A VERY Special Phase Linear 700B.

[laatsch55]

Board is done..

 

[Skratch]

Lee, Do you populate C20 ?

 

[laatsch55]

Yep....1uf 63 volt Poly.

 

[laatsch55]

Been listening to this amp for a day and a half now. Some observations----veru good sounding amp, quiet, clean, and no turn off thump.

 

[orange]

Also gotta plug Dennis(NavLinear) or FaboNav. Gona run his Bias tranny brackets, TO-5 standoffs.

you'd better be careful putting a bracketed biased tranny near Navo...just sayin'

 

[laatsch55]

Time to torture this puppy, The AP is warmingup....

 

[laatsch55]

Joe, how do I set up a rise time on the scope?

 

[Gepetto]

with your sig gen in square wave mode inject a low level square wave to the input. With the amp loaded on the output with your 8 ohm load, you should also see a square wave, not as pretty as the input however. Carefully adjust it so that you get about a 2V P-P output signal

Using your scope measure the rising and falling edge time and voltage from the 10% point to the 90% point. For example if you measure a 1.6V rise in 0.8 microseconds then you will have a 1.6/0.8 = 2.0V per microsecond slew rate. These figures are just for example purposes. Clear?

 

[NavLinear]

Joe, how do I set up a rise time on the scope?

You must correlate the rise time with the event that caused you to trigger as you don't want to trigger prematurely! That would be bad.

 

[Gepetto]

You must correlate the rise time with the event that caused you to trigger as you don't want to trigger prematurely! That would be bad.

Very bad!

 

[NavLinear]

Very bad!

I know.

 

[laatsch55]

Yes Joe, pretty clear. I'll see what I can do here. In due time...NOT prematurely.......

 

[laatsch55]

BTW, Dennis, you've had better avatars. Might be time for a Devlin revue....

 

[NavLinear]

BTW, Dennis, you've had better avatars. Might be time for a Devlin revue....

I have to regress once in a while - otherwise the expectations are too much.

She is straining some - you can see it in her expression. I wonder why.

 

[laatsch55]

What freq Joe and ??

 

[laatsch55]

At 1khz, delta T is 4.2 microseconds,

 

[laatsch55]

Delta V--15.4 volts..

 

[laatsch55]

Frequency Response---typical non-White Oak PL.

 

[NavLinear]

Delta V--15.4 volts..

Gain?

 

[NavLinear]

Frequency Response---typical non-White Oak PL.

Yeah - that does look fugly compared to a WO system.