[TenTec] OMNI 5 GOES DEAD ON 40

[Kim Elmore]

I have: You can't access the proper leads externally. It's a PITA.

73,

Kim N5OP

On 2/10/2015 11:15 PM, Wade Staggs wrote:
> *O.K. I will be the first one to ask. Has nobody figured out yet where the
> positive and negative battery terminals are on this RAM Chip? Maybe I have
> just ask the Stupidest Question, ever ask on this forum. I have never seen
> one of these RAM Chips. Can somebody please send me a picture of an example
> Chip? It just seems to me that some fine wire leads and a battery holder
> with the correct voltage of batteries installed, could place an end to the
> whole problem. Aw Shucks, you could even install a small solar cell
> illuminated from an Ironman or Batman 7 watt nightlight ..... hi .. hi ...
> This is a good question ( I Hope ) Maybe the Internal Battery shorts to
> Zero Ohms? So that an outboard battery won't work? *
> *      As Johnny 5 Says .... Need Input !! 73 from Wade/KJ4WS*
>
> On Tue, Feb 10, 2015 at 9:35 AM, Carl Moreschi <n4py3 at earthlink.net> wrote:
>
>> The battery backed up RAM in the Omni V does not use the battery.  It uses
>> a RAM chip with a built in internal battery that cannot be changed.  These
>> chips were made many years ago with 10 year life lithium batteries in
>> them.  You can possibly buy a new one but even the new ones are more than
>> 20 years old and their internal batteries might also be bad.
>>
>> The 40 meter problem is most likely the 40 meter crystal.  When I had my
>> Omni V I found that I could adjust the trimmer on the 40 meter crystal and
>> make it run.  I ended up with about a 2 khz frequency error on 40 meters
>> but it worked.  My N4PY Omni V ship has a setup for recalibrating in
>> software and this solved my 40 meter problem.  But your battery backed up
>> RAM chip may not be as easily solved.
>>
>> Carl Moreschi N4PY
>> 58 Hogwood Rd
>> Louisburg, NC 27549
>> www.n4py.com
>>
>>
>> On 2/10/2015 10:19 AM, gary mankoff wrote:
>>
>>> OMNI 5 GOES DEAD ON 40 METERS AFTER 1 HOUR AND WILL NOT HOLD MEMORY OF
>>> LAST
>>> FREQ USED EVEN WITH NEW BATTERY... ANY HELP WOULD BE APPRECIATED...
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-- 

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP 
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"In theory there is no difference between theory and practice. But, in 
practice, there is." //– Attributed to many people; it’s so true that it 
doesn’t matter who said it./