Hi Some of the connectors you get from odd places have threads that aren't quite right. They are the right "polarity" they just aren't cut deep enough. I would not order a ton of parts until I saw a sample.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Don Latham Sent: Monday, February 28, 2011 1:15 PM To: [email protected]; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Partridge Divider Board I found right angle sma's with long threaded shanks that will mount to a panel for about $1.00 apiece on epray. These are made in the Old Country and are shipped from Hong Kong. I don't know if there are BNC's that will directly solder to the board. Don ----- Original Message ----- From: "Gordon Batey" <[email protected]> To: <[email protected]> Sent: Monday, February 28, 2011 7:01 AM Subject: Re: [time-nuts] Partridge Divider Board > Greetings to the TimeKeepers, > > I appreciate the comments on the Partridge Divider board. I am also > seeking > an enclosure and your comments have some interest for me. > > I would also be interested in any comments regarding a source of input and > output connectors for this project. The board is designed for SMA > vertical > connectors which I have found at about $10 each. Pretty steep for me. I > would prefer right angle, threaded BNC connectors similar to those used in > the TAPR distribution box but I have not found any of these that appear to > be suitable. Any suggestions are appreciated. > > 73 Gordon WA4FJC > [email protected] > > ==================================================================== > > > Date: Sun, 27 Feb 2011 20:35:33 EST > From: [email protected] > Subject: [time-nuts] Partridge Divider Board and 10 MHz Distribution > Amplifier Enclosure -- an Idea > To: [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="US-ASCII" > > While admiring my newly received divider board from David Partridge and > thinking about a suitable enclosure for its use on my bench, I happened to > look at an Extron ADA3 80 video distribution amplifier that I acquired > after > suggestions from KO4BB. These enclosures are mechanically sturdy and > quite > > empty on the inside. There is plenty of room to mount the divider board > if existing (unused) threaded standoffs are relocated to match the > divider > board mounting holes. As the distribution amplifier's circuit board and > connections are all on the back panel, the front panel is completely free > and > clear for mounting the division ratio switch and output connectors. > > The analog performance of the distribution amplifier seems very good; > however, the BNC output connectors are grounded to the case and there is > only > one active output device for each of the R, G, & B outputs. The three > output connectors provided for each are simply isolated through resistors, > thus > isolation is limited. Nevertheless, for a single bench setup like mine, > the distribution amplifier will probably serve adequately well to > distribute > 10 MHz from a T-bolt to the counters, divider board, and a signal > generator > > -- all on the same bench. As the R, G, & B DA inputs can be looped, the > ADA3 80 can provide up to nine 10 MHz outputs via BNC connectors. > > The ADA3 80 is powered from an external 9-volt, 500 ma wall wart. > According to KO4BB: _http://www.ko4bb.com/Timing/Distribution_Amp/_ > (http://www.ko4bb.com/Timing/Distribution_Amp/) , the DA has an onboard > switching > converter and + and -5 volt regulators to power the distribution > amplifiers. It > is possible there is sufficient +5 volt current capacity to power the > divider board too. I have not investigated this yet as I am not certain > about > the maximum current requirement for the divider board. Assuming it can > be > powered from the existing supply, one could wind up with a very nice and > compact bench frequency reference and distribution system. > > Extron rates the power consumption of the ADA3 80 at 2-watts. However, > it > appears Extron uses the same PC board and power unit for the ADA3 180 for > which the power consumption is 3-watts. > Thus there may be adequate capacity to safely power the divider board. > > If power supply noise is a problem, there is plenty of room in the case > for > additional filtering. > > Bruce Hunter, KG6OJI > > > _______________________________________________ > 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. _______________________________________________ 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.
