PL700 Rebuild

[Overundr1]

Board coming along nicely. At the rate I am going should have it done before Musk lands someone on Mars.

 

[Hexis22]

Highly recommend you solder the 3 position Phoenix connector on the back side BEFORE placing the lytic caps.

 

[Overundr1]

Tyty for tip will do so

 

[Overundr1]

Board done. Need to go over all the solder points with my 4x visor and clean the bits of stray flux. Then on to adding transistors to heatsink and wiring things up. Oops, after looking at pic realize will probably get a visit from the all nuts not aligned brigade

 

[Hexis22]

Post a pic of the bottom side, lets see your work...

 

[Overundr1]

Sure, still have to inspect and wash her down but a second set of eyes always welcome.

 

[Hexis22]

First observation, the lock washers go under the nuts not between the screw head and PCB.

Would help to thoroughly clean the board before I could provide further feedback.

 

[Overundr1]

Ty will change them

 

[Overundr1]

Cleaned with 91% isopropyl, of course was out of tech spray again. Anyways changed out the washers. Eagle eyes most appreciated sir.

 

[Overundr1]

Hard to get a clear picture

 

[Gepetto]

 

[Overundr1]

Checked and cleaned some more

 

[Gepetto]

Appears you used K44 rosin core flux Lee. Very tough to clean with alcohol. Multiple washes and copious amounts required. The NoClean 245 washes clean much easier than K44.

 

[Gepetto]

Cleaning is easier if you have one of these hog hair flux cleaning brushes. Very stiff bristles get to the residue.

 

[Overundr1]

Is there a solvent you prefer since I have to order more tomorrow? Will order more aggressive cleaning brush as well. Such an amazing site of helpers this is

 

[Gepetto]

Is there a solvent you prefer since I have to order more tomorrow? Will order more aggressive cleaning brush as well. Such an amazing site of helpers this is

I don't go any stronger than 91-99% isopropyl generally, multiple passes however. 3M Novec in an aerosol can is absolutely the best flux remover ever, but it is very expensive

 

[Overundr1]

That I do have.

 

[Gepetto]

That I do have.

You are fortunate then Lee. I only break my Novec out on special occasions.

 

[laatsch55]

500.00. Gal?

 

[Gepetto]

500.00. Gal?

It is like $38 per 12 ounce aerosol can Lee. Great stuff but not inexpensive. It evaporates crazy fast so it is like watching $$ go into thin air...