[R-390] O.T. 618S

[Dave Maples]

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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