Eden WT 800...Hot? Farting Out

[SJan3]

Originally Posted by Stone Soup

Have you ever stopped to consider the fan you reversed might have been intended to blow air on something?

Eden claims that reversing the fan improves cooling about 10%. They recommend this process for earlier units installed blowing inward. They now prefer the fan sucking out the hot air.

[Already In Use]

Originally Posted by Stone Soup

Have you ever stopped to consider the fan you reversed might have been intended to blow air on something?

Yes. This was an Eden recommended mod. My 800 is dated 1997. plus I made a number of new holes in both the Eden case and my road case wihch is pretty tight. Thanks for the head up man...appreciate it.

[Stone Soup]

Originally Posted by SJan3

Eden claims that reversing the fan improves cooling about 10%. They recommend this process for earlier units installed blowing inward. They now prefer the fan sucking out the hot air.

Great. I wouldn't want to think someone would make a stupid mistake with his gear, but it happens. Just trying to help.

[dalahorse]

Originally Posted by MuthaFunk

http://ivanrichards.com.au/2012/10/0...t800-bass-amp/

Is it just me, or does that soldering job look... Um... Well, the PCB looks a slight bit charred to me.

[MuthaFunk]

Originally Posted by dalahorse

Is it just me, or does that soldering job look... Um... Well, the PCB looks a slight bit charred to me.

The soldier work was done on the opposite side that you can't see in the pic. The original soldier looks like it was charred from the heat generated by the actual ceramic resisters. The article states they think the resisters got so hot they melted the soldier themselves while being used. Not ideal soldiering conditions.

[Already In Use]

Originally Posted by Stone Soup

Great. I wouldn't want to think someone would make a stupid mistake with his gear, but it happens. Just trying to help.

Understood and appreciated.

[ugly_bassplayer]

I would love to mod mine to get some speakon connectors on,

[Mykk]

Originally Posted by ugly_bassplayer

I would love to mod mine to get some speakon connectors on,

I'd really like to do that for my Mesa M-2000 too

[dalahorse]

Originally Posted by MuthaFunk

The soldier work was done on the opposite side that you can't see in the pic. The original soldier looks like it was charred from the heat generated by the actual ceramic resisters. The article states they think the resisters got so hot they melted the soldier themselves while being used. Not ideal soldiering conditions.

Oh goodness! That does seem like a significant design flaw, then. Yikes!

[ugly_bassplayer]

That mod looks awesome, I already sent an e-mail to m y tech to get an estimate. Ever since it crapped out on me I'm a little hesitant to play gigs with just that head.

[Already In Use]

I took the 800 and hooked it to a 2 10 and a 1 18..worked it hard enough for the fan to come on...lots of warm air blowing out...but the fan hits the case...so apart it comes..No quirks or what I called farting out..I'll try our next rehearsal with it..Regardless I will get that heat sink mod done..I'm going to call Eden(for what its worth on Monday).

[Already In Use]

Something else for the WT800 owners. There is a small transistor right nest to the input jack. Mine was bent and touching the spring clip on the input jack. I pushed it over away from it and the hiss at gain's past 12 o clock went away. Cant wait to get this unit into the shop. Been on for hours playing on and off w/o any problems..no more fan rubbing either..one of those tiny washers glued to the fan housing must have popped off..it was in with the blades...bless the folks that are pros working on these things!

[MrLenny1]

My Eden issue.
I ran my WT400 thru an Acme 2x10, 4 ohms for a few years. It went into thermal shutdown twice. 10 minute cool down & amp was up and running fine.The DI continued to work to PA. Chassis was very hot to the touch. I was told to run my master flat out because the cab had an SPL 93, (inefficient).
Replaced it with a Eden 2x10, SPL 104. Chassis was slightly warm but never got very hot like the Acme load.
They are sensitve to heat and the thermal shutdown protects it from damage.

[iwearpumas]

That happens to me. I play in church and when I play hard, my amp gets hot and the tone changes. What I do is turn it off in between songs. I wish I played closer to the window so I can just open it and let the cold air circulate through the amp.

[Already In Use]

So far so good...new tube installed(unknown if the old one was bad as I changed several things at once)..The amp has been hot enough for the fan to kick on quite a bit...plenty of warm air blowing out the back(fan reversed)..The extra holes along with the holes in my road case are helping. I drilled a sequence of holes along the front edge of the black case cover about 2 inches apart..then drilled holes(all about 5/16in) right above those heat prone resistors...matched holes in my road case with the black case cover factory slots and my new holes..I figured air cool air would be sucked in all around and blown out the back. Have good airflow now.

