[time-nuts] Re: Noise down-converter project

Do you need a 4647? Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N  78.9823741 W (GPSDO) Telephones: Home:     +1-304-289-6057 US cell  

[time-nuts] Re: looking for MITREX modem manual/documentation

Good luck; This was one of the first projects I worked on when I joined Comsat Labs. Les Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N  78.9823741 W (GPSDO)

[time-nuts] Re: Frequency Standard - Where Can I Get One.

That reminds me; Used to have a TWTT link via satellite watching a Caesium at an English Gov site. Was puzzled to watch the relative freq cycle day and night until we learned the UKGOV site room at nit and day different temperature control settings. 1 UK Cs vs. our 3 Cs and ulta pure flywheel.

[time-nuts] Re: NTP servers

Yupp Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y (Reformed USNSG CTM1) les...@veenstras.com 452 Stable Ln Keyser WV 26726 USA GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N  78.9823741 W (GPSDO) Telephones: Home:+1-304-289-6057 US cell  +1-304-790-9192 Jamaica

[time-nuts] FW: [usncva] United States Naval Cryptologic Veterans Association - Digest #169

Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N 78.982287 W (Google) GPS: 39.33682 N 78.9823741 W (GPSDO) Telephones: Home:

[time-nuts] Re: Test

Still here Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N  78.9823741 W (GPSDO) Telephones: Home:     +1-304-289-6057 US cell   

[time-nuts] Re: The Collapse of Puerto Rico’s Iconic Telescope [April 5th, 2021 New Yorker]

RX up here at Green Bank Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 -Original Message- From: Wes [mailto:w...@triconet.org] Sent: Wednesday, March 31, 2021 2:34 PM To: time-nuts@lists.febo.com Subject:

Re: [time-nuts] EOL Motorola Oncore Remote Antenna

This brings up a point I have made frequently, in my professional life. Do not try to seal in electronics (for me , satellite units mounted near or on the feed system) instead warm the area with electronics and place a weep hole at the low point. Short of true hermetic seals, any other gasketed

Re: [time-nuts] Aging 5065A ?

This I suspect is not original, but with respect for the need for 48 bit resolution, why not, say, a 24 bit, with reduced range such that it's steps are the same as what you would see with 48 bits, this stacked (Biased) on a fixed stable voltage in middle of expected control range. Fixed voltage

Re: [time-nuts] Some FTS1000 questions

Boards? Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N  78.9823741 W (GPSDO) Telephones: Home:     +1-304-289-6057 US cell   

Re: [time-nuts] HP-10811AB-OCXO interface questions

Ordered a bunch of these to test against the TAPR device https://www.aliexpress.com/item/4001231758949.html?spm=a2g0s.9042311.0.0.151 84c4d1hMhZs TLV3501 Single Chan High Speed Comparator Frequency Meter Front Shaping Module DC 2.7-5V Frequency Counter SMA Specifications: Supply voltage: 2.7-5VDC

Re: [time-nuts] WWVB SDR discussion

That’s a unavailable EBAY listing number What is the actual La Crosse model or part number for the new software 14" clocks Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N 

Re: [time-nuts] another source of time...

Just listen on HfF or example about 17m (18MHz) , with a wide band digital receiver with a waterfall display. If the band is open at all, you will see them sweeping up every few minutes. Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser

Re: [time-nuts] HP-5372A operation with no battery

Magnus: Thanks. I now have a full set of 5771 and 5372 manuals. With lots of app notes and other addenda. If anyone needs a set on a DVD, be happy to make one for them. les Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail)

[time-nuts] HP-5372A operation with no battery

Hi Magnus: You are, of course right; For a ham, the video board repair was trivial. I now have three working boards, one reinstalled in my HP-5372A. So, of course, now I have the out of cal message, traceable to the RAM battery failure. I know this has been discussed a number of times

Re: [time-nuts] WWVB PM Time Questions

Software Costas, see MatLab: https://www.mathworks.com/matlabcentral/fileexchange/16744-demodulating-a-bp sk-using-costas-loop?s_tid=FX_rc2_behav Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W

Re: [time-nuts] WWVB PM Time Questions

Ray: If you will pardon the obvious, once digitized, in software, simply square to remove the phase, or better still, a Costas Loop to sync demod. Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W

Re: [time-nuts] TICC TAPR and TimeLab

John: Thanks for the detailed reply. As I have said befire: No good deed goes unpunished. So another question. How do I get Timelab to sit up and play nice? I have the TICC cranking away with 10 MHz ref ans 1 PPS Chan A, both from the same locked GPSDO. #

Re: [time-nuts] HP-5372A and HP-5372A operation with no CRT display.

