New Member: Planning my PL400 rebuild

[jle]

Skip the 4-fin

I am not sure what you mean. What I own is a 4-fin, but I plan to get a new chassis from Joe. Will that have more fins?

I can't skip the 4-fin -- that's what I've got!

 

[WOPL Sniffer]

Didn't think Joe had 400 Heat Sinks on his site.

 

[WOPL Sniffer]

Since you will be spending well over $1000 in parts and a shitload of labor, go find a worthy 400 with the correct amount of fins, or find a 700 to do. You'll be stuck with a 4 fin 400 all WOPL'd out and can't keep it's cool. Yeah, you may want to keep it for the rest of your life but somebody will have to sell it after that.

A 400 4 fin ain't worth a squirt. 400's are cheap.

 

[jle]

I was wrong -- Joe's chassis does NOT include heat sinks. I have been eyeing an 8-fin 400 for sale but it is lacking one of the four covers for the output transistors, requires a new face plate, and the meters look pretty beat up. "Rode hard and put up wet" as they say in the south. It is tempting to put it together with the 4-fin that I have, but I think I'll keep looking for an 8-fin 400 that has not been run over (yet) by a Mac truck.

 

[mr_rye89]

I'm running a 4 fin, granted it just runs a set of compression drivers, it's never been hot. Even running Dahlquist DQ-10s and my ghetto line arrays I havent felt it get too hot. If you have 4 ohm speakers you might have trouble. you also have to drill some extra holes in a 4 fin to make the backplanes fit.

 

[WOPL Sniffer]

See, the cheap guys will make due. The SMART guys will start with the correct stuff.

 

[WOPL Sniffer]

Hell, it aint my amp. If you want to worry about what it's hooked up to, get an 4 fin, if you don't want to worry about shit, get an 8 fin.

 

[mr_rye89]

Me?! Cheap?! Nahhh......

 

[J!m]

Just put a few inches of water in the kiddie pool and stand the amp fins in the water.

Problem solved!

 

[MarkWComer]

An exhaust fan?
I bought one for my 700.
https://www.amazon.com/AC-Infinity-...&hvlocphy=&hvtargid=pla-4584001436628356&th=1

 

[WOPL Sniffer]

An exhaust fan?
I bought one for my 700.
https://www.amazon.com/AC-Infinity-...&hvlocphy=&hvtargid=pla-4584001436628356&th=1

You gotta a 4 fin 700 Mark???

 

[WOPL Sniffer]

See, the cheap guys will make due. The SMART guys will start with the correct stuff.

YUP!!!

 

[J!m]

What do the smart cheap guys do?

 

[WOPL Sniffer]

What do the smart cheap guys do?

They buy an amp already completed???

 

[MarkWComer]

You gotta a 4 fin 700 Mark???

I like keeping things cool. Longevity…

 

[WOPL Sniffer]

I like keeping things cool. Longevity…

Yeah, that's why we get 8 fin amps.

 

[Mohawk]

Yeah, that's why we get 8 fin amps.

All of my 400's are the "cool" ones...

 

[Mohawk]

All of my 400's are the "cool" ones...

I have always passed on the 4 finners...

 

[MarkWComer]

Yup. The “four finners” looked too old for my liking, preferred the LED display of the series two amps. I left the collector covers off of both. Maybe a bit of heat phobia on my part, I’m a bit Aspergerish/OCD on a number of things.

 

[jle]

Yup. The “four finners” looked too old for my liking, preferred the LED display of the series two amps. I left the collector covers off of both. Maybe a bit of heat phobia on my part, I’m a bit Aspergerish/OCD on a number of things.

Forgive the ignorance, but what are the "collector covers"?

I sympathize about the OCD. I have a related syndrome -- CDO. That's like OCD but the letters are alphabetical they way they were intended to be.