donsachs
Responses from donsachs
| Linlai KT88 experience? @tmhaudio Sorry, but I will not wade into the Linlai global vs ones you can buy elsewhere. Everyone has an opinion and I have mine........ | |
| Linlai KT88 experience? I now have about 50+ hours on the Linlai KT88-D. They are stable, no issues, and the sound is stunning. Again, these are drivers in the 300b amps running about 15 watts, and not used as output tubes. That said, they appear very well made and I ... | |
| 300b lovers The gear could easily be wired for 220-240 VAC 50Hz. Everything we use supports it except for ordering multiple primaries on the power transformers. Again, the project must get off the ground in the USA/Canada. If they are selling, and people f... | |
| 300b lovers I have a thorough dislike of working with lead-free solder. Nothing flows in a point to point build like a good 2% silver solder. Lately I have been using Wonder Solder for the past year or two and it is just wonderful to work with. Of course, ... | |
| Linlai KT88 experience? @tmhaudio I heard some Sophia blue glass when I was doing the vintage work and a fellow sent me a quad to use with his citation II amp that I was restoring. Sounded good, but I only listened for an evening and the amp had all new caps and power... | |
| Linlai KT88 experience? OK 25-30 hours. As expected with any good KT88, they have really opened up. The other KT88 I have run as drivers in this amp is the now unobtanium Shuguang WEKT88, which was their best KT88 right before the factory shut down. The Shuguang WE se... | |
| 300b lovers @pindac Would it require a 240 VAC version or have most of the ones you have heard been US market 120VAC ones that someone was using a step up transformer with on your side of the pond? I will say that I have the pair of prototype amps that will... | |
| 300b lovers @pindac that will be up to Spatial Audio Lab. I am going there in late Nov to teach them the builds of amps and matching preamp. There will be a review pair made that will spend some time in the USA next year. After that we shall see. It is n... | |
| Linlai KT88 experience? OK, the Linlai KT88-D arrived. They are very well made, and all plate structures are very straight in the bottle on this quad. Very solid in the hand. I am running them as drivers in the 300b mono amps that Lynn Olson and I designed. The tube... | |
| 300b lovers The octal boards for ST70 are direct fit and do not stress the power supply. You can use the diode replacement for rectifiers, but it sounds different. Basically, the amp is not bad, and a great deal for the money when restored and updated. A d... | |
| 300b lovers Actually, the Kootenay, and the the Valhalla amps use a similar circuit for input and drivers (with judicious use of a CCS), and the power supplies are the basis for what we used in the Blackbird 300b amps. We improved the power supply design for... | |
| Linlai KT88 experience? Not yet. Expecting delivery tomorrow or Weds. Then they need 50 hours. I will report, promise. | |
| 300b lovers @alexberger Fine is a relative term. If you improve the power supply in a citation II the amp is greatly improved. That is why the KT88 amps I used to build have FAR better power supplies than vintage amps. If you build a vintage amp with the s... | |
| 300b lovers Actually I have rebuilt 3 or 4 of the ST70 amps. The best version is to skip the 7199 or 6GH8 types and to one install of the octal driver replacement boards. I really liked the 3 6sn7 tube version that tubes4hifi used to sell and perhaps still... | |
| 300b lovers Well... Lynn has lots of wild ideas, but the thing is that they are very well thought out, and they are based on years of technical experience with Tektronix. I learned many years ago in academia, and as part of my main career in forest ecology r... |