Aihe: yamaha t-50 muutos 1 | |
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 17047411.10.2005 20:11:49 | |
Elikäs pitäisi muuttaa yamaha t-50 alkuperäis-vahvistimeksi eli Soldanoksi . Huhujen mukaan pitäisi ottaa yksi vastus pois "jostain"Ja laittaa hyppylanka .En ole löytänyt mitään tarkkaa tietoa asiasta, Tietäisikö joku tämän muutoksen?. Kiitos vastauksista jo etukäteen. | |
 SaBer12.10.2005 09:53:25 | |
Okay Vince, here's the deal on the Yamaha T50 and T100 amps. I did design those amps for Yamaha back in the late '80s. And yes, I did get paid a "healthy sum" for my services (ha,ha,ha!). Design-wise, it's a very good amp - it wouldn't have done me any good to have my name associated with a piece of junk, now would it? Of course Yamaha had certain design features that they wanted to see - but, for the most part, they left how the amp sounded up to me. Therefore, the gain structure, voicing, reverb, etc. are quite similar to what you'll find in my SOLDANO amps. I had nothing to do with the final physical design or production of those amps. Construction and quality-wise, the Yamahas were no SOLDANOs by any means, but they were still fairly well built units. I felt, at the time, they were a good value - they packed a lot of bang for the buck. I should point out, however, that there are a few things that Yamaha did that I wasn't happy about on those amps. First, mainly as an effort to reduce costs, they eliminated the filter choke in the power supply and replaced it with a large power resistor. While this is quite a common and acceptable practice in low wattage amps or preamplifiers, I feel that in higher powered amps it hinders the amp's ability to deliver good, punchy low end at higher volumes. The reason for this is that the resistor causes the high voltage supply to drop, or "sag", during times of high demand (such as "chugging" on the low E string), whereas the choke doesn't. Fortunately, this problem is easily remedied by removing the resistor and wiring in a choke. Any competent tech can handle this job, or you can send the amp out to my shop and have us do it for you. The second thing I didn't like was the choice of speakers in the combo amps. Those amps were equipped with 100w Celestions, which I thought sounded very "stiff" and sterile. My last complaint with those amps is a change that was made to the reverb circuits after the amp went into production. They really screwed things up on that, and to this day I still don't know what the hell they were trying to do. All I know is that it made the reverb very weak and lifeless. I opposed the revision, but they went ahead and did it anyway. The early amps had my original design, and the late amps can be modified to get them back to that design. Google on kaveri. Meni noin minuutti, että löysin tuon. "Kato bassoa soitetaan, muijaa hiplaillaan." -Sam Other | |
| 170474 13.10.2005 19:29:31 | |
Joo olen minä tuon jo lukenut ,mutta ei se siitä selvinnyt .Päätemuuntajan" takaisin kierrossa" on useampi vastus . Ei viitsisi kaikkia irroittaa, kokeilemalla mikä olisi oikea. Kiitos kumminkin. | |
 maza13.10.2005 19:40:45 (muokattu 13.10.2005 19:40:53) | |
Soldano-setä kyllä sanoo tuossa että kysymys ei ole takaisinkytkennästä vaan virtalähteessä (oletettavasti kahden ekan suodinkonkan välillä) olevasta tehovastuksesta, jonka tilalle tulisi kytkeä sopiva kuristin. Joku Hammond 193C ois varmaan hyvä. Mikäli olet epävarma, niin kannattaa viedä sopivaan huoltoliikkeeseen modattavaksi. Jännitteet ovat suuria ja huonollä tsägällä voit tyriä hienon vahvistimen lisäksi itsesi. | |
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