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  1. It's been some years, I see. I'm interested in...

    It's been some years, I see. I'm interested in satisfactory application of 5964's...

    I just bought some cheap by odd NOS tubes, 8 x 5964 medium-mu 7-pin twin triodes (common cathode), intended for...
  2. Odd that 'G' was used for Perveance...G is...

    Odd that 'G' was used for Perveance...G is conventionally conductance, inverse of Resistance; G=1/R.

    Lower case g probably tends to indicate ac, and gm indicates the 'older' term 'mutual...
  3. I get tired of reading posts about "fake parts"....

    I get tired of reading posts about "fake parts". It's become such a commonplace topic it seems no one trusts anything...but they don't use the word 'counterfeit'...

    In my search today to identify...
  4. IF one has the ability to measure inductance,...

    IF one has the ability to measure inductance, something I check as 'one more thing' as a troubleshooting observation, is to measure each winding inductance (low ac voltage test instrument), and short...
  5. perveance Definition and Meaning...

    perveance Definition and Meaning adds remark that this parameter changes with tube aging. (Still nothing of practical importance, yet).


    Morgan Jones' "Valve Amplifiers" book says practical...
  6. Sorry, that's my weird sense of humor...of course...

    Sorry, that's my weird sense of humor...of course I spent more on a bag, but I have a lot and can do other things with them :O)

    They were Panasonic/Matsushita. Once I got them, I looked up their...
  7. Perhaps a little late, but here's my Gibson BR-9...

    Perhaps a little late, but here's my Gibson BR-9 project thus far. I think there is some useful info, if you can stay awake...oddly, I got no answers or interest on the Gibson web forum...oh well......
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    It's definitely open. I looked at the magnet...

    It's definitely open. I looked at the magnet wire-hookup wire joint that is at the outside of the winding under a microscope and also have electrical continuity between the outside black wire and the...
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    mid-50's P90 rewind

    Hi:

    I have an open mid-50's black bakelite cover dog-ear P90...open as in open continuity.

    I have already taken the magnets off (they were not bonded with any adhesive), and the coil is not...
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    Thank you for the lead...it sounds like it will...

    Thank you for the lead...it sounds like it will be interesting for some other project ideas as well.

    The thing about the particular machine I have, is that the winders sold my the company...
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    commecial winding gear tech question

    Hi:

    Not necessarily a pickup winding focal point, maybe more appropriate to transformers, but I'm wondering if anyone is familiar with any conventions for the sensing and wiring needed to...
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