Problem With Powertubes |
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Nov 15 2007, 02:43 AM
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QUOTE (Constie @ Nov 15 2007, 02:29 AM)  Hi there I have a problem with my all-tube amplifier. Maybe you know what's the problem, if not I'll visit the technician. So the first powertube is just glowing a little. But every second one is glaring like a glow-lamp. Which is right? I noticed that as I was changing preamptubes to fix a problem. Do you know what to do? Uneven bias maybe? -------------------- My bands homepage
All time favourites: B. Streisand - Woman in Love, M. Hopkin - Those were the days, L. Richie - Hello |
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Nov 15 2007, 03:05 AM
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I think MickeM is right here about the bias. I'd take it to an amp tech and get them to give the power amp a check over. Might need something like a re-bias or new power tubes.
Cheers, Tony -------------------- Get your music professionally mastered by anl AES registered Mastering Engineer. Contact me for Audio Mastering Services and Advice and visit our website www.miromastering.com
Be friends on facebook with us here. We use professional, mastering grade hardware in our mastering studo. Our hardware includes: Cranesong Avocet II Monitor Controller, Dangerous Music Liasion Insert Hardware Router, ATC SCM Pro Monitors, Lavry Black DA11, Prism Orpheus ADC/DAC, Gyratec Gyraf XIV Parallel Passive Mastering EQ, Great River MAQ 2NV Mastering EQ, Kush Clariphonic Parallel EQ Shelf, Maselec MLA-2 Mastering Compressor, API 2500 Mastering Compressor, Eventide Eclipse Reverb/Echo. |
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Nov 15 2007, 03:07 AM
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Yeah,bias or replacing the tubes.
-------------------- Youtube
MySpace Website Album "Let It Out" on iTunes and CD Baby Check out my video lessons and instructor board! The Pianist tune is progress,check it out! "ok.. it is great.. :P have you myspace? Can i to personalize this for you guy?" |
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Nov 15 2007, 03:14 AM
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Can someone give you tubes to try them,a friend or som?
That's pretty heavy to carry around... 
-------------------- Youtube
MySpace Website Album "Let It Out" on iTunes and CD Baby Check out my video lessons and instructor board! The Pianist tune is progress,check it out! "ok.. it is great.. :P have you myspace? Can i to personalize this for you guy?" |
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Nov 15 2007, 03:26 AM
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Mismatch in Ohms between amp and cabinet might cause lacking in amp's work/power,
but I doubt It has something to do with glowing of tubes... Tony,Andrew,MickeM? -------------------- Youtube
MySpace Website Album "Let It Out" on iTunes and CD Baby Check out my video lessons and instructor board! The Pianist tune is progress,check it out! "ok.. it is great.. :P have you myspace? Can i to personalize this for you guy?" |
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Nov 15 2007, 03:40 AM
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QUOTE (Muris @ Nov 15 2007, 03:26 AM) Mismatch in Ohms between amp and cabinet might cause lacking in amp's work/power, but I doubt It has something to do with glowing of tubes... Tony,Andrew,MickeM? What rhyme did Andrew teach me before? bla bla bla dn your head will fry. lol, I will look it up. "Speak too high and your head will fry", i remembered, thanks Andrew lol Which should mean that if the speaker Ohm is too high the head may get damaged. (Right, master?) No glowing tubes though, I don't think so. ??? -------------------- My bands homepage
All time favourites: B. Streisand - Woman in Love, M. Hopkin - Those were the days, L. Richie - Hello |
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Nov 15 2007, 03:53 AM
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 Great rhyme
-------------------- Youtube
MySpace Website Album "Let It Out" on iTunes and CD Baby Check out my video lessons and instructor board! The Pianist tune is progress,check it out! "ok.. it is great.. :P have you myspace? Can i to personalize this for you guy?" |
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Nov 15 2007, 05:45 AM
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Yes if the speaker load is incorrect then you will have problems. Too high and presumably the second output coil of the transformer can overload and might fry the power tubes. But I think the load your talking about to do that is significant. I don't see why it would be some rather then all the tubes that are acting up that sounds more to me like a balance problem. I'd take it off to a tech to be sure. Andrew would know more though then me.
Cheers, Tony -------------------- Get your music professionally mastered by anl AES registered Mastering Engineer. Contact me for Audio Mastering Services and Advice and visit our website www.miromastering.com
Be friends on facebook with us here. We use professional, mastering grade hardware in our mastering studo. Our hardware includes: Cranesong Avocet II Monitor Controller, Dangerous Music Liasion Insert Hardware Router, ATC SCM Pro Monitors, Lavry Black DA11, Prism Orpheus ADC/DAC, Gyratec Gyraf XIV Parallel Passive Mastering EQ, Great River MAQ 2NV Mastering EQ, Kush Clariphonic Parallel EQ Shelf, Maselec MLA-2 Mastering Compressor, API 2500 Mastering Compressor, Eventide Eclipse Reverb/Echo. |
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Nov 15 2007, 05:56 AM
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QUOTE (Muris @ Nov 15 2007, 03:53 AM) Great rhymeWe will soon all start talking in rhymes, we're all members of musician's community after all!
-------------------- "It isn't how many years you have been playing, it's how many hours." -- Prashant Aswani "PRACTICE, PRACTICE, PRACTICE!" -- Michael Angelo Batio Check out my video lessons and instructor board! |
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Nov 15 2007, 06:08 AM
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Where's Andrew btw???
EDIT Oh yeah,told me about moving to his own house,congrats tho Andrew!!! 
This post has been edited by Muris: Nov 15 2007, 06:09 AM -------------------- Youtube
MySpace Website Album "Let It Out" on iTunes and CD Baby Check out my video lessons and instructor board! The Pianist tune is progress,check it out! "ok.. it is great.. :P have you myspace? Can i to personalize this for you guy?" |
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Nov 15 2007, 10:28 AM
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QUOTE (Muris @ Nov 15 2007, 12:08 AM) Where's Andrew btw??? EDIT Oh yeah,told me about moving to his own house,congrats tho Andrew!!! I'm here - was travelling on business today! House move is tomoorw and Saturday Anyway, MickeM remembered the rhyme right! If the glow is coming from anywhere but the heaters that is very bad and could be down to bias problems. However, if they are different tube types between pre and power they may well glow different amounts. Bottom line sadly is take it to a tech to be sure ... -------------------- Check out my Instructor profile
Live long and prosper ... My Stuff: Electric Guitars : Ibanez Jem7v, Line6 Variax 700, Fender Plus Strat with 57/62 Pickups, Line6 Variax 705 Bass Acoustic Guitars : Taylor 816ce, Martin D-15, Line6 Variax Acoustic 300 Nylon Effects : Line6 Helix, Keeley Modded Boss DS1, Keeley Modded Boss BD2, Keeley 4 knob compressor, Keeley OxBlood Amps : Epiphone Valve Jnr & Head, Cockburn A.C.1, Cockburn A.C.2, Blackstar Club 50 Head & 4x12 Cab |
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