8/8/2023 0 Comments Tube amp doctor bias masterSomething of the sort happened when I would use my Eurotube Octal Bias probe (plus my DVM set to read current) on my innocent little Laney Cub 10 amp - it was difficult to get a stable reading, because even after the tubes were warm, the readout on my meter would move up and down across a fairly wide range, as if at random, for many minutes - not quite what I'd call oscillation, since to me "oscillation" means something insanely rapid this was merely a constantly changing value, but even so it was unsettling. This would be fine, except that probes which measure current directly in this fashion can weird readings, including oscillation. My first probe was their low-end model, the "Eurotubes Octal Bias Probe," and it operates by measuring current and evidently the Pro One does as well see this brag quote from the EuroTubes product page: This definitely includes the various probes marketed under the EuroTube brand. Some operate differently: they measure current directly, not voltage, and are proud of it. In fact, all bias probes do not put a 1 ohm resistor in the cathode path. And I am not alone in my mistrust here is Lord Valve, who will give the closing argument for the prosecution - his biasing FAQ can be found at Duncan's Amp Pages at : I did not find this a satisfactory response. I wrote EuroTubes and they denied that customers had ever reported oscillation problems, let alone the slower instability I'd experienced. So I bought & assembled a Bias Scout probe kit courtesy of TubeDepot the Scout does use the 1 ohm resistors, and it works far better - with my DMM set up to read voltage, I get a stable reading from the probe as soon as the tubes are warmed up. The probe would settle down after maybe 10 minutes, but I didn't trust it. Something of the sort happened when I would use my Eurotube Octal Bias probe (plus my DMM set to read current) on my innocent little Laney Cub 10 amp - it was difficult to get a stable reading, because even after the tubes were warm, the readout on my meter would move up and down across a fairly wide range, as if at random, for many minutes - not quite what I'd call oscillation, since to me "oscillation" means something insanely rapid this was merely a constantly changing value, but even so it was unsettling. Will not be used on third-party websites.This would be fine, except that probes which measure current directly in this fashion can weird readings, including oscillation. The data will not be passed on to third parties and Shop delivers advertising banners on our start and category pages that match When the personalisation function is activated, our online The Trade Desk stores the data anonymously. No personal data is transmitted to The Trade Desk in this process. You can find more details on this in our privacy policy. The information obtained through cookies allows us to compile ad performance statistics and serve retargeting ads on The Trade Desks advertising network. By using The Trade Desk tracking, both The Trade Desk and we are able to track which ads users interact with and which pages they are redirected to after clicking on an ad. No personal data is transmitted from our side to Facebook. The information obtained through cookies allows us to compile statistics on ad performance. Facebook Ads conversion tracking allows Facebook and us to track which ads users interact with and which pages they are redirected to after clicking on an ad. In this way, consumers give each other guidance and give us the opportunity to continuously improve. Customers can also leave a comment to report on their shopping experience. With the customer reviews of Trusted Shops it is possible to award stars for delivery, condition of the goods and customer service. This cookie stores user-like settings for the chat system provider, which are required for our online chat service. These discounts are usually communicated through newsletters, which are created and managed by us with the tool "Emarsys". Emarsysįor a more convenient implementation of discounts, we occasionally use cookies which guarantee the discount through a so-called affiliate program through the link of origin. Microsoft stores the information anonymously. No personally identifiable information is submitted to Microsoft. We may use the information collected through cookies to generate statistics about ad performance. Through Microsoft Ads Conversion Tracking, Microsoft and we can track which ads users interact with and which pages they are redirected to after clicking on an ad. The data is stored anonymously by Google. No personally identifiable information is submitted to Google. We may use the information collected through cookies to compile statistics about ad performance. Through Google Ads conversion tracking, Google and we are able to track which ads users interact with and which pages they are redirected to after clicking on an ad.
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