Kenny Nelson's WOPL 400 conversion.

[laatsch55]

Populating the board tonight.....

 

[laatsch55]

Big caps and some hats and we can stick a fork in this one.

 

[laatsch55]

Board is done.....time to warm up the AP and get some before measurements. Joe, I would like to get some risetime measurements this time. Gonna be around most of the day??

 

[Gepetto]

Yeah for the most part Lee. In the middle of rebuilding my snowblower trannie.

 

[Ken.nelson0317]

Big caps and some hats and we can stick a fork in this one.

Awesome. What a good looking board.

 

[laatsch55]

Yeah for the most part Lee. In the middle of rebuilding my snowblower trannie.

Hmmmm. Get that much snow do ya or is it a goodwill; blower??

 

[laatsch55]

Ken, testing now and you were right she's a sick puppy.

 

[laatsch55]

Here we go....

 

[laatsch55]

Frequency response...

 

[Gepetto]

Hmmmm. Get that much snow do ya or is it a goodwill; blower??

We get a fair amount Lee. It is a 1967 Ariens 9HP, oldie but goodie. Every couple of years, the bearings in the chain sprocket crap out. It is the weak point in the design. If it wasn't for that, the thing would just run forever.

It is a PIA to fix it of course. Thank goodness for Ebay parts availability.

 

[laatsch55]

Agreed on the E-Bay thing. What a godsend for obsolete stuff.

 

[Ken.nelson0317]

Frequency response...

Ok, Lee its learning time for Kenny. Lol. What do the numbers mean or is it too complicated to explain.

 

[laatsch55]

No Ken it's not that bad. The frequency response is expressed in Db from the reference level over a frequency range of 10Hz---80,000Hz. Displays an amps linearity and other quirks. That FR graph is typocal of a stock 400.

The THD & N (total harmonic distortion plus noise) is just what it is expressed in percentage. Channel a is left and b is right. Channel AS is a mess. B isn't bad but it'll get better too.

 

[laatsch55]

Pumper called, gotta go to the field, below 0- and it makes just enough water to F&*^% your world up. See ya in 3 or 4 houirs....

 

[laatsch55]

Back at it.... Ken, what color do you want the lights???

 

[Ken.nelson0317]

Back at it.... Ken, what color do you want the lights???

Think I'll stay with the blue. Thamks for the info on TH and D.

 

[laatsch55]

As Joe has often lamented, "It's the mechanical things" that can throw the whole project into a tailspin.This ewarly a series I does not have the cast bell end covering the tranny, and with the stacked caps I wanted a little more support....

 

[laatsch55]

Ken, the "pig" had the 8 finned heatsink, would you like that instead of the 4 you now have?? I'll trade straight acccross for your's.

 

[Ken.nelson0317]

Ken, the "pig" had the 8 finned heatsink, would you like that instead of the 4 you now have?? I'll trade straight acccross for your's.

Yes sir, I would appreciate that. The 8 fin should be better than the four, shouldn't it?

 

[laatsch55]

Much better. GottA couple wells froze up, see ya in a few.