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Re: [Amps] input tuning

Subject: Re: [Amps] input tuning
From: "Roger (sub1)" <>
Date: Tue, 21 Jun 2011 01:16:04 -0400
List-post: <">>
On 6/21/2011 12:45 AM, Carey Lockhart, KC5GTT wrote:
> Hello guys,
> working on another gs-35 amplifier for 2 meters. i have noticed that all of 
> the tubes i have had have been different. that is to say not one tuned input 
> circuit has been the same. working on this one tonight i have noticed when i 
> touch the screw driver to the trimmer cap the input swr goes flat. remove the 
> screw driver and it has about 1.2 swr. which comes to about 200w of output 
> difference. these tubes seem to be very touchy. so what am i seeing. not 
> enough capacitance? righ now i have the screwdriver just laying in the hole 
> with a nylon spacer keeping it from ground and the input is perfect.

Use a tuning wand instead of a screwdriver.  Lost of rigs are very 
difficult to tune using metal screwdrivers.


Roger (K8RI)

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