[time-nuts] Low noise regenerative 10 to 5 MHz divider

2013-04-12 Thread Luciano Paramithiotti
See also the paper describe my regenerative divider: http://www.timeok.it/files/low_noise_regenerative_divider.pdf Luciano Timeok www.timeok.it ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Connectors

2013-04-12 Thread Bob Camp
Hi The fancy F connectors are indeed waterproof if: 1) You have the right cable 2) The cable and connector match up 3) The tool and the connector match up The auction sites are a great place to get samples of connectors and tools that apparently work with no known cable … If you are not

Re: [time-nuts] Connectors

2013-04-12 Thread Azelio Boriani
Sorry, not neoprene but self-sealing polyisobutyl tape, very effective for the outdoor antenna work**. I have recently opened a sealed connection, after 10 years, and the protected connector appears as new. On Fri, Apr 12, 2013 at 2:38 PM, Azelio Boriani azelio.bori...@screen.itwrote: I use

Re: [time-nuts] Low-pass Filter for 5 and 10 MHz

2013-04-12 Thread Volker Esper
...but what about the phase jitter of the filter itself? While absolute phase shift may not (or may?) be an issue I guess that passive filters do have a phase jitter, too, due to mechanical vibration, tempco, and what else. Particularly at frequencies where the filter response has sharp

Re: [time-nuts] Connectors

2013-04-12 Thread Rob Kimberley
It's a very useful material, also called Self Amalgamating Tape. Been using it for years for all sorts of outside cable work. Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: 12 April 2013 14:00 To: Discussion

Re: [time-nuts] Connectors

2013-04-12 Thread Volker Esper
Yes, I use those compression types, too, for example http://www.reichelt.de/F-Anschluss/IK-FKPS-49/3/index.html?;ACTION=3;LA=446;ARTICLE=87371;GROUPID=3538;artnr=IK+FKPS+49 Of course, everything has to match, the cable, the connector, the pliers. Be careful with the inner conductor. It's good

Re: [time-nuts] Low-pass Filter for 5 and 10 MHz

2013-04-12 Thread Richard (Rick) Karlquist
On 4/12/2013 7:58 AM, Volker Esper wrote: ...but what about the phase jitter of the filter itself? While absolute phase shift may not (or may?) be an issue I guess that passive filters do have a phase jitter, too, due to mechanical vibration, tempco, and what else. Particularly at

Re: [time-nuts] Low-pass Filter for 5 and 10 MHz

2013-04-12 Thread Bob Camp
Hi A simple way to look at filter stability is to first look at group delay at 10 MHz (or what ever your signal frequency is). The higher the group delay, the more likely you are to get into the sort of trouble you thinking about. Low Q / wide band filters are your friend in this case. Band pass

Re: [time-nuts] Connectors

2013-04-12 Thread brent evers
BTW - 3M Scotch rubber tape is regularly used in the offshore industry to make waterproof connections to 6000m/10,000psi. I use it on any/all outdoor signal (RF/Microwve antenna connectors, amphenol, etc) connectors as well. I cover the rubber tape with a layer of electrical tape (Super 88), and

Re: [time-nuts] Low-pass Filter for 5 and 10 MHz

2013-04-12 Thread Volker Esper
Am 12.04.2013 18:24, schrieb Bob Camp: A simple way to look at filter stability is to first look at group delay at 10 MHz... That's what I meant (d phi / d f), I just wrote it in a roundabout way... The higher the group delay, the more likely you are to get into the sort of trouble you

Re: [time-nuts] Connectors

2013-04-12 Thread Rick Karlquist
brent evers wrote: BTW - 3M Scotch rubber tape is regularly used in the offshore industry to make waterproof connections to 6000m/10,000psi. I use it on any/all outdoor signal (RF/Microwve antenna connectors, amphenol, etc) connectors as well. I cover the rubber tape with a layer of

Re: [time-nuts] Connectors

2013-04-12 Thread Brooke Clarke
Hi: Water has a dielectric constant around 60 compared to plastic that just over 2. So if water gets into the connection there's going to be problems. It turns out that Silicon grease has a dielectric constant very close to plastic so filling an open RF connector with Silicon grease prior to

Re: [time-nuts] Connectors

2013-04-12 Thread Mike S
On 4/12/2013 1:58 PM, Rick Karlquist wrote: What are you referring to as scotchguard? I thought that was a discontinued waterproofing spray for fabric. You must be talking about something else. He may have meant Scotchkote, as in Scotchkote Electrical Coating FD. BTW, Scotchgard is used for

[time-nuts] UPDATE: DATUM 9390-52054 Grief again...

