Hi to all...

Back with my distortion problem which has been unresolved since the past 4 month... In the last month I reopened the machine two times and found out some strange behaviours. I'd like to have an opinion on that:

- A few weeks ago, after a first check-up, the clipping light shows out for the first time. So the distortion is a clipping problem...

-Probably a crossover distortion problem: the idle current adjustment is set to about 4mV 😉.

However, turning the pot clockwise does not change a lot: I could go all the way up and it would barely go to 6 mV. (I'm avoiding doing that, I know how it is supposed to respond when operating properly, and I know the relative position of the pot when it's set to 18mV. I let it this way to avoid any fireworks. (pointing at about 35-40 minutes...)

Assuming that the pot is brand new, that all the caps have been changed and that the emmitter resistors still shows a good value, what can be the cause of this too low voltage between them when idled?

-The offset is set dead down to 0V

-The distortion occurs sooner or later depending on the level of the input

-The distortion does not occur using headphones and turning off the speakers switch.

-I've reflowed the solder joints, especially under TR207 and TR2011 which showed some cracks...

Thanks to all for your input... 

Guillaume

SOLVED!

... I know it's been almost a year. It's just that I didn't wanted to change the TIPS by myself because of a lack of experience.

The TIPS were the problem indeed. It was not surprising: when I acquired that machine 2 years ago, I could have cook an egg on the right sink... 

All 6 were changed. 

Both amplifiers are now like new...

The combination with the Beogram 8000 is something really powerful: practically no noises during silences and then Bang! when a piece starts it hits you in the face... I'm no audiophile at all, but there's definitely something here...

Having used my Beomaster 2400 since a whole year as a substitute, I'm still amazed when I get back to this mammoth. Though I must admit that the 2400 is really decent, beautiful and reliable...

On a side note: it's strange how some audiophile salesman denigrates B&O here in Quebec... I've been told that the "pivot" on the Beogram 8000 was crap... what was that about??

It reminds me of the useless war between Mac and PC's... If both things exists, that's probably because they both answer a particular need?... Same goes for B&O..

Anyways...

Guillaume

hamacbleu wrote:

Having used my Beomaster 2400 since a whole year as a substitute, I'm still amazed when I get back to this mammoth. Though I must admit that the 2400 is really decent, beautiful and reliable...

Compliments Guillaume, to find the failures and solve the problems, brings more joy to the listening, I have a BG 2404 and I must say it comes very near to my BG 5000 (pizza box) and as you say about your 2400, always reliable and a very good TT. At the moment I am testing MMCs, MMC2 and MMC4s from Axel, I never thought that the difference between MMC2 and 4 would be that big, now I wonder why I ordered 2 pcs. MMC4 and 1 pcs. MMC2, and not 3 pcs, MMC2

hamacbleu wrote:

On a side note: it's strange how some audiophile salesman denigrates B&O here in Quebec... I've been told that the "pivot" on the Beogram 8000 was crap... what was that about??

It reminds me of the useless war between Mac and PC's... If both things exists, that's probably because they both answer a particular need?... Same goes for B&O..

Anyways...

The pivot is perfectly fine, and just don't listen to those nay-say audiofools and incompetent retailers, listen to your equipment and enjoy it!

🙂

Thanks to all of you ! 

Yes.. I do enjoy it! Besides, there's surprising secrets in quebec: I just met a wonderful retailer today with lots of knowledge. Really interesting and formative to hear from people with decades of experience. He had some leftovers...So Beovirus has struck again.. shame on me:

These will be long term projects. The 3000 is a 1st generation one. Beautiful machine, all veneered in teak. 1st time I see one of these for real... I might admit that I'm less impressed by the aesthetic of the 3300. I miss the woodtrim. However, It does reflect the taste of the end of the 80's

Søren: I do have a 2404 too. Got it from a lot and put it in a box. I never used it, the stylus is defective. Though If it's really a good turntable, I might put some effort on it.

Guillaume

hamacbleu wrote:

The 3000 is a 1st generation one.

Are you sure ?
To me it looks as if the FM dial ends at 104MHz but I could be wrong.
Only the first three build series tunes up to 108MHz, from series 4 they end at 104MHz.

Martin

No... I only meant that it was not a 3000-2 but a 3000... I didn't knew about the precisions you gave ..thanks... It goes to 104... What a beautifiul machine! I sanded it and reoiled it.. Looks like it got out of the factory yesterday!

Thanks for sharing, i just ecountered the same problem on my beomaster 8000.

getting quite hot as well on the left side. I allways knew i had to replace trimmers/caps an tips i finally must.