> Didn't the R390A require an external SSB adapter to become a "real"
> SSB receiver (selectable sideband and a product detector) ?
Yes.... The TMC mfg CV-591A and it's variants were the most popular. See
one on my web page as part of my listening R-390A listening station.
Interestingly R-390A's with their RTTY and SSB adaptors were feverishly
sought from mothballs and refurbished during Desert Storm to replace their
high end solid state replacements. The current rigs suffered from problems
with heat, sand and static from the blowing sand in zero humidity. Many a
front end was lost... The failure rate of the WJ receivers was especially
high... mainly due to heat from clogged filters.
I have one of a run of several hundred military R-390A cabinets (CY-979A)
made in the 1990's for housing the units called up... my 390 sits in it.
The R-390A is also the most immune from EMP....which may prove useful soon.
Mike
--
Michael Melland, W9WIS
Winneconne, Wisconsin USA EN54pc
qrp-l #1656 - qrparci # 9875 - iparc #252
ars #1075 - http://webpages.charter.net/w9wis/
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