Question?? Has anybody bi amped their WT800 running say a single 4 10 on the amp out jack and a pair of 18 inch subs on the low out jack? All 8 ohm cabs? Or would the unit be limited to only 2 8 ohm loads...or can use both amp outputs in Bi amp mode along with the low out jack? Been messing with one 18 sub since the "fix attempt".

[MuthaFunk]

I just took apart my WT400 and checked those connections. I haven't used it much in the last two years but it got heavy duty use for 12 years prior. 3 gigs and often 2 loud practices a week. Sure enough, the board is blackened around those resisters and the connections look poor. I took them off and will be ordering new higher power rated 500 ohm resisters to mount in the chassis and connect with flying leads instead. This amp has been rock solid and I plan on keeping it that way. I'd really recommend you have your tech perform the Pre-amp power resister mod if you like the amp and see yourself keeping it for a lifetime. It shouldn't cost much as its very easy to get to and parts should be reasonable. I'm also going to replace the Ziener diodes beside the resisters as they look like they have taken on some serious heat just by proximity. They'll be cheap as well.

As for your cab question there were a few revisions to the WT800's power section where they changed (improved) the minimum impedance each side could handle. I'd suggest checking out the appropriate manual to see or go over to the Eden forum where those guys know what rev can do what.

[Already In Use]

Thanks...I plan on having the mod done as per Ivan Richards directions right after the show we do on the 12th. I'll check with Eden regarding the cab question. It's something needed...just experimenting. I took a peek under the pre amp circuit board with mirror. Couldnt see very well so I dont know if those soldered connections are compromised. I do plan on keeping my amp. Its a 97 model. I love the sound and the versatility of the unit.

[MuthaFunk]

Originally Posted by Already In Use

Thanks...I plan on having the mod done as per Ivan Richards directions right after the show we do on the 12th. I'll check with Eden regarding the cab question. It's something needed...just experimenting. I took a peek under the pre amp circuit board with mirror. Couldnt see very well so I dont know if those soldered connections are compromised. I do plan on keeping my amp. Its a 97 model. I love the sound and the versatility of the unit.

The connections may be ok if it was never left on without being used. The largest problem is when the amp is left on while not pumping bass. The cooling fan is controlled by the output transistors heatsink temperature. The tube and dropping resisters generate heat the whole time the amp is on but not enough to passively heat the main heatsink up enough to turn on the cooling fan.

[Already In Use]

I talked to Eden this am. They claim there are not any heat related solder point failures they know about reagrding the WT800...however...the mod to move air is to reverse the fan and cut the fan hole slots out leaving one clear opening...covering it with one of those wire computer fan covers...curious??

Also learned that in bi amp mode I can use both channels...I can run a 4 10 bi amped with an 18 inch sub and run a full range amp out right channel down to 4 ohms..another 8 ohm 18 sub there...Gonna try 2 18 inch subs and the 4 10...also learned I can use the headphone jack as a line out to run whatever thru another power amp..pretty coll stuff IMO..Peace'

BTW Eden USA is 1 800 877 6863...was tough to find that number.

[MuthaFunk]

Originally Posted by Already In Use

I talked to Eden this am. They claim there are not any heat related solder point failures they know about reagrding the WT800...however...the mod to move air is to reverse the fan and cut the fan hole slots out leaving one clear opening...covering it with one of those wire computer fan covers...curious??

Also learned that in bi amp mode I can use both channels...I can run a 4 10 bi amped with an 18 inch sub and run a full range amp out right channel down to 4 ohms..another 8 ohm 18 sub there...Gonna try 2 18 inch subs and the 4 10...also learned I can use the headphone jack as a line out to run whatever thru another power amp..pretty coll stuff IMO..Peace'

BTW Eden USA is 1 800 877 6863...was tough to find that number.

I used to bi-amp a pair of 8 ohm 115 cabs with a matching 8 ohm 410 off of a GK 800RB. The sound was huge!! There's something unreal about all that cone area to produce the wall of sound. It really took full advantage of the 400 WRMS the GK put out. I really had a lot of fun gigging that amp but moving it wasn't so much fun.

I'm sure the WT800 will just destroy with a pair of 18's and a 410. Enjoy!