Hi all
powered up my valve power amp this morning to a swishing sound in the left channel and a burning smell . Turned it off within seconds and the speakers thankfully have survived. Taken the lid off and at the base of each valve there are 2 resistors . These have cooked themselves on one of the valves only . Does anyone know valve circuit design , are these a final safety system if a valve goes short or would a faulty valve cause these to burn out ?? They are very low wattage resistors . A bit drastic I know but just wondered if anyone can shed some light on it for me . All was well when I turned it off before the fatal switch on !
Thks Malc
Results 1 to 6 of 6
Thread: Valve amp problem
Hybrid View
-
10-06-2012, 05:15 PM #1Registered
- Join Date
- Jan 2012
- Posts
- 44
- Location
- Essex
- In the Hi-Fi industry?
- No
Valve amp problem
Last edited by Malc50; 10-06-2012 at 05:47 PM.
-
10-06-2012, 07:14 PM #2HiFi Dealer Wammer
- Join Date
- May 2010
- Posts
- 4,922
- Location
- Northampton
- Real Name
- Mark
- Turn Table
- Technics SP-10
- T/Arm & Cart
- Stogi S-12/Koetsu R
- SUT/Phono
- AN S1
- Digital Source 1
- Teac VRDS 7
- Digital Source 2
- Foo mods to vrds.
- Speakers
- B&W DM2a/Target R2
- Pre Amp
- AN M2 Sig
- Power Amp
- WAD Kel80's
- In the Hi-Fi industry?
- Yes
Which valve amp is it?
-
17-06-2012, 10:31 PM #3hup two three four wammer
- Join Date
- Oct 2009
- Posts
- 985
- Location
- London
- Real Name
- James
- Turn Table
- still old and black
- T/Arm & Cart
- yup
- SUT/Phono
- Yes indeed
- Digital Source 1
- Runs Windows 7/64
- DAC
- AN 4.1x sig
- Speakers
- AN-E
- Pre Amp
- Vibe/Pulse
- Power Amp
- Tron
- In the Hi-Fi industry?
- No
Malc, is this the Linear A?
My blind guess is a squiffy valve shorting something. Those crappy EH valves werent my favorites (though brand new). PM me mate
Sent from my GT-I5800 using Tapatalk 2I do not exist
-
18-06-2012, 07:46 AM #4Cogito, ergo doleo.
- Join Date
- Dec 2006
- Posts
- 11,764
- Location
- East Mudlands
- Real Name
- Richard
- Turn Table
- Well Tempered
- T/Arm & Cart
- Transfiguration
- SUT/Phono
- Hashimoto/Art Audio
- Digital Source 1
- RA Opus 21
- Digital Source 2
- Squeezebox
- DAC
- Audiosector with SB
- Integrated Amp
- I think not
- Speakers
- LV OBX-RW
- Pre Amp
- SJS Arcadia
- Power Amp
- 845 SET
- In the Hi-Fi industry?
- No
Many alternatives, but the valve failing internally is one possibility. The resistors are not effectively a fuse, but will usually burn out if excessive current is passed for one reason or another.
The one thing for certain is that unless you really know exactly what you're doing, then just replacing the resistors and bunging a different tube in is not a good idea. In all probability it's a cheap fix, but it needs to be fixed properly.I know that you believe you understand what you think I said, but I’m not sure you realise that what you heard is not what I meant.
-
19-06-2012, 02:32 PM #5Registered
- Join Date
- Jan 2012
- Posts
- 44
- Location
- Essex
- In the Hi-Fi industry?
- No
Hi James
It was I am afraid . Pm sent
Cheers Malc
-
19-06-2012, 07:39 PM #6hup two three four wammer
- Join Date
- Oct 2009
- Posts
- 985
- Location
- London
- Real Name
- James
- Turn Table
- still old and black
- T/Arm & Cart
- yup
- SUT/Phono
- Yes indeed
- Digital Source 1
- Runs Windows 7/64
- DAC
- AN 4.1x sig
- Speakers
- AN-E
- Pre Amp
- Vibe/Pulse
- Power Amp
- Tron
- In the Hi-Fi industry?
- No
Crappy modern production rubbish, why do manufacturers use this shite?
Reply With Quote
Posting Permissions
