[SignalOne] CX7 serial numbers

[Fred]

Hi Peter and Hi also to you Ed.
Happy New Year!
I sent the following in response to another request for SN info recently.
It echos what Ed said.  I am going to diligently look for my notes on 
the SNs and dates of production.  They date back to the early 2000s but 
I know they are here somewhere. HI HI  It may be  2 or 3 weeks but I 
will add this info to the web site and alert everyone here when it is done.

As for the serial numbers here is what we know.  And I am doing this 
from memory as I thought I had this info on the web site but I do not.  
I have the notes around here somewhere but it could take quite a while 
to find them.  I will do it after the first as this information should 
be posted.  So I hope my memory serves me well and the following info is 
correct.
The FL rigs had 5 digit SNs starting at 00100 or 00101 (not certain).  
The CA rigs had 9 and 10 digit SNs and to this day we can't figure out 
what the hell they were doing.  There is no logical pattern to the numbers.
The CA rigs were certainly CX7As but actually there were some of the 
later FL rigs that had most of the updates in them.  So it is difficult 
to say that at a certain SN they actually became CX7As. There were also 
a very few rigs with SNs 71-xxx.  I can't remember why right now.
Most of the radios have had many if not all of the A mods and most have 
also had the IC power supply upgrade done.  The early power 
supplies....well, they just sucked.  The pass transistors were 
constantly failing.
If you have most of the A mods, as I expect you do, and you have the LED 
keyer/counter and you have the IC power supply mods then what you have 
is considered a CX7B.  There were 3 or 4 CX7Bs made in NJ right before 
the CX11 came out.  The LED board is essentially a CX11 board with a 
different LED configuration.
I have 2 CX7s that I consider to be B models.


73 de
Fred
K5OG
www.k5og.com
www.signalone.org



Peter Sundberg wrote:
>
>
> This list is for discussions regarding collecting, repair, use and 
> sale of Signal/One radios and accessories.
>
> Documentation on Signal/One radios can be found at 
> http://www.hamanuals.com and several other sites on the Web.
>
> .
> Hi all,
>
> I am new to this group. I have finally acquired a CX7 with the 
> matching CX7S speaker and the ElectroVoice 676 microphone + service 
> manual.
>
> It took me 40+ years to afford this beauty.. :-)
>
> I would like to find out if the serial numbers are different between 
> the CX7 and CX7A?
>
> Reading the K5OG registry I see low numbers both for the CX7 and the 
> CX7A, so just curious if they are the same or separate series.
>
> 73
> Peter SM2CEW
> www.sm2cew.com
>
>
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