38S construction - general

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From: HIMES@idicl1.idi.oclc.org
Date: Mon Mar 10 1997 - 11:30:31 EST


Mechanical:

For my 38S, I used the RS "Instrument/Modem" project case. Don't know the
RS p/n but most RS stores have them. It leaves about .75 inches at each side
of the pcb, & about an inch at front and back. It's tight but I got a 2.75
inch speaker and an LM386 audio amp pcb in there too.
Be careful to use something to insulate the various hardware pieces in there!

It's plastic; front and back panels that sit in vertical rails between
the top and bottom pieces. I didn't spend enough time optimizing
the control placements, so I have a less-than-optimal panel layout.
BUT! I'm gonna make new panels out of blank pcb or some other material,
since new ones can just slide right into place in the rails.

Electrical:

Worked right away (had bad 22.1184 crystal, now replaced).
I accidentally put 4 turns on one side of the transformer and it worked
ok anyway. I later rewound it correctly.
Tuning range is 10.093 to 10.118 (no RIT)
Tick keyer works great but thumps/clicks like crazy. Must fix that!
No Power mod yet. Want to see what I can do with 250 mW.
Them that hear me, thanks for listening carefully!

Excellent work, NORCAL and everyone else!

Marty WB8FNH Columbus OH 38S CQRp


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