[time-nuts] Re: Death of a Capacitor

Hi, For spikes and RF, common ground is a chimera, a bed-time story for kids. The quicker you learn to understand that "ground wire" or "ground connection" is just another wire that has resistance, induction, various offsets and different noise, the "common" part is very much a "Your Mileage

[time-nuts] Re: Death of a Capacitor

Hi Once you put big inductors in the ground path …. it’s not a common ground anymore. Bob > On Sep 26, 2021, at 6:53 PM, Gerhard Hoffmann > wrote: > > > Am 27.09.21 um 00:34 schrieb Bob kb8tq: >> Hi >> >> If you start dumping major current spikes into a common ground, it’s >> amazingly

[time-nuts] Re: Death of a Capacitor

Am 27.09.21 um 00:34 schrieb Bob kb8tq: Hi If you start dumping major current spikes into a common ground, it’s amazingly difficult to get rid of the results. First Principles know the law of the conservation of spikes: Capacitors convert voltage spikes to current spikes. Inductors

[time-nuts] Re: Death of a Capacitor

Hi If you start dumping major current spikes into a common ground, it’s amazingly difficult to get rid of the results. Bob > On Sep 26, 2021, at 6:21 PM, John Ackermann N8UR wrote: > > I got some interesting and unintended data today. I was measuring low phase > noise oscillators using a

[time-nuts] Re: OCXO Datasheet search

Jim, That oscillator was a component in the old AN/USM-247V Versatile Avionics Shop Test (VAST) automatic test system for Naval avionics systems. Many years ago, I was a civil servant at the Naval Aviation Depot in Jacksonville, FL. While there, I was one of a team of technicians that

[time-nuts] Re: Failed HP 58503A VFD Segments

Hello, Since the display is quite similar to the 34401A one (and some other units of that era), it probably will use the same driver IC, SN75518 Regards, Javier On 26/9/21 21:03, ed breya wrote: There should a number of types. I looked in the manual for my Gigatronics 7200, which has VFDs

[time-nuts] Re: Failed HP 58503A VFD Segments

There should a number of types. I looked in the manual for my Gigatronics 7200, which has VFDs and is probably from the same era, and found they used NE594s. Ed ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email

[time-nuts] Re: OCXO Datasheet search

Hi Ok, there are a bunch of typos there ... > On Sep 25, 2021, at 10:59 PM, Jim Flanagan wrote: > > Hi - > I posted a request a number of years ago and wanted to make another attempt > to track down some specification data on a NOS 10 MHz OCXO that I have in my > possession. It had a NSN #

[time-nuts] OCXO Datasheet search

Hi - I posted a request a number of years ago and wanted to make another attempt to track down some specification data on a NOS 10 MHz OCXO that I have in my possession.  It had a NSN # of _5955-00-165-1665_ and was produced by several mfrs back in the mid to late '70's : 1630-2R        

[time-nuts] Re: 10 mhz distribution

I use an analog video distribution amplifier   it has one input and 8 outputs.  I got it at a ham radio swap meet for $5.00 and it works great.  It has BNC input and outputs and a built-in power supply. Sent from my Verizon, Samsung Galaxy smartphone by Morse code. Original message