Oops, I thought this was a cap rolling thread for the TU-8500. Apologies. Mods please delete if my comments may cause confusion. Victor is 100% correct: E180CC is good to the TU-8500, not good for the TU-8200. Thanks Victor.
I see that people are using 5814A instead of 12AU7 with success. Before doing the same I wanted to ask for confirmation: It seems that the maximum heater-to-cathode voltage is 200V for the 12AU7 but "just" 100V for the 5814A. Is that an issue with the 8200R?
6P3S anyone
Was wondering if its ok to try the 6P3S on the TU-8200 ?
Will the 6P3S-e work better ?
Was wondering if its ok to try the 6P3S on the TU-8200 ?
Will the 6P3S-e work better ?
Hi, my messing around with tubes has turned the mosfets noisy. I have to replace them.
These are available from a reputed source, would they work? Please help.
FQPF11N50CF or FDPF5N60NZ
These are available from a reputed source, would they work? Please help.
FQPF11N50CF or FDPF5N60NZ
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Thanks Victor. Getting those parts in from Japan attracts customs and it becomes $$
That's why I was wondering if those other mosfets would be a replacement.
That's why I was wondering if those other mosfets would be a replacement.
Guys, please be careful with 6P3S. I tried them before Ferenc's advise and it messed up the amp.
While they worked for about 4 hours, it sounded great though. The amp got really noisy after that.
While they worked for about 4 hours, it sounded great though. The amp got really noisy after that.
Yep. Here's info I had received from Tamura-san as for 6p3s and 6p3s-e.
Dear Mr.Somogyi,
Thank you for your e-mail.
Yes, it is about the anode dissipation.
Actually it has to be 25 watts.
KT66 is OK because it is 25 watts, that is the least line,
20 watts is a bit too small.
It might be OK to use it for a while, but the tube life will be shortened for sure,
and some other trouble could occur, so we cannot recommend it.
Best regards,
Emi Tamura
EK JAPAN CO.,LTD
2020年9月24日(木) 0:44
Dear Tamura-san,
Thank you very much.
I was wondering if anode dissipation is any issue? 20 watts for 6P3S as far as I recall (may be design center value). I think KT-66 has 25 watts value.
Dear Mr.Somogyi,
Thank you for your e-mail.
Yes, it is about the anode dissipation.
Actually it has to be 25 watts.
KT66 is OK because it is 25 watts, that is the least line,
20 watts is a bit too small.
It might be OK to use it for a while, but the tube life will be shortened for sure,
and some other trouble could occur, so we cannot recommend it.
Best regards,
Emi Tamura
EK JAPAN CO.,LTD
2020年9月24日(木) 0:44
Dear Tamura-san,
Thank you very much.
I was wondering if anode dissipation is any issue? 20 watts for 6P3S as far as I recall (may be design center value). I think KT-66 has 25 watts value.
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Does anyone has experience with Mullard KT88, or other KT88, being driven by the 8200? Likes/ dislikes? Considering everything that is going on, wondering if it would be worthwhile to stock up on a few?
I ran a KT88 for a short period. It was nice. I was borrowing them so I had to give them back. I only had a day with them. I have a pair of RCA (made by tung-sol) 6550's that are sublime. The KT88 that I tried was a bit more aggressive. The 6550 was more pretty sounding but still had grunt.
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