[Boatanchors] Drake Crystals

[KA2PTE]

Interesting - as you remove crystal material, freq ought to go up correct?

--
Steve Hearns [ KA2PTE ]


----- Original Message ----- 
From: "David Stinson" <arc5 at ix.netcom.com>
To: "Richard Knoppow" <1oldlens1 at ix.netcom.com>; 
<boatanchors at mailman.qth.net>
Sent: Wednesday, September 22, 2021 5:48 PM
Subject: Re: [Boatanchors] Drake Crystals


> On 9/22/2021 2:04 PM, Richard Knoppow wrote:
>
> > More modern crystals are plated. The plating acts as the electrode
> on each side. This results in a more stable crystal and also makes it 
> possible to trim the frequency very precisely by controlling the thickness 
> of the plating. I don't think there is much you can do to trim the 
> frequency.
>
> ---------------
>
> Actually, you can move plated crystals up,
> just like older crystals. WHINK will remove
> the plating very quickly, and as a result, immersing
> the crystal in WHINK for just 5 seconds can make a
> major move in the crystal. How much depends on
> the crystal's construction and how thick the plating.
> If you try this, have a rinse container ready. Immerse
> the crystal in WHINK with a plastic or wooