Re: [time-nuts] External cooling fans - source

On 18 December 2017 at 23:11, Charles Steinmetz wrote: > From time to time, the subject of external cooling fans comes up -- for > example, in discussions of the HP 5370A/B with their steaming hot > heatsinks. I have several times recommended very quiet, all-metal, 4"

[time-nuts] Recently acquired 53132A

I have worked out a design for using an LCD display in the 531xx counters. Basically it's a replacement front panel board with a micro and graphical LCD. I'm probably not going to build it until my VFD goes bad... maybe by then OLED displays will have their lifetime flaws worked out...

Re: [time-nuts] Recently acquired 53132A

Rick, The 53132A is a "12 digit/s" counter. Unless the frequency is really close to 10 MHz. Then it becomes a 11 digit/s counter. This is because it uses oversampling (IIRC, 200k samples/s) and it relies to some extent on statistics for its 12 digit resolution. This technique does not do as

Re: [time-nuts] Recently acquired 53132A

I worked in the HP Santa Clara Division frequency counter section at the time of the development of the 53132A series, which had the internal code name of "Major League Baseball". IIRC, the external reference circuit in it was designed by a couple of engineers who had no background in time

[time-nuts] Fwd: Cannot Command RFTGm-II-Rb / RFTGm-II-XO

@Mark - I would certainly take the latest version of Lady Heather to compile. I have already compiled and am using the Dec 2016 / v5 version of LH now, and while it receives data it does not recognize either Rb or XO devices. I did pull down RFTG.EXE, et. al., off the ko4bb.com web site.

Re: [time-nuts] Recently acquired 53132A

Hi If it is in working condition and stays in working condition, anything under $300 is a very good deal. Bob > On Dec 18, 2017, at 2:54 PM, Pete Lancashire wrote: > > Tom, > > I should have re-read the model number, no wonder I could not find anything. >

Re: [time-nuts] Recently acquired 53132A

Bob, I took the cover off, looks like the moisture inside the box was not that bad, can't see anything with corrosion, rust, oxides etc. And my first test sticking my head in the box and sniffing for the usual mold/mildew smells. On that VFD .. I totally agree my a 3324A and a 8664A are pretty

Re: [time-nuts] Recently acquired 53132A

Tom, I should have re-read the model number, no wonder I could not find anything. Hopefully still a good $100 investment. On Mon, Dec 18, 2017 at 11:43 AM, Bob kb8tq wrote: > Hi > > The 53132 is the older version of the 53230 counter. It’s been out of > production > and past

Re: [time-nuts] Recently acquired 53132A

Hi The 53132 is the older version of the 53230 counter. It’s been out of production and past "end of life" support for quite a while now. It’s main issue measurement wise is a group of issues that make it less sensitive (lower resolution) than one might think right at 10 MHz and to a lesser

Re: [time-nuts] Recently acquired 53132A

Pete, I don't recall that anyone complained much about the old 53132A, the counter that you have. The discussions we had about external reference a while ago were about new 53230A. There's nothing wrong with it, I mean, it's a very nice counter, but since it's a fancy, new design, high-end,

[time-nuts] Recently acquired 53132A

Friday I acquired a 53132A https://photos.app.goo.gl/xexnJcEmT8tEWXi73 It does not have any options. It is from a place that sells "selected" E-waste. I was in a water damaged box, and was from a DHL freight insurance sale. It's been in the box until a couple weeks ago. Anyway, until now I've

Re: [time-nuts] ergodicity vs 1/f

In message , Magnus D anielson writes: Years ago I ran into this paper: https://fas.org/irp/agency/dod/jason/statistics.pdf What is amazing about it, is that back in 1992 they nailed the odds of climate change to north