This amp is manually biased, which I keep a religious eye on. I have manually biased my previous Cary V-12R amp a few times over 10 years, after new tubes. The bias procedure for the output tubes seems pretty straight forward on the ARC VT-130SE given its meters up front. I believe I can handle the task. I will probably get a tech to bias the six other input/driver tubes, as there is no on-board meter for those. What I am wondering is what are the best spots for the new tubes I have? - either a matched quartet on each side, or a positional combination to achieve an "average" on each side? Thanks again.
How best to place tubes in an ARC VT-130SE
I have two matched quartets of 6550EH Platinums that I am going to put in my amp. One quartet's tubes measure lp: 39 and GM of 5,700, 45 ma. Every tube in the other quartet measures lp: 36, GM of 5,400, 44 ma. There are tube positions of V4-V7 on left and V14-V17 on the right. The quartets are perfectly matched. I want to achieve a "match" between the sides. Anyone with any experience as to where I should place these to have both sides "balanced" with each other? I understand it is identical to the VT-130 as well. Thanks.
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- 10 posts total
Then please explain to the OP where you would install the new tubes, he has, for the best output balance across each channel. Here is the schematic wiring diagram. Here is the owners manual. Jim |
- 10 posts total