Well, quite. I merely asked them to confirm which pot was balance and which is bias, I'd already worked out the biasing information using standard protocol. I also read on here that I'd under-egged my figures as BS run their valves right on the limit so asked for confirmation on that. Plus been told by two seperate BS reps on different occasions that the HT5 was self-biasing, so a certain amount of clarity was needed from BS.thephantum wrote:Here's the secret: If you ask them for biasing information, they automatically know that you don't know what your doing.
The only proper way to set bias is to look up the plate dissipation rate of the tube type, then measure plate voltage, do the math and adjust bias current accordingly.
In the end I downloaded a circuit diagram and worked it all out anyway.
Biasing is not exactly rocket science, so don't know why they get so iffy about it. Christ, I just rebuilt the engine and uprated the brake system in my track car, which most certainly has the ability to kill me, and Lotus told me everything I needed to know, no patronising fluff like, "sorry sir we can't tell you how to torque this nut in case you drive your stupid self into a brick wall at 150mph". So I don't buy the 'if you ask questions you don't understand stuff' mentality, generally it's people who don't ask questions that never improve their understanding. The whole thing is merely a sign of a litigious world where people don't like to be accountable.