[Boatanchors] Front panel for Viking Valiant needed

[Glen Zook]

Several years ago someone actually did some experiments on several Johnson Ranger and Valiant transmitters with the resistor in and out of the VFO chamber.  The conclusion was that with the resistor in the chamber the VFO stabilized much faster, sometimes when the resistor was outside, the VFO never stabilized.  The supposition was that the temperature compensation relied on the heat from the resistor.
 
Glen, K9STH


Website:  http://k9sth.com


________________________________
From: Paul Baldock <paul at paulbaldock.com>
To: boatanchors at mailman.qth.net
Sent: Sunday, November 6, 2011 11:44 PM
Subject: Re: [Boatanchors] Front panel for Viking Valiant needed

At 07:33 PM 11/6/2011, John King wrote:

>Electrically, it looks good and I have recapped it. It still doesn't
>have the 18K 10 watt dropping resistor modification placed under the
>chassis.

Some are of the opinion that moving the resistor out of the VFO 
chamber is a bad idea. The thought is that with the resistor in the 
chamber that the VFO is hotter so would be less affected by 
surrounded temperature changes (like a TCXO), such as from the five 6146s.

- Paul


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