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Type: Posts; User: jim rozen

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  1. Nominated for "understement of the entire thread."

    Nominated for "understement of the entire thread."
  2. Ain't that the truth. I rely exclusively on high...

    Ain't that the truth. I rely exclusively on high fidelity hollow state hardware.
    None of that distorting transistor stuff for me!

    http://www.mwdropbox.com/dropbox/jrr_transitone_2.JPG
  3. "not far way, the antenna farm KDKA used...." ...

    "not far way, the antenna farm KDKA used...."

    Yeah. I can play WLNA at loudspeaker volume on a crystal set. Not 50KW but it's real nearby.
    This is the acid test for vintage radios, can it...
  4. I suspect that if the manufacturer wanted an...

    I suspect that if the manufacturer wanted an extra resistor on top of the pot, they would have called that out in the diagram.
  5. This is a rise-and-fall machine.

    This is a rise-and-fall machine.
  6. Those pratt whitney oilers should have a spring...

    Those pratt whitney oilers should have a spring under the cap so you can lift the cap up without undoing the screw.
    There should be a bit of wick, which is basically a bit of pipe cleaner, that...
  7. Buy a good quality 2K ohm pot (allen bradley is...

    Buy a good quality 2K ohm pot (allen bradley is nice) and hook it up per the manual's diagram.
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    I do run a 9" buck adjust-true six jaw chuck on...

    I do run a 9" buck adjust-true six jaw chuck on my 10L. Big but it works fine.
    You can do small stuff in a big chuck but you can't do large stuff in a small chuck.
  9. A lot of modern scopes can spit out a jpg which...

    A lot of modern scopes can spit out a jpg which makes for a very readable picture. Example, my rotary converter output via the usb port on an
    HP scope; (I think the purple was utility phase)
    ...
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    Roll yer own! ...

    Roll yer own!

    http://www.mwdropbox.com/dropbox/_2004_retired_files/OILER.JPG
  11. There is some windage and bearing losses. In...

    There is some windage and bearing losses. In my case an unloaded 5 hp converter draws about 200 watts of real power. Folks with amp-clamp
    meters as their sole current measurement device tend...
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    Very early hardinge machines has a proprietary...

    Very early hardinge machines has a proprietary tailstock taper that was similar in size to MT-1. But it is not. If it is not
    then do not just stuff a morse taper reamer in there, it would need...
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    As an aside,putting a zerk fitting on your front...

    As an aside,putting a zerk fitting on your front bearing would be a bad idea. The BB headstock I rebuilt had this done to it, and the grease does not really get properly into the balls
    when this is...
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    In our case an owner had welded up the bottom...

    In our case an owner had welded up the bottom flange because the holes had been buggered. We had to machine
    out new holes where the welds were very hard. This is an original jug:
  15. The holes in the head are now oversize. If...

    The holes in the head are now oversize. If guides are manufactured according to the original specs or
    dimensions, they will be undersized. This is now an engineering job and charge accordingly...
  16. "Some thought that "formal". But it wasn't,...

    "Some thought that "formal". But it wasn't, really."

    The government formally licenced and regulated amature radio before the FCC existed.
    RTFB,

    As far as replacing a phase perfect unit...
  17. [QUOTE=thermite;3456367]I picked the year for a...

    [QUOTE=thermite;3456367]I picked the year for a reason. One of my "two letter call sign" mentors was in the game well before the FCC existed and Amateur radio was formalized.

    Amateur radio was...
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    We did a favor and cleaned up the mounting...

    We did a favor and cleaned up the mounting flanges on an old HD jug, similar to the ones shown in the photo, fixured for boring. The castings were
    simply amazing. I have no idea how they managed...
  19. "This ain't invent-the-wheel 1937 ham radio." ...

    "This ain't invent-the-wheel 1937 ham radio."

    Not for nothing, but an amateur radio operator from 1937 would be one of the best
    people to analyze and solve an interference issue like this.
  20. Eliminating RFI from a unit like this, with or...

    Eliminating RFI from a unit like this, with or without any help from PP (good luck with that, this would impact their bottom line) is tougher than it looks. This is one of the things I've
    done in...
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    "No oil cup indicates a greased bearing and the...

    "No oil cup indicates a greased bearing and the oil cup would want some spindle oil."

    This is a ball bearing headstock - it has a pair of angular contact ball bearings in the front, and a single...
  22. Fabrication job, or an engineering job? If the...

    Fabrication job, or an engineering job? If the first then have the customer provide a dimensioned print, and manufacture
    to that print. If it goes sideways then its on him.

    If an...
  23. "one of technology's faster-moving fields,...

    "one of technology's faster-moving fields, electronics are..."

    Yoda you thank. But don't dice with me about vintage electronics. I can still buy replacement parts, and get
    full schematics for...
  24. You miss the point. This is a 'feature', not a...

    You miss the point. This is a 'feature', not a bug. The feature is called non-backwards compatibility. This makes the company a lot of
    money because

    a) no need to provide service or...
  25. Aluminum tarnishes almost instantly. By...

    Aluminum tarnishes almost instantly. By tarnish I mean, oxidize. Fresh aluminum surfaces form a thin (about 5 angstroms) layer of aluminum oxide. The
    layer is tough, gas tight, and will...
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