I want to get a set to try but want opinions on the 1-3 or 4-7 rating. Once convincing myself they were indeed durable, I though it would be better to enjoy the amp rather than destroy it trying to destroy the tubes. I think our testing is better and we actually listen to the tubes we sell. If youve been buying Groove Tubes or Valve Art KT66 tubes, save your money and buy these instead. Ive got twenty year old Valve Art tubes in my home hi-fi amps. These tubes look like the Valve Art Shuguang KT66 still sold (for much more ) by many tube dealers worldwide. Regardless, its beside the point and bias probes are fine when theyre working properly.KT stands for kinkless tetrode, developed by the British Marconi-Osram company in the 30s to address the non-linearity of most 6L6 family tubes. You still have to go inside the amp to measure the B, so you know the dissipation. The voltage shown is the cathode current of the tube (eg. It really will point out if tubes arent matched as well as they should be too.Ĭonnect your meter (set to DCV, 200mV scale), and power up the amp. Yes, there is a way to modify that socket to allow a meters probe to access the plate voltage.if one is good with a drill and understands how the socket works. IF the tool does not allow one to read the plate voltage, then one needs to be able to read that.in circuit or with a mod to the tool through that tool. If the tool can read current draw and plate voltage, then all one needs to know is the tubes max plate dissipation and the equation to solve for plate dissipation. Thanks in advance and yes, Im aware of the inherent danger of poking around in a tube amp. I was wondering if anyone had a manual theyd be willing to scan in and send to me (particularly the little chart in the back w relevant ranges based on plate voltage) or if anyone knows where I can get the info Called Groove Tubes and they were zero help. The manual that came with the tool was damaged in Harvey (recent hurricane, you may have heard of it).
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