2013-04-12 Thread Burt I. Weiner
Sorry for the delay in posting this update. Things have been hectic, and then there was NAB. Here's what I've discovered: The receiver started working after about 6 hours of just sitting. However, the 9390's internal Vectron oscillator was quite a ways off frequency and did not want to

Re: [time-nuts] Brooks Shera ASM release

2013-04-12 Thread paul swed
Bert Thank you for working to share Brooks code with the time-nuts. Regards Paul. On Fri, Apr 12, 2013 at 2:28 PM, ewkeh...@aol.com wrote: Attached is Brooks Shera’s final source code and hex file. As a reminder in all of his released code Brooks requested that any use of his code be

Re: [time-nuts] Connectors

2013-04-12 Thread paul swed
Ohhh man. Yes wrong product ScotchKote. Regards Paul On Fri, Apr 12, 2013 at 2:48 PM, Mike S mi...@flatsurface.com wrote: On 4/12/2013 1:58 PM, Rick Karlquist wrote: What are you referring to as scotchguard? I thought that was a discontinued waterproofing spray for fabric. You must be

Re: [time-nuts] Connectors

2013-04-12 Thread paul swed
OK this is crazy I answered out of sequence not realizing my email had never been sent. Describing Navy and ScotchKote... Regards Paul WB8TSL On Fri, Apr 12, 2013 at 3:36 PM, paul swed paulsw...@gmail.com wrote: Brent You must be ex-Navy. We did the same thing with a final coat of liquid

[time-nuts] Brooks Shera ASM release

2013-04-12 Thread EWKehren
The time-nuts server takes out all spaces so allow me to resend the acknowledgementsBert Kehren At this time I like to thank Brooks for all the work he did, his wife

Re: [time-nuts] Brooks Shera ASM release

2013-04-12 Thread Arnold Tibus
Gentlemen, this is a very good note, many thanks for this very interesting information and the work behind! I will try to implement the new code and a new processor without mistakes from my side. Regards, Arnold, DK2WT Am 12.04.2013 20:28, schrieb ewkeh...@aol.com: Attached is Brooks

Re: [time-nuts] Connectors

2013-04-12 Thread paul swed
Actually though I spelled it wrong I did have the right product. Regards Paul WB8TSL On Fri, Apr 12, 2013 at 3:31 PM, paul swed paulsw...@gmail.com wrote: Ohhh man. Yes wrong product ScotchKote. Regards Paul On Fri, Apr 12, 2013 at 2:48 PM, Mike S mi...@flatsurface.com wrote: On

Re: [time-nuts] Connectors

2013-04-12 Thread Azelio Boriani
I use neoprene tape to make really water tight connections for all type of connectors. On Fri, Apr 12, 2013 at 1:27 PM, Bob Camp li...@rtty.us wrote: Hi The fancy F connectors are indeed waterproof if: 1) You have the right cable 2) The cable and connector match up 3) The tool and the

Re: [time-nuts] Brooks Shera ASM release

2013-04-12 Thread Alan Melia
Bert is there any way we can add our names to some expression of thanks to his widow Karen and her helpers for their work and maybe leave a remembrance of his worldwide friends for his family? Thanks for your efforts Best wishes Alan Melia (G3NYK) UK - Original Message - From:

Re: [time-nuts] Connectors

2013-04-12 Thread paul swed
Brent You must be ex-Navy. We did the same thing with a final coat of liquid rubber. 3M scotch coat. On the ships I could open a connector that had been to sea for years and the connectors were clean as they were when installed. I still use this approach. Very solid and as I mentioned earlier in