Joerg Yes this looks like a nice simple mod. Its difficult to tell from the pictures but in order to use the sma it looks like you cut the trace over by the cap. I ran into the same thing. The lead goes into the board and its end point is unclear. When I released a solution about 9 months ago I used a video op-amp. This gave gain and drive. But with more complexity. It is a bit of a challenge to slip the boards in and out. Thanks Paul WB8TSL
On Sun, Dec 13, 2015 at 6:00 AM, Rex <[email protected]> wrote: > 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 >> >> >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
