[Milsurplus] MAK Transmitter osc

[Mike Feher]

Very clever Breck. 73 – Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of B. Smith
Sent: Monday, February 17, 2020 10:17 PM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] MAK Transmitter osc

 

 And anytime you are experimenting with feedback on a crystal oscillator you might be playing "Crystal Roulette" A simple crystal current checker can be fabricated. I usually use a 30-40 ma bulb and prefer that it not glow at all in the circuit. Those Chinese crystals may not survive in high current 30-40 ma circuits. 
73 k4che


On 2/17/2020 6:08 PM, David Stinson wrote:

Ken's suggestion is a good one, but don't "go overboard." 
This kind of feedback directly increases crystal current. 
"A little dab will do ya..." 




 

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