Re: [time-nuts] MTI 260-0624-D OCXO

Hi Mike, look for any kind of radio-receiver, which would receive around 5MHz the old 60 meter broadcast ban, connect to power any kind of wire which could serve as antenna turn it on and try to find WWW at 5MHz, after that power up your 5MHz oscillator connect piece of wire to the 5 MHz

Re: [time-nuts] MTI 260-0624-D OCXO

Bob, In this case, I know how it was taken off the board - it wasn't. They just cut the board around it. I had to remove it myself. Nice thing about that, is that I got a nice plastic, pre-formed part that fits between the board and the OCXO, probably as an insulator. You are also right about

Re: [time-nuts] Seeking HP 3561A schematic diagrams - thank you

I want to thank everyone who provided helpful comments regarding the sick HP3561A, both on and off the list. Special thanks also to a list member who made PDFs of V1 and V2 of the service manual available. As it turns out, the only fault I have found so far was fixed before we received the

Re: [time-nuts] MTI 260-0624-D OCXO

Hi Best guess is these things get taken off the board with either a big torch or a charcoal fire. You can ask Mr Google to dig up pictures of the process. Depending on just how quick they are, the insides of the OCXO can easily be reflowed. The likelihood of it reflowing and cooling back to

Re: [time-nuts] Another GPSDO quirk - KS-24361

wb...@gci.net said: >> http://users.megapathdsl.net/~hmurray/time-nuts/GPSDO/KS-volt-2016-Feb-14.p ng > All looks normal to me. Something appears to have driven f of both units > off. The DAC is typical of recovery and overshoot of an upset in f. Since > both LTE-Lite and KS-24361 experienced an

Re: [time-nuts] Calibration procedures - what is normal?

Am Sat, 13 Feb 2016 18:41:02 +1300 schrieb "Dave Brown" : > Cobham is a UK based defence and high end security supplier- > originally formed (not too many years ago) by their buying out of > several other companies in their lines of business. More recently > they have got

Re: [time-nuts] MTI 260-0624-D OCXO

The vendor is resending it. He has not said what he wants done with the dead one. Probably nothing, in which case I will tear it apart. Probably won't fix anything, but at least I'll get a good look inside. And the SC crystal could always be used in a custom DOCXO. Mike > I've had essentially

Re: [time-nuts] MTI 260-0624-D OCXO

On Tue, Feb 16, 2016 at 07:58:21PM -0500, time...@metachaos.net wrote: > I just received a 5Mhz OCXO from eBay (MTI 260-0624-D OCXO). After testing it, > it is clear that it is defective. > >1. It never heats up. >2. The reference voltage is zero. >3. Only noise is seen on the output

Re: [time-nuts] MTI 260-0624-D OCXO

Hi What I have found on all of these is that the harder you look, the more you toss out. I get a lot more from some batches than others to this or that point in the testing. In some groups > 80% of them do not have working ovens or an output > 0 dbm. There are no hard specs on these surplus