I replaced the 4 power KT88's with a set of Gold Lions and of course I checked the bias. As far as the variac is concerned, many Chinese amps and also older designed US amps are designed to run on 110v. Most Wall sockets today are 120v, tho this may be vary some depending on where you are (mine runs from 120v to as high as 125v. I have talked to several techs over the years who say these types of amps should always be run with a variac to keep the voltage under at least 115v.
Tube amp repair.
Hi, my name is Brian and I'm new to to the site and forums in general so let me know if there is somewhere else I should be asking this question.... My 1st tube amp was a Chinese Yaquin MC-100SE (ya I know, that's my problem right there, lol) that sounded pretty decent at first then started occasionally red plating the kt88 tubes. At the time I also did not know about using a Variac so this could could have started the problem or it it could just be a 50 lb paperweight. Anyway I'm wondering if anyone knows of someone in Minnesota (preferably SE Mn) who does tube amp repair. The thing has been taking up space for a few years and I'm trying to figure out what to do with it. Not sure it's worth the cost of sending it anywhere but thought if there was someone within drivin distance that would take a look I might do that.
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- 8 posts total
- 8 posts total