[time-nuts] Yet another GPSDO

Bob Camp kb8tq at n1k.org
Wed Nov 19 20:57:10 EST 2014


Hi

After some more digging, I was more than a bit high on my kit cost estimate. The MV89’s are $5-$6 on the market in China. The PCBs as a set are under $3. Best guess is that the kit (if that’s what it is) sells for under $25 un-assembled. 

Bob

> On Nov 19, 2014, at 7:37 AM, Bob Camp <kb8tq at n1k.org> wrote:
> 
> Hi
> 
> It also could be a club / group and these could be club design projects. If they are done from some sort of kit, the level of parts and workmanship may vary a bit. You do *not* want to buy the first Heathkit I ever built ….
> 
> Since the surplus GPSDO’s we buy for a hundred dollars or so mostly (but not always) come from China, I doubt that a group over there designed one that costs them the same sort of money. My guess is that, at least as a kit, the target cost was in the 25 cents on the dollar range ($50 or so). That’s not a bad thing at all, money matters. It may have limited what they could do compared to what’s in one of the surplus cell site GPSDO’s.
> 
> Bob
> 
>> On Nov 19, 2014, at 1:24 AM, Don Latham <djl at montana.com> wrote:
>> 
>> 
>> big 7 table
>> 
>> Don
>> Bob Camp
>>> Hi
>>> 
>>> The guy’s email *might* be: bg7tbl at 126.com
>>> 
>>> That also could be something else entirely.
>>> 
>>> Bob
>>> 
>>> On Nov 18, 2014, at 7:34 PM, Bob Camp <kb8tq at n1k.org> wrote:
>>>> 
>>>> 
>>>> Hi
>>>> 
>>>> … and indeed it is one. There are a whole range of this and that pieces of
>>>> test gear designed by the guy.
>>>> 
>>>> Bob
>>>> 
>>>>> On Nov 18, 2014, at 7:28 PM, Alan Hochhalter <alanh137 at gmail.com> wrote:
>>>>> 
>>>>> BG7TBL sounds like an amateur radio callsign.
>>>>> 
>>>>> Alan
>>>>> 
>>>>> On Tue, Nov 18, 2014 at 5:24 PM, Bob Camp <kb8tq at n1k.org> wrote:
>>>>> 
>>>>>> Hi
>>>>>> 
>>>>>> I’d say this has the look of a hobby / semi-pro project. I’ve seen several
>>>>>> of them done in other areas. Somebody comes up with a pile of parts at the
>>>>>> local market and does a board that at least sort of makes them work. Often
>>>>>> they are based on some sort of open source effort.  Without more
>>>>>> information, this is very much a “who knows” sort of thing.
>>>>>> 
>>>>>> Bob
>>>>>> 
>>>>>>> On Nov 18, 2014, at 7:19 PM, Arthur Dent <golgarfrincham at gmail.com>
>>>>>> wrote:
>>>>>>> 
>>>>>>> You can see a similar product by this seller direct -
>>>>>>> 
>>>>>>> http://www.cart100.com/seller/bg7tbl/
>>>>>>> http://www.cart100.com/Product/38848104218/
>>>>>>> 
>>>>>>> Looks like a similar product at almost 3 time the Ebay price.
>>>>>>> There are more photos at the second link under 'specifications'
>>>>>>> and you can read MV89A on the Morion oscillator and see some
>>>>>>> wires patching an error on the bottom of the PC board. Note that
>>>>>>> the seller also has a frequency doubler at about $10.
>>>>>>> 
>>>>>>> -Arthur
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>> 
>> 
>> -- 
>> "The power of accurate observation is commonly called cynicism by those who
>> have not got it."
>> -George Bernard Shaw
>> 
>> Dr. Don Latham AJ7LL
>> Six Mile Systems LLC
>> 17850 Six Mile Road
>> Huson, MT, 59846
>> mail:  POBox 404
>> Frenchtown MT 59834-0404
>> VOX 406-626-4304
>> Skype: buffler2
>> www.lightningforensics.com
>> www.sixmilesystems.com
>> 
>> 
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> 



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