Magnus: The suspects were not hard to locate, leaking black goo. I did measure the actual values of most of the larger electrolytics on the A17, for future reference. On two boards, C414, 3300 mfd 35 vdc had to be replaced with new 3300 mfd 50 vdc units. One board had a good C414 with

[time-nuts] HP-5372A and HP-5372A operation with no CRT display.

The repair bench is up and successful on repairing the A17 video driver boards. This involved replacing bad caps. If anyone has a bad A17 board, particularly ones with obvious blown (literally) caps, I would be happy to repair and bench test. No cost other than send it to me with a prepaid, pre

Re: [time-nuts] FW: HP-5372A operation with no CRT display.

Ed: I see what appear to be good voltages from the mothor board into the A17 video driver board, that is Gnd, +12VDC, V Sync, HSync, and video (Intensity) Have a possibly good A17 board, on the bench along with a CRT, removed from instrument. Am testing voltages, waveforms, and Electrolytic

Re: [time-nuts] FW: HP-5372A operation with no CRT display.

Magnus; Thanks. The one thing, I think I know, is that the defection coils seem to work as expect. That was from testing with a low voltage variable supply. I have the TAPR TICC talking to TimeLab, as a free running ASCII source, but the TICC documentation is a bit cryptic. I will

Re: [time-nuts] FW: HP-5372A operation with no CRT display.

are. Cheers, Magnus On 2020-06-28 16:22, Lester Veenstra via time-nuts wrote: > > > TimeNuts: > > > > I have a HP 5732A with a defective CRT driver board. Since this (A17) > is undocumented (as no repairable) I am of course trying to work my way > around it to s

Re: [time-nuts] FW: HP-5732A operation with no CRT display.

Thanks Don, but I suspect we both have the same manual. Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N  78.9823741 W (GPSDO) Telephones: Home:    

Re: [time-nuts] FW: HP-5732A operation with no CRT display.

Ed: Like many cards and parts in this unit; Not field repairable, so no schematics or parts list. I do have the "full" maintenance manual. It appears to be a OEM Taiwan "Part", the CRT and driver board. Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD

Re: [time-nuts] FW: HP-5732A operation with no CRT display.

Dave:I have a "not working, parts only" unit coming. I will see if A17 is working on that unit. If I get one working, I think I can signal trace to the problem unit, using the good one as reference Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD

Re: [time-nuts] FW: HP-5372A operation with no CRT display.

Steve: I probably will be reduced to stealing the two assemblies from a 71 to go into the 72 Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

Re: [time-nuts] FW: HP-5372A operation with no CRT display.

Yes, but no schematics visible. Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com -Original Message- From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of Dave Miller Sent: Sunday, June 28, 2020 11:31 AM To: Discussion of precise time and frequency

Re: [time-nuts] FW: HP-5372A operation with no CRT display.

  +1-876-456-8898   -Original Message- From: Poul-Henning Kamp [mailto:p...@phk.freebsd.dk] Sent: Sunday, June 28, 2020 11:21 AM To: Discussion of precise time and frequency measurement Cc: Lester Veenstra Subject: Re: [time-nuts] FW: HP-5732A operation with no CRT display. ---- Lest

Re: [time-nuts] FW: HP-5372A operation with no CRT display.

I assume you mean HP-5372A---Yes, of course. Mind not fully in control Lester B Veenstra  K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com 452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N  78.982287 W (Google) GPS: 39.33682 N  78.9823741 W (GPSDO) Telephones: Home:   

[time-nuts] FW: HP-5732A operation with no CRT display.

TimeNuts: I have a HP 5732A with a defective CRT driver board. Since this (A17) is undocumented (as no repairable) I am of course trying to work my way around it to see if the defect is findable. Any A17 boards loose out there, or even better, documentation? I see good H and V