Lead-acid batteries, even modern sealed AGM types, will vent some gasses over time that can be corrosive - so I was told by a battery expect a few months back...
Those are very nice counters, it is reciprocal so it's great for low frequencies. My unit has the C option, bujt it did not have the OCXO. So I made a board with a Isotemp OCXO oscillator and some power and signal conditioning stuff that can plug straight into the oscillator header. I repurposed the 'battery charged' LED to indicate the oven is ready, that is available on the battery option header :)
wow that is a great idea, i think also it could be an idea to make auto detect and then auto switch over to internal 10MHz vs external 10MHz like most modern equipment can do, it is not a very complex circuit to make.
@@TeardownOZ2CPU Yes, I added the option for an external clock (with a 74hc00) but never needed it and never got around to mounting a BNC on the back. " I used the 'battery discharged' LED to indicate an external signal. But the OCXO is more than good enough, I have a GPSDO (the Trimble unit's that flooded ebay about 10 years ago) but don't feel like running that thing all the time.
I will never forget my first days in electronics class in high school I kept seeing all of this old surplus equipment from the 50's and 60's that had been dedicated to the school system and they would have a light on it that said oven ready.. lol and I was thinking why the hell would they use this in a kitchen so the question got the best of me and I asked my electronics teacher and he got a kick out of it and then taught us the use of ovens in crystal oscillator. BTW I have the 5316A rack mount and it has a very different main board then the smaller bench top model but the front end board looks almost interchangeable they are very nice counters.
I m not sure i understand your question, i do own both Rubidium and GPS standard, none of this was used in this video, i just used a normal dual output signal generator as signal source
@@TeardownOZ2CPU must be an error which I found on the subtitle. I heard that you said it. I thought that it could be rubidium. Perhaps the translator did not undetstand
@@perttisalonen850 i will be super happy to fix errors in the auto generated subs, sometimes i mumble a bit, or noise in the background makes it confused, please tell the time in the video, then i go fix it.
@@TeardownOZ2CPU I think it's at 10:06 where you mention "connect the 10MHz to my rubidium" the subtitle says "obedium". Thanks for the teardown and interesting to compare the insides to what CuriousMarc has been doing with his frequency counter.
I have a 5315a without the battery option. Is there a simple way to install a battery (without the charging circuit)? So the item can be used until the battery is empty, then removing it, charging it, and re-inserting it? Greetings
@@TeardownOZ2CPU Thank you for the ultra-fast answer. So far no operation and service manual I found online contained the schematics but I will continue to look.
It's beautiful, it looks like when it just left the factory, I had a similar one at work, it's nostalgia.
Nice day 🙂 Tom
Lead-acid batteries, even modern sealed AGM types, will vent some gasses over time that can be corrosive - so I was told by a battery expect a few months back...
Those are very nice counters, it is reciprocal so it's great for low frequencies. My unit has the C option, bujt it did not have the OCXO. So I made a board with a Isotemp OCXO oscillator and some power and signal conditioning stuff that can plug straight into the oscillator header. I repurposed the 'battery charged' LED to indicate the oven is ready, that is available on the battery option header :)
wow that is a great idea, i think also it could be an idea to make auto detect and then auto switch over to internal 10MHz vs external 10MHz like most modern equipment can do, it is not a very complex circuit to make.
@@TeardownOZ2CPU Yes, I added the option for an external clock (with a 74hc00) but never needed it and never got around to mounting a BNC on the back. " I used the 'battery discharged' LED to indicate an external signal.
But the OCXO is more than good enough, I have a GPSDO (the Trimble unit's that flooded ebay about 10 years ago) but don't feel like running that thing all the time.
I will never forget my first days in electronics class in high school I kept seeing all of this old surplus equipment from the 50's and 60's that had been dedicated to the school system and they would have a light on it that said oven ready.. lol and I was thinking why the hell would they use this in a kitchen so the question got the best of me and I asked my electronics teacher and he got a kick out of it and then taught us the use of ovens in crystal oscillator. BTW I have the 5316A rack mount and it has a very different main board then the smaller bench top model but the front end board looks almost interchangeable they are very nice counters.
It's like watching the first 20 minutes of the _2001 - A Space Odyssey_ movie.
Hi! Thank you for your video. Is your obedium actually a 10 MHz Rubidium oscillator?
I m not sure i understand your question, i do own both Rubidium and GPS standard, none of this was used in this video, i just used a normal dual output signal generator as signal source
@@TeardownOZ2CPU must be an error which I found on the subtitle. I heard that you said it. I thought that it could be rubidium. Perhaps the translator did not undetstand
@@perttisalonen850 i will be super happy to fix errors in the auto generated subs, sometimes i mumble a bit, or noise in the background makes it confused, please tell the time in the video, then i go fix it.
@@TeardownOZ2CPU I think it's at 10:06 where you mention "connect the 10MHz to my rubidium" the subtitle says "obedium". Thanks for the teardown and interesting to compare the insides to what CuriousMarc has been doing with his frequency counter.
@@benryves thanks a lot for the info, now i have fixed the auto subs, so it is a lot more correct
I have a 5315a without the battery option. Is there a simple way to install a battery (without the charging circuit)? So the item can be used until the battery is empty, then removing it, charging it, and re-inserting it? Greetings
see in the schematic, how to input voltage to the local regulators, that could work
@@TeardownOZ2CPU Thank you for the ultra-fast answer. So far no operation and service manual I found online contained the schematics but I will continue to look.