[R-390] EAC SSB Conversion

[Tom Chirhart]

Did the mod include a nice matching grey plate that went over the BFO that had USB and LSB? Years ago I saw one on that Pay site.. And haven't seen one since.... Years ago I picked up an EAC 67 with the plate, top/bottom covers, not sure of the mod inside as I have yet to open it up or plug it in...so not sure it's a Columbia mod or not.
73
Tom K4NCG


Sent from my iPad

On Apr 30, 2013, at 3:30 PM, Dave Merrill <r390a.urr at gmail.com> wrote:

> Several years ago I contacted Columbia Electronics to see if they had any
> info on the conversion but came up empty.
> 
> 
> On Tue, Apr 30, 2013 at 2:10 PM, Todd, KA1KAQ <ka1kaq at gmail.com> wrote:
> 
>> On Tue, Apr 30, 2013 at 2:54 PM, Dennis Deaton <wa6acc at verizon.net> wrote:
>> 
>>> 
>>> Several years ago, an article was published giving both the picture and
>>> the schematic that EAC had produced for a foreign military's mod to the
>>> R-390A to give it good SSB reception. It involved building a small
>>> crystal-controlled BFO and product detector using a 6U8. Does anyone on
>> the
>>> list have that data? If not, could you point me to it?
>>> 
>> 
>> If memory serves me correctly, it was Columbia Electronics that converted
>> them for the Mexican government. Try google with R-390A, SSB, and one or
>> either of those items and see if anything comes up. The article might have
>> been in Electric Radio.
>> 
>> de Todd/'Boomer'  KA1KAQ/4
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