[time-nuts] modification Lucent RFTG

paul swed paulswedb at gmail.com
Mon Dec 14 16:52:47 EST 2015


Jorg
Excellent improvement.Now I can easily see the cap that was removed and
whats left is the glue from manufacturing. It makes sense.
Regards
Paul
WB8TSL

On Sun, Dec 13, 2015 at 4:59 PM, Jörg Logemann <joerg.logemann at lai.de>
wrote:

> Rex,
> I made some modifications to my article and I hope, that everything is
> ok now. Please feel free to correct the text if you find some spelling
> mistakes (very likely) because my english is not perfect, hi.
> Thanks for your help,
> best 73s
> Joerg, DL2NI
>
>
> Am 13.12.2015 um 12:00 schrieb Rex:
> > Joerg,
> >
> > This looks like a very useful mod on a unit that many of us have. I'm
> > not aware of any schematics available for these, so I guess you have
> > reverse-engineered the "black"  part of the schematic that you
> > provided. -- Nice work!
> >
> > Having said that, may I offer some minor criticism (constructive and
> > positive, I hope) of your document?
> >
> > The schematic you provided shows the key transistors as Q1 and Q2. In
> > the text you refer to Q208 and Q209 (which I think are marked on the
> > board). From the description, I think Q1 = Q208 and Q2 = Q209. It
> > would be nice if the schematic had the Q-numbers changed, or at least,
> > you mentioned the equivalence in your text.
> >
> > (Trivial) Aren't you using an existing SMA connector for your output?
> > So, maybe it should be black in the schematic.
> >
> > Your picture of the board rework is pretty low resolution; even
> > zooming into it just gives bigger blurry image. You have added some
> > annotations but they are in red over the green board color. Combined
> > with the low resolution they are very hard to read. I'm pretty sure
> > they remain in German in the English version too.
> >
> > My suggestions:
> >     - Edit the schematic to change the Q-numbers to match the board
> > and text, or at least give the equivalence in the text.
> >     - Use a higher resolution picture and make the annotations more
> > readable with different color or background shading.
> >     - The picture you provide is "after". It would be nice to also
> > have "before". If you don't have a before picture, I or some other
> > member could probably take one.
> >     - Consider having picture annotations in English for the English
> > version.
> >
> > I think what you have done is great. I just think the sharing document
> > could be improved to make it easier for others to duplicate.
> >
> > If you like, I could possibly help make a more readable annotated
> > picture if you can provide me a higher res picture of the board. Just
> > an offer to help if you would consider my suggestions. I think you
> > will see my email in my post.
> >
> > -Rex   KK6MK
> >
> >
> >
> > On 12/12/2015 4:39 PM, Jörg Logemann wrote:
> >> Hi,
> >> I worked out a modification of the Lucent GPSDO to get 10MHz out of it
> >> which I offer to the community. The article is available in english and
> >> german (attached).
> >>
> >> best 73
> >> Joerg, DL2NI
> >>
> >>
> >
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>
> --
> Dipl.Ing.(FH) Jörg Logemann
> Veilchenstraße 3
> D-89150 Laichingen
> Germany
> Tel. +49 7333 922506
> Mobil  +49 171 2814359
> Fax. +49 7333 922507
> mail: joerg.logemann at t-online.de
>
>
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