
I have being dying to do something different with them
still thinking about the distortion measurements
I am got to test an other amp to see if they differ
 
As Joe says.....refer to Rule #1------check your test equipment....
 
In a project like these, I find him sitting on my shoulder!!
 
laatsch55 said:
Yes , the amp is capable of less than that. A residual noise measurement is with one of those fancy voltmeters ya got with the inputs on the amp shorted, then measure AC voltage. Should be in the 200 to 400 MICROvolts...
Click to expand...
Lee do I do this with or without a load connect to the output?
I assume I have the volume controls open full, right.
 
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