[time-nuts] Rack flange kit for 5370B and 3325B

Hi, I've been looking for a bit with no luck so I thought I'd try here. I wish to mount my HP/Agilent 5370B and 3325B in a rack. Now the HP part 5061-0077 (also known as 3325B-908 or 5370B-908) and called a Rack Flange Kit (no handle version - although the handle version would be fine) looks

Re: [time-nuts] TimeNuts Assistance Request (Didier Juges)

Hi Didier, Yes, the 440Hz is primarily a reference for tuning musical instruments or calibrating tuners (i.e. PC sound cad based). In doing a little market research as to the free frequency service, this freq. was preferred to the normal 500Hz or 600Hz and still just within analog telephone

Re: [time-nuts] TimeNuts Assistance Request (Didier Juges)

In message [EMAIL PROTECTED] m, Baragwanath, Chris (TSG) writes: Yes, the 440Hz is primarily a reference for tuning musical instruments or calibrating tuners (i.e. PC sound cad based). In doing a little market research as to the free frequency service, this freq. was preferred to the normal

Re: [time-nuts] Rack flange kit for 5370B and 3325B

I, too, have been looking for rack mount ears for similar units (5334B, 3325A, 3335A, 8657A, 5087A, 105B, 8130A, etc.) with no luck. If there is anyone with a source or another idea of how to accomplish rack mounting without the HP ears, I would like to hear about it also. Thanks, Joe

Re: [time-nuts] Rack flange kit for 5370B and 3325B

In a message dated 21/07/2008 12:22:23 GMT Daylight Time, [EMAIL PROTECTED] writes: If there is anyone with a source or another idea of how to accomplish rack mounting without the HP ears, I would like to hear about it also. - Make your own from aluminium stock

Re: [time-nuts] Rack flange kit for 5370B and 3325B

At 07:19 AM 7/21/2008, J. L. Trantham wrote... If there is anyone with a source or another idea of how to accomplish rack mounting without the HP ears, I would like to hear about it also. Rack shelves. If you need more security, it should be pretty easy to figure out a way to bolt the device to

Re: [time-nuts] Rack flange kit for 5370B and 3325B

Would not a piece of aluminum or steel L stock work with washers or flat stock next to the case ? For an inexpensive source I use metal bed frames painted with primer and epoxy paint after the holes are drilled. I use a abrasive saw instead of a hack saw, less effort to cut them to length or

Re: [time-nuts] Double ovened 10811-60158 on ebay

PCA coatings thin enough chemically friendly enough to permit component replacement simply delay the effects of increasing ambient humidity on the circuits exposed. If the PCA fabrication processes leave the finished surface VERY clean, then several brands of conformal coatings will permit the

Re: [time-nuts] Thunderbolt etc software?

Murray Greenman wrote: TIMEKEEPERWorks well. Hello Murray, what is Timekeeper please, I tried searching the Trimble site but failed to find any hits? Regards Paul -- 73 de Paul GW8IZR IO73TI http://www.gw8izr.com ___ time-nuts

[time-nuts] HP58504A antenna

Hello all, I´d like to repair a HP58504A antenna that don´t deliver any output signal. The current is about 30 mA ( I think too high), and the transistor (unknown type) and the MMIC (uPC2749TB), seems to be with correct voltage. Does anyone have any experience or data about this antenna? I

Re: [time-nuts] HP58504A antenna

Jose - If it is similar to the HP two way GPS power splitter, then the MMIC is a voltage regulator used to deliver 3 volts to the amplifier transistor. In my splitter the MMIC died, so, not having another, I cut it out and soldered in a wire from the 5 volt input to the 3 volt output and then the

Re: [time-nuts] Thunderbolt vs Z3801A

Hi Didier, the drawback of this approach is that everything is connected together as one big circuit, and thus processor noise can get into the GPS front end and reduce the sensitivity and cause other errors.. For RF performance, it's probably better to have the GPS receiver sit all by

Re: [time-nuts] HP 113BR manual scanned

Hi David, As followup to your question, my friend at Agilent tells me they will take scans of any manuals (even for very old instruments) but they probably won't post it until someone asks for it. He says it's still better to contribute it because it's better to have it than not, even if it

Re: [time-nuts] HP58504A antenna

Hi Jose, If you trace out the power feed (the bottom direction from the coax connection) it supplies the transistor (most likely a MMIC) and the black 6 legged active device (no idea on it). The silver square looks like a filter device of some sort between what you call the transistor and the

Re: [time-nuts] HP58504A antenna

WB6BNQ wrote: Hi Jose, If you trace out the power feed (the bottom direction from the coax connection) it supplies the transistor (most likely a MMIC) and the black 6 legged active device (no idea on it). The silver square looks like a filter device of some sort between what you call the

Re: [time-nuts] HP58504A antenna

Jose Manuel wrote: Hello all, I´d like to repair a HP58504A antenna that don´t deliver any output signal. The current is about 30 mA ( I think too high), and the transistor (unknown type) and the MMIC (uPC2749TB), seems to be with correct voltage. Does anyone have any experience or data

Re: [time-nuts] HP58504A antenna

Hi Bruce, I looked at that also. Using OPERA browser I can zoom in really well and at 400 % you can just make out the trace under the coating and other stuff obscuring the view. BillWB6BNQ Bruce Griffiths wrote: Jose Manuel wrote: Hello all, I´d like to repair a HP58504A antenna

Re: [time-nuts] HP58504A antenna

Jose Manuel wrote: Hello all, I´d like to repair a HP58504A antenna that don´t deliver any output signal. The current is about 30 mA ( I think too high), and the transistor (unknown type) and the MMIC (uPC2749TB), seems to be with correct voltage. The resistive voltage divider feeding

[time-nuts] Stability vs. Accuracy

I'm not a scientist or engineer but have a question to those of you who are. The many recent posts regarding the GPSDOs and comparisons between the various ones  have been comparing stability. How about accuracy compared with the national frequency standard? Are stability and accuracy the same?

[time-nuts] humidity sensitivity of 10811

Some mention has been made recently of the sensitivity of the pervasive and ubiquitous 10811 to humidity changes. What sort of general magnitude are we talking about here.. 1E-12, 1E-9, etc. Jim Lux ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] HP58504A antenna

christopher hoover wrote: Jose wrote: I?d like to repair a HP58504A antenna that don?t deliver any output signal. The current is about 30 mA ( I think too high), and the transistor (unknown type) and the MMIC (uPC2749TB), seems to be with correct voltage. Does anyone have any

Re: [time-nuts] HP58504A antenna

Correction: Resistor values used are probably: 100 = 10 ohms 560 = 56 ohms or is it 680 = 68 ohms? 101 = 100 ohms 121 = 120 ohms 181 = 180 ohms 221 = 220 ohms 271 = 270 ohms Thus the total resistance from the 5V supply to the output terminal of the input device is actually = 220 + 10 + 10 =