Sorry if this is not the right Forum for this question but I am not seeing anything specifically for tubes. When matching triodes in a power tube (6AS7 for insistence), what is the variance between the triode 1 & 2 that distinguishes Pass/Fail. Is this a fixed number or percentage of minimum...

I figured it out. Thank you

While testing some tubes today I ran into a problem testing a couple 7236 tubes (Cetron, Sylvania). I had the tester set for 6AS7 thinking this was the class of the 7236. Both tubes read out at 200-300 on the GM meter, unlike the 5000-5800 for other tubes marked 6AS7G (Min 1800). Not wanting to...

Thanks for that. Woo Audio did get right back to me confirming it is a WA3. Funny they did it with a photo of the amp and not the SN. One would think that the model and year would be coded into the SN. That said this was a very early unit and could be pre-coding.

Thanks for that. I've also sent an email to Woo Audio for their identification based on the serial number.

Does anyone know if the Model & Date Code is incorporated into the Woo serial number (SN. 04111015). I purchased this headphone amp very early on 2004-6 when Woo Audio was offering them on eBay. Frankly, I've lost track of the date and model number of the unit and was hoping to be able to...

Has anyone been able to find an overseas supplier of highly end RCA plugs similar to those manufactured by WBT etc.? I am interested in buying quantity directly from the manufacture or wholesaler in order to get my cost down on large quantities. I have located plenty of Chinese manufactures but...

Quote: Originally Posted by Len A pentode can be wired for triode or tetrode operation (by "defeating" some of the grids), so sometimes you find amps that allow you to switch between "ultralinear" and triode operation. Interesting, to clarify when you say "defeating" some of the...

Quote: Originally Posted by antonik You always can do a search before asking very basic questions on the forum . Alex, I appreciate your response and clarification it is helpful. Regarding your search first comment, I invite you to search both "Parallel-Single-Ended, Triode...

Can anyone explain what the term “triode” means?

40W Parallel-Single-Ended, Triode, Pure class"A" Amplifier Would someone please help clarify some of the terminology in this description? I am trying to sort out for myself the meaning of various terminologies to best help understand the principal of varying and circuitry ie single ended vs...

When building and mono block tube amplifier is there an advantage in using the point-to-point Teflon coated wire circuitry over a printed circuit boards. Do you lose quality of sound when using a printed circuit board over point-to-point wiring? I read a lot of discussion about Teflon coated...

Quote: Originally Posted by jamato8 Woo3: The supply for the 6080/6AS7 and the drive tubes the 6922, At the risk of exposing my ignorance regarding the subject matter I have to ask for some clarification. I am confused by your statement “The supply for the 6080/6AS7 and the...

Quote: Originally Posted by archosman Would there be any way my hum could be related to my headphones? Even I wouldn't believe that one but I'm curious. I never noticed a problem with my MG OTL and the Senn600/Cardas combo. Without going back and reading all the threads it seems...