[R-390] O.T. 618S

[Bob Camp]

Hi

Do you really think this single sideband stuff is here to stay?

There are more different outboard SSB adapters out there than you can 
easily list in a day.  Since you have a 455 KHz IF about 90% of them 
will work with the R-390. One of the better modern ones is made by 
Sherwood. The military adapters all have a certain look that goes well 
with a R-390 so they also are a good choice.

If you want to build something then I would do it as an outboard box 
that hooks into the IF output. There are a number of good ways to do it 
that don't cost a lot of money.

	Take Care!

		Bob Camp
		KB8TQ



On Aug 12, 2004, at 7:18 PM, Dave Maples wrote:

>
> all: I had an ARC-38A a while back.  Went through the agony of 
> building a
> 400 Hz PS for it (anyone need a 100 watt PA amplifier with a 400 Hz
> oscillator stuck in it?), large DC supplies, etc.,   Never had the 
> mounting
> chassis which contains a peculiar phase-shift network for the 400 Hz 
> so the
> closed-loop electromechanical synthesizer would work, so mine didn't 
> ever
> quite lock up.
>
> I think I'll pass on the 618-S.
>
> Side note: I'm nosing around for a sideband converter for my 390A.  I 
> ran
> into an Eldico SBA-1 a while back.  Is that useful as a converter?  Any
> other suggestions besides the two-diode mod (which works pretty well 
> but
> still leaves a little to be desired, IMHO, but is definitely the right
> price!).
>
> Thanks,
> Dave WB4FUR
>
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net
> [mailto:r-390-bounces at mailman.qth.net]On Behalf Of Cecil Acuff
> Sent: Monday, August 09, 2004 11:17 PM
> To: R390list
> Subject: [R-390] O.T. 618S
>
>
> Greetings group,
>
>         Anyone on this list also like to play with the Collins 618 
> series
> airborne radio...
>
> I have a 618S in pretty nice shape missing what looks like the large
> synthesizer deck.  The rest of it looks great.  Good PA section with 
> the
> tubes.  May be a nice parts unit for someone who tinkers with these...I
> don't.
>
> Contact me off list if interested.
>
> Thanks...
>
> Cecil...
>
>
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