AudiogoN Forums: I have problem with my Tenor150

I have problem with my Tenor150 - advices welcome

i am experiencing a random waving little high frequency noise in the tweeter of one of my JBL K2S9800, that i tend to believe, comes from my Tenor 150.
Intensity is variable and noise is not always present (usually not there at start and tend to be less present after 4/5 hours).
It is not a uhm (wich is also slightly present).
It does disappear when amp is in mute mode but remains kick and fitting when the amp is in stand alone mode (with no connection to the pre-amp).
Noise has increased in the last days.
When i change the plug orientation noise is migrating from one channel to the other.
Voltage is a stable 240v (with no ground due to the age of the electrical installation)

Thks beforehands for your insights.

I did not get answers from Tenor to the mails sent in the last two months and i understand they have other priorities at the moment but i would really like to have this problem fixed.

Mqg30 (System | Threads | Answers | This Thread)

02-08-05

Responses (1-22 of 22)

Click title to read one, or click date to read all below it.

02-08-05 It is in the audio board - trust me on this one (and it may ... Fmpnd

02-08-05 this never ceases to amaze me. imagine that your $10k plus ... Beemer

02-08-05 Beemer, you could have been kinder to mqg30. the man's hurti ... Metralla

02-08-05 Read this thread (maybe atma-sphere will help): \\http://fo ... Raquel

02-08-05 Hopefully, his wallet or checkbook isn't (won't be) hurting. Rx8man

02-08-05 Hello metralla: in reality i can certainly feel mqg30's pai ... Beemer

02-08-05 Tish, tish, unreliable products are exciting mainstays of th ... Viridian

02-09-05 There's a reason why every company viridian mentioned (inclu ... Onhwy61

02-09-05 Sorry you have a problem mqg30, its a real drag when the rig ... Pops

02-09-05 The british sports car makers out of business, perish the th ... Viridian

02-09-05 Obviously viridian can afford $20k amps that break with no s ... Beemer

02-09-05 Beemer, you can find me on the beach with my transistor radi ... Viridian

02-09-05 Have you tried the dealer where you made the purchase? i'd b ... Dennis_the_menace

02-09-05 Jaguar is not doing well, it's one of the anchors around for ... Tomryan

02-09-05 Go to tenors website. service will be available at the end o ... Saxman2

02-09-05 Beemer, you must be speaking with past horrors in mind; othe ... Howie

02-10-05: Fmpnd
Howie brings up a good point. If ONLY a tube is bad (as opposed to a fuse or resistor in the audio board which took out a tube), then it could explain the intermittent noise and why it gets better over time. Clearly, it is in your amp as that explains why the noise occurs even when the preamp is disengaged and stops when the amp is in mute.

If it IS in the audio board, you will hear a distortion in the treble region especially when acoustic piano music is played.

One thing you could try is to get some spare 12AX7s (the tubes at the front of the amp) and swap them out. These are easy to find cheap tubes. Or you could also buy new 6H30s and/or the other tube (I think it is a 6N6P) and replace them all. If it is NOT the tubes, at least you now have a spare set.

It may be worth a try.
Fmpnd (Threads | Answers | This Thread)

02-10-05 Fppnd, audiogon is definitely a place where you meet both t ... Mqg30

02-10-05 Thanks mqg30. glad to help. i talked to stephan (the main ... Fmpnd

02-10-05 Lots of good points made. i'm glad that mqg30 will be able t ... Beemer

02-10-05 Paul, i wish tenor was 30 miles from my home. ya know, what ... Fmpnd

02-10-05 Another thing to consider is that many respected and suppose ... Howie