[SignalOne] CX7 serial numbers

[Peter Sundberg]

Thanks for the info guys, all very interesting and much appreciated.

My CX7 labels says serial number 00119 and the label says it is 
manufactured in FLA. It still has the NIXIE-tube display, all digits 
working fine.

I have only inspected it briefly inside when blowing the dust out 
with high pressure air. I see what appears to be modifications to 
some of the circuits but I need to back track them to see what they 
really are. Doing so I will take pictures and put them on my webpage, 
I will also send some info and pictures to you Fred for the registry page.

I have been checking the webpages you are pointing to so I am 
familiar with all the material available and will digest all of it in 
due time.

At the moment I have a fair idea who brought this set with him to 
Sweden from the US in the 70's, I just need to do some more checking 
to verify this. If this turns out to be true, I actually operated 
this set briefly in a contest in 1977. I did not wash my hands for a 
week after that highlight in my early ham career... :-)

73
Peter SM2CEW




At 17:32 2016-12-26, Fred wrote:
>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
><http://www.k5og.com>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>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
>><http://www.sm2cew.com>www.sm2cew.com
>>
>>
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