laatsch55
Super Member
As far as I know, when it comes to serial numbers, besides Dean, Ed Blackwood is the AUTHORITY on these questions. If you would post a pic, we could get you an answer.
Phase Linear 400
- Thread starter calman46
- Start date
As far as I know, when it comes to serial numbers, besides Dean, Ed Blackwood is the AUTHORITY on these questions. If you would post a pic, we could get you an answer.
Do you have a pic?
I'm looking at a temperature sensing fan controller and 12 volt fans. It's going to be a few weeks before I know anything.
The controller is on order. I'm assuming PWM for the speed control because linear would produce too much heat.
I see ,thanks . I have the filter cap kit from White Oak its the 33,600uf (2x16,800uf) . Do I need any inrush "protection" here on the AC line?
The bridge rectifier is a KBH2502 , 25A 140v/200v our article author suggest a 40amp 600v . Which doesn't seem like a bad idea . I'm still researching the output transistors . I'm leaning toward using new ones.
The bridge rectifier is a KBH2502 , 25A 140v/200v our article author suggest a 40amp 600v . Which doesn't seem like a bad idea . I'm still researching the output transistors . I'm leaning toward using new ones.
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Uncle Bambi
Funky Tut
I was looking at these, and was just about to buy when I read the description carefully..... these kits will not install in the early versions of the PL-400 that have the main caps mounted directly on the side of the chassis via big round capacitor clamps.
Since that's what I have, I need to go look for replacements that have the same (or nearly the same) dimensions as the originals. I will start looking in earnest after I install the relay kit that I purchased from Don, but if anyone has already found a source I would be very interested in hearing about it.
They say their LED meter light kit upgrade won't work for me, either.
Q5 and Q10 (40327) are not original. The resistors burnt up only after Q5 and q6 failed. Likely this is the result of cascaded failures of the output.
laatsch55
Super Member
I was looking at these, and was just about to buy when I read the description carefully..... these kits will not install in the early versions of the PL-400 that have the main caps mounted directly on the side of the chassis via big round capacitor clamps.
Since that's what I have, I need to go look for replacements that have the same (or nearly the same) dimensions as the originals. I will start looking in earnest after I install the relay kit that I purchased from Don, but if anyone has already found a source I would be very interested in hearing about it.
They say their LED meter light kit upgrade won't work for me, either.
Cornell-Dubilier makes a 18,500 uf 80 volt computer grade cap that fits the original clamps. Could you post a pic of the metyert illumination on your series I, I'm somehat familiar with em.
The later 400's have a pot metal plate about 1/2" thick between the transformer and the chassis. The capacitors are taped to the plate inside the chassis with double sided tape. The stiffness of the transformer leads help keep the caps in place.
I don't think the capacitor mounting makes much difference. The early version has plenty of room inside for a variety of different caps. It's the cost that makes it prohibitive. Do not be tempted to buy cheap caps off EBAY. All I've ever seen are at least 15 years old.
You can turn a 700 Series II into a 700b with the White Oak board.
laatsch55
Super Member
That's a rough lookin board. Swap out the 25 amp BR with a 35, that's plenty. No additional inrush protection is needed. It can handle it just fine.
If you replace outputs, use MJ 15024 as drivers and MJ21194's as outputs, a good combination.