phase linear 400

gene french said:
i dont understand....
did i do something wrong???
what are ofp plugs??
which sockets??
enlighten me....please
Click to expand...
Organic Fiber Plugs which plug the end of the socket holes to prevent solder from entering the sockets during installation. They usually stay in place until the output transistors are installed and then push them out.
 
I think OFP means Organic Filler Plugs. The fiber plugs that are in the gold cups. They get pushed out when a output is pushed in .
I see two things. More penetration of the solder on the PEM nuts would be desirable. Really shouldn't be seeing that gap on the Secondly, you've installed your bias transistors. Hopefully you've left the legs long as the body fits in the original P straps. (Joe just posted about this as I was typing this).
 

Attachments

  • PXL_20220605_214144568.jpg
    PXL_20220605_214144568.jpg
    2.4 MB · Views: 13
Gepetto said:
Organic Fiber Plugs which plug the end of the socket holes to prevent solder from entering the sockets during installation. They usually stay in place until the output transistors are installed and then push them out.
Click to expand...
i soldered them with some old to3s i have around...
i did not get solder in there....
 
George S. said:
I think OFP means Organic Filler Plugs. The fiber plugs that are in the gold cups. They get pushed out when a output is pushed in .
I see two things. More penetration of the solder on the PEM nuts would be desirable. Really shouldn't be seeing that gap on the Secondly, you've installed your bias transistors. Hopefully you've left the legs long as the body fits in the original P straps. (Joe just posted about this as I was typing this).
Click to expand...

are you talking about the gap on the opposite side of the board??
 
The P strap in the photo is original to the amp and gets reused. There is a PDF that explains this. Also on my 700 Pro build thread I discussed bending the leads to 90 deg versus just bending the transistor over, Mark L's method
 
yes, i am ok....just another obstacle to over come...
should i use these new clamps and extend the legs on the transistor??
or wait and use one of the older ones??
i dont see why i just dont use these new ones...
these are just spares for the 400c board with original backplane on my original 400 that i am not going to modify...
if i need these in the future, i can use the old clamps of the bias transistor that i am changing out????
what u think??
 
Gene, I sit the backplane into the chassis and secure it with two Assembly Aid Bolts after installing the screw and spacer the P strap is secured to. This is a "mock up". When all looks good I tack solder the legs, disassemble it, and finish soldering. I make sure the leads protrude the correct length on the backside of the board. Probably easier to just solder them in and bend them over, but I'd rather take extra time and mock them up
Installing the bias transistor is the last thing I do to the backplanes before installing them onto the chassis and securing them with the Assembly Aid Hardware.
 
Linda, a 400 S1, note the bias transistors and PEM nuts.
 

Attachments

  • PXL_20220522_165345484.jpg
    PXL_20220522_165345484.jpg
    2.8 MB · Views: 17
You must log in or register to reply here.
Back
Top