[R-390] Query about R-388

[Transmaster]

There are Two models of the R388, the R399/URR, and the R388A/URR.
they are militarized versions of the 51J3, and the 51J4.  The major
difference is the R388 series has 100 ohm Impedance for the antenna
input verses 75 ohms for the civilian 51J.
To get this impedance there are several parts which are not installed
on the R388. These parts can be installed to give the R388's a 75 ohm
input but this can be done with external matching units.  The R388 /
51J3 has crystal filters, and  has a crystal phasing control.
The R388A / 51J4 has mechanical filters. My R388/URR  is my favorite
receiver, I have a EAC R390A which is in good repair and I still like
R388 better, heck I have a Sunair R-9200 digital receiver and I still
like the R388 better.

Ken de W7ITC

On 8/5/07, John Lawson <jpl15 at panix.com> wrote:
>
>
> On Sun, 5 Aug 2007, Kenneth G. Gordon wrote:
>
> > On 5 Aug 2007 at 20:54, Charles A Taylor wrote:
> >
> >>
> >>
> >> What I MEANT to ask is the Collins civilian equivalent to the R-388.
> >
> > 51J4
>
>     Ummm, no. 51J-3.
>
>     The 51J-4 has (among other things) a second 'width' lever concentric
> with the BFO knob.  The R-388 does not have this Feature...  at least no
> 388 I've ever seen has it.
>
> BTW, there's a pretty nice-looking 51J-4 on eBay now, ending tomorrow
> afternoon, $499 minimum bid, to 'takers' yet....
>
>    Item # 250148288467
>
>
>
> Cheers
>
> John
> KB6SCO
> DM09fg
>
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-- 
Kenneth A. Crips, W7ITC Home of the Chew Crew,  Red Headed
Irish Terrier House Ninjas, Chic', and Cowboy
10th degree black belts in Mouch Fue, Bed Fue, and
Con Artist Fue.