Author Topic: WT800 overheating  (Read 416 times)

Offline tunetown

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WT800 overheating
« on: August 26, 2018, 05:47:29 PM »
Hi,
I recently played a friends Eden Traveller and loved the sound so have been on the lookout for an old one to buy. I found someone on Ebay selling an old 1998 WT800 (A version) with a 4ohm D410XLT. I took the plunge after testing for a bit and bought it. Played at bedroom level to find my sound and went to rehearsal. Sounded monster for about 10 minutes then it cut out. I'm running the banana plugs on one side only, not using Bi-amp or Bridged mono.

It felt very hot on the side I was using so switched the plugs to the other side. Same thing happened. Got hot and shut down.

Disappointed, I did some research to discover these things have heat issues. I sent it to my amp tech and asked him to do the Ceramic resister Mod from somewhere on this forum and also reverse the fan. He did that. He tested the fan was working with an external power source, reversed it to exhaust as suggested here as well.

I got it back and tested at rehearsal levels and it shut down again. Obviously a thermostat issue. Thing is, any schematic we find on the internet are all of the "C" version and they are very different amps. When he bypassed the thermostats the fan should have started to work but didn't. I think I would prefer to have the fan on always to try to get rid of the heat from the enclosure but I thought I'd post here to see if anyone has a fix for this amp or a schematic for my tech for an old 1998 "a" version of this amp.

Any help would be greatly appreciated.

Regards
Peter Houghton
Tune Town

Offline Bassmann1968

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Re: WT800 overheating
« Reply #1 on: August 29, 2018, 09:17:37 AM »
Hi Peter and welcome to the Garden!

Did you check the correct thermostate? There are two!
Those thermostates can go bad, I would replace it.
Rock on!
Armin

PLEASE LIKE EDEN ON FACEBOOK!!!
No schematics available!!! Don't ask for it.
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WTP-Pre,1350,WTX260,WT300/400,WT1000,WTX1000N,NAV,WTDI
D112XLT,D210XST,D410XLT,D810RP,DNS410,DNS112

Offline tunetown

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Re: WT800 overheating
« Reply #2 on: August 29, 2018, 04:22:03 PM »
Hi Peter and welcome to the Garden!

Did you check the correct thermostate? There are two!
Those thermostates can go bad, I would replace it.
Rock on!
Thanks Armin,

I had my tech bypass the thermostats, remove the old fan and replace with a 240 volt fan tapped into the switch. The fan now runs all the time when the amp is on. I'd prefer that. Ran it pretty hard last night and seems to be performing as expected.

I'll know more this weekend after a full rehearsal.

Cheers
Peter

Offline Bassmann1968

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Re: WT800 overheating
« Reply #3 on: August 29, 2018, 11:37:54 PM »
Alright,
keep us posted!
Armin

PLEASE LIKE EDEN ON FACEBOOK!!!
No schematics available!!! Don't ask for it.
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WTP-Pre,1350,WTX260,WT300/400,WT1000,WTX1000N,NAV,WTDI
D112XLT,D210XST,D410XLT,D810RP,DNS410,DNS112

Offline tunetown

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Re: WT800 overheating
« Reply #4 on: September 02, 2018, 08:01:43 PM »
No Joy, unfortunately. It lasted longer than before but still shut down from heat even though the fan is always running. I'm lost now as to how to solve this. Can you please advise anything further to do in order to make this amp reliable. It's sounds great when working but not usable for gigs.

Offline Bassmann1968

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Re: WT800 overheating
« Reply #5 on: September 04, 2018, 03:07:49 AM »
What are the values for HV+ und HV-?
Armin

PLEASE LIKE EDEN ON FACEBOOK!!!
No schematics available!!! Don't ask for it.
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WTP-Pre,1350,WTX260,WT300/400,WT1000,WTX1000N,NAV,WTDI
D112XLT,D210XST,D410XLT,D810RP,DNS410,DNS112

Offline tunetown

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Re: WT800 overheating
« Reply #6 on: September 04, 2018, 05:59:00 PM »
What are the values for HV+ und HV-?
Hi Armin,
I will have to take it back to my tech. I'll have him do the measurements. Is there a schematic I can give him for the A version. I'm sure it would be helpful. The Australian distributor, ELFA, sent him a C version, post 2008, service manual but it doesn't really relate. There seem to be a lot of changes. ELFA also advised that they no longer have an authorised service technician in Sydney. This is the first WT800 my tech has worked on.
I appreciate your assistance.
Cheers
Peter

Offline Bassmann1968

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Re: WT800 overheating
« Reply #7 on: September 05, 2018, 02:36:56 AM »
Hi Peter,
I will see what I can do for you.
Eden is not handing out schematics anymore, there might me a chance since it is a old model.
Rock on!
Armin

PLEASE LIKE EDEN ON FACEBOOK!!!
No schematics available!!! Don't ask for it.
;)

WTP-Pre,1350,WTX260,WT300/400,WT1000,WTX1000N,NAV,WTDI
D112XLT,D210XST,D410XLT,D810RP,DNS410,DNS112

Offline tunetown

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Re: WT800 overheating
« Reply #8 on: September 11, 2018, 05:23:33 PM »
Thanks everyone for your support. The amp seems to be testing fine and everything in the right places. It just doesn't like a 4Ohm box hanging off one side and pushed hard. Admittedly the band I'm in are very loud. So it just doesn't cope at 3 quarter levels.
So, I'm thinking of dumping the D410XLT 4 Ohm box and replacing with a D410XLT 8 Ohm box. This way I can mono bridge the 2 sides of the amp and shouldn't need to push the levels so hard.
Does this sound logical?? Will this help with heat?
Your advice is appreciated.
Cheers
Peter

Offline Bassmann1968

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Re: WT800 overheating
« Reply #9 on: September 12, 2018, 09:01:08 AM »
Hi Peter,
if you love the sound of the WT800A and the D410 XLT that is the best way to go.
Rock on!
Armin

PLEASE LIKE EDEN ON FACEBOOK!!!
No schematics available!!! Don't ask for it.
;)

WTP-Pre,1350,WTX260,WT300/400,WT1000,WTX1000N,NAV,WTDI
D112XLT,D210XST,D410XLT,D810RP,DNS410,DNS112

Offline Rip Van Dan

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Re: WT800 overheating
« Reply #10 on: September 12, 2018, 12:26:49 PM »
When you run them like that, be sure to plug one cab into the bridged output and the second cab into the first cab (daisy chain).  That will be the parallel connection that will give you the 4 ohm load.  Be sure you DO NOT plug a cab into each side and turn on bridged.  Only turn on bridged when you have your cabs hooked up through the bridged output. 

Dan
Rip Van Dan
Dan Gracia
'82 US-made Fender Jazz Bass with maple neck
5-string Rogue LX405 Pro (Surprisingly good "no-name" bass)
WT500/800 Highwayman (signature model)
D.N.S 410-8
Line6 X2-XDS wireless
=========
spares:
Eden RS400, GK BK250, GK 115 cab, acoustic B410 cab, Sunn Beta 202 (2x12)

Offline tunetown

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Re: WT800 overheating
« Reply #11 on: September 12, 2018, 04:59:36 PM »
Thanks Armin & Dan,

Dan, I didn't think the A version could handle 4 Ohm from the bridged output. I think I'd be best with only 1 x 8 Ohm box bridged so I could utilise the 2 sides in Mono for more power. I don't want to run 2 boxes.

Thanks again.
Peter

Offline Rip Van Dan

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Re: WT800 overheating
« Reply #12 on: September 12, 2018, 09:38:58 PM »
Holy Crap NO!  The WT800A can not handle 4 ohms bridged. 

If I said it could, I was thinking of the WT800C with the porchlight logo.  I've been answering questions about the WT800C too and I think I got my WT800's mixed up.   

My amp has the same power system and power supply as your WT800A and it ONLY bridges to 8 ohms.  That's because both power sections have to operate at 4 ohms, which is their minimum ohms rating, to produce 8 ohms bridged.  4 ohms bridged requires those two power sections to operate at 2 ohms, which is something the WT800C can do, but the WT800A can not.

I really apologize for any confusion about that.

Dan
Rip Van Dan
Dan Gracia
'82 US-made Fender Jazz Bass with maple neck
5-string Rogue LX405 Pro (Surprisingly good "no-name" bass)
WT500/800 Highwayman (signature model)
D.N.S 410-8
Line6 X2-XDS wireless
=========
spares:
Eden RS400, GK BK250, GK 115 cab, acoustic B410 cab, Sunn Beta 202 (2x12)