Glen's 700 series II build

[laatsch55]

What's at 20hz...or 10hz?

 

[grapplesaw]

What's at 20hz...or 10hz?

We have yet to do those test yet

got yard work to do

here is the shots of it put together

 

[laatsch55]

So do I........but f#^^&* it....it's Easter at the Hubbards...

 

[grapplesaw]

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

 

[laatsch55]

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??

 

[laatsch55]

Pretty, pretty amp Glen....

 

[NavLinear]

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.

 

[laatsch55]

Heatshrink on the standoffs??? Nota bad idea Dude!!

 

[laatsch55]

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.

I love his VM's!!

 

[grapplesaw]

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.

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

 

[grapplesaw]

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??

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

 

[laatsch55]

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]

What did you have for residual noise Glen?

 

[grapplesaw]

What did you have for residual noise Glen?

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

 

[laatsch55]

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...

 

[grapplesaw]

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...

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

 

[laatsch55]

As Joe says.....refer to Rule #1------check your test equipment....

 

[grapplesaw]

As Joe says.....refer to Rule #1------check your test equipment....

Murphy is hiding everywhere!!!

 

[laatsch55]

In a project like these, I find him sitting on my shoulder!!

 

[grapplesaw]

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...

Lee do I do this with or without a load connect to the output?
I assume I have the volume controls open full, right.