[R-390] Cosmos PTO end point coil
Jim Miller
[email protected]
Fri, 27 Jun 2003 09:14:37 -0400
If you have the slug fully counter clockwise, you may need to run it in
clockwise more. The adjustment is an iterative process. See Dave Medley's
procedure at http://www.davemed.com/pto.html
----- Original Message -----
From: "Phil Atchley" <[email protected]>
To: <[email protected]>
Sent: Friday, June 27, 2003 12:26 AM
Subject: [R-390] Cosmos PTO end point coil
Hi.
Earlier I tried to set the end points on this unit. I got it within 3 KC at
which point the slug dropped into the PTO.
SO, I bravely pulled the PTO and carefully opened it up. I didn't observe
any unusual escape of nitrogen gas as I pulled the inner shield 8^) Anyway,
I reinserted the slug, removed 1 turn from the end point coil (it had 3
turns) and reassembled the PTO.
NOW IT'S WORSE THAN EVER. Best I get is within about 10KHz, that with the
slug turned fully anti-clockwise. The 100 KHz markers are 1000 and 1990 KHz
at the ends indicating that exactly 10 turns of the tuning dial are tuning
further than 1MHz. I only removed one turn but that appears to have been
too much. HOW MANY TURNS DOES THIS COIL TYPICALLY HAVE IN A CORRECTLY SET
UP UNIT? I wonder of someone previously removed turns?
Stoopid Cosmos PTO's!
73 de Phil, KO6BB
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