Further upgrading my first built WOPL, a 400 S1 8 fin, with a few goodies.

[George S.]

The 22 AWG bias wires, Phoenix connectors on both ends are a must have. Note the control board standoff screw. Put the KEP nut at the bottom, then the spacer, it'll never come loose again.

 

[gene french]

I install the Phoenix Contact Connectors with the wire openings facing up on the back planes and down on the control board. Take extra care to install them correct the first time.

i am making notes...lol

 

[George S.]

Edge view of the raised wiring harness and those way too large fins. Ridiculous! Pure marketing to sell amps.

 

[George S.]

Edge view of the AC with the zip tie package for size info.

 

[George S.]

So she's back on her feet(Budwig feet I get from Ed in NJ). Going to clean up the bench, install the face plate and RCAs. Then bring her up slowly with the Variac and DBL. Then I'll refer to the WOAD Tech Documents and check bias and DC offset.
Note the "flying" yellow output wires. These carry output to the DCP and then the positive speaker jack posts. They need to be kept away from other wiring and components.
Another thing to especially consider if one is using attenuators, is keeping the right and left channels wired appropriately.
I drilled my S1 faceplate for attenuators because it's pretty rough and I wanted to match my S2, as I wanted to do some home theater type adjusting with REW and MiniDsp 2x4.

 

[George S.]

Still had the tap laying on the bench from my 700 build. 6-32 NC. The socket head screws are 7/64". On a 8 fin there's no room to use a Allen wrench, so I drilled a hole in the end of a old screw driver a pressed in a cut piece of Allen stock. And of course you're going to need a magnet on a stick to fish the transistor into place.

 

[gene french]

i have a boxes of little magnets of varying sizes...just for stuff like this...i tape one to every screwdriver that i use...
i will order a new little cheap set of mini taps....

 

[gene french]

look what i found....
thanks to you...
exact size...

 

[George S.]

look what i found....
thanks to you...
exact size...
View attachment 65722

Cool, superb quality, none better. Just ensure the dimensions are correct for a good fit, along with voltage and capacitance. Nice!

 

[George S.]

When you wire the face plate, place a soft cloth over the heat sinks and place it as so. Once wired, the face plate just flips over into position. This ensures wiring is correct length for future maintenance or upgrades.
I took this opportunity to apply hot glue to the bottom of those meter retaining screws. Worst design ever. Well, maybe not, they could have glued those meters in.

 

[George S.]

After installing the face plate, check all wiring for position. And closely inspect the left meter studs and mounting screws as they are close to the buss bar, aluminum plate, and terminal strip.

 

[George S.]

We'll continue with this next weekend. Time to make a chef salad for dinner. Later!

 

[gene french]

Cool, superb quality, none better. Just ensure the dimensions are correct for a good fit, along with voltage and capacitance. Nice!

the dimensions are exact...

 

[Gepetto]

look what i found....
thanks to you...
exact size...
View attachment 65722

for your 200?

 

[gene french]

yes sir....for the 200....the cap kit i bought from "ed" on ebay did not include the big caps....
the old ones looked nasty....sniff thought they were leaking....i cleaned off dirt dobbers....
so, just to be safe, i will change them...
i am going to give this amp along with a small preamp to my son in law....

 

[George S.]

Found a little more time this evening. Brought her up slowly.

 

[George S.]

Checking bias per the Tech Document. I'll let her sit here and stabilize while I walk the dog.

 

[George S.]

Adjusted bias to .350 VDC for each channel. Checked DC offset, 3 digits to the right of the decimal point is the highest resolution these meters have. Good to go. She'll sit on the bench all week. I'll put her back into the small system and listen to some Allman Brothers Band next weekend. Tomorrows a work day. Later

 

[NeverSatisfied]

Beautiful job George, all the little details add up.

 

[laatsch55]

Meters are twins..