Envelope-to: g3yxm@wireless.org.uk
Delivery-date: Sat, 17 Dec 2005 17:18:59 +0000
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Date: Sat, 17 Dec 2005 17:15:00 +0000
From: Dexter McIntyre W4DEX <dmcintyre@att.net>
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To: LowFer LWCA <lowfer@lwca.org>, RSGB LF <rsgb_lf_group@blacksheep.org>
Subject: [LW] =?ISO-8859-1?Q?G=D8MRF_300_watt_amp_VSWR_protection_?= =?ISO-8859-1?Q?circuit_?=
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What is the proper procedure for adjusting the controls of the GØMRF 300 
watts LF amplifier VSWR protection circuit?  I recently had a FET to 
fail due to the antenna going off resonance when the loading coil 
windings received a coat of ice.  I had the protection circuit working 
initially by detuning the antenna and trial and error tweaking the 
controls.  The circuit failed to work because of a poor ground 
connection at a plated through hole on the control IC.  I now seem to 
have the amp and protection circuit working again but this time would 
like to adjust the circuit properly.

Thanks,
Dex, W4DEX / WD2XKO


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