Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

On Sun, Nov 15, 2015 at 3:13 AM, Mark Sims wrote: > My bet is was just a power glitch or a corrupted message that raised the > alarm and that your unit is OK. If the error reoccurs then you may have a > hardware problem. After some further poking and prodding, I think

[time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

My bet is was just a power glitch or a corrupted message that raised the alarm and that your unit is OK. If the error reoccurs then you may have a hardware problem. There is an undocumented message that you can send to the unit to set the allowed range of the EFC signal. Default for the Tbolt

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

On Sat, Nov 14, 2015 at 12:00 AM, Bob Camp wrote: > Hi > > First thing to check is that it really *is* at limit. There apparently are a > few odd things > that can trigger the alarm. What sort of odd things might cause that? It was weird: yesterday LH highlighted the DAC value

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

Hi > On Nov 14, 2015, at 8:01 AM, Pete Stephenson wrote: > > On Sat, Nov 14, 2015 at 12:00 AM, Bob Camp wrote: >> Hi >> >> First thing to check is that it really *is* at limit. There apparently are a >> few odd things >> that can trigger the alarm. > > What

[time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

Hi all, Lady Heather just reported that my Thunderbolt's "osc age alarm" just activated. The manual tells me this means that the oscillator control voltage is at a rail and that the oscillator should be replaced. It says this shouldn't be needed during the first 12 years of service, but mine is

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

Hi I think you will find that tearing open a TBolt OCXO does not reveal a mechanical trimmer anywhere to be seen. That’s true at least if it was made past about 1997 … It’s unusual to see them actually age out. Most that I have seen still have > 90% of their trim range left. A much more common

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

> Where can I find a suitable replacement oscillator? Is there a > recommended part number? If the original part is no longer available, > what is a good substitute? > > Cheers! > -Pete Hi Pete, I have plenty of TBolt's from the group buy years ago. I'm sure there's a spare oscillator in

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

Hi, Sadly my tbolt is sick as well. There is some fault that causes the processor to constantly reset. I already had the outer screws undone, so I popped open the case to look for the trimmer you need. There is indeed a solder blob on one side of the oscillator, under which I would presume is

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

Typically all that means is the crystal needs to have its trimmer capacitor adjusted back into range. I have no direct knowledge of the TBolt's oscillator, but it might be as simple as removing a screw, and adjusting the trimmer... Or, in some cases you have to remove a solder blob from the

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

Pete, I would doubt anything is directly available. But if there is hope for some hack its certainly here from my experience. Hack may be the actual reality. Got a saw? Good luck because one day sooner then later I suspect I will ask the same question. Regards Paul WB8TSL On Fri, Nov 13, 2015 at

Re: [time-nuts] Thunderbolt "osc age alarm", where to get replacement oscillator?

Hi First thing to check is that it really *is* at limit. There apparently are a few odd things that can trigger the alarm. The OCXO’s out of the TBolt are sold on the auction sites from time to time. They seem to go for < $40 delivered. The footprint on the OCXO is pretty standard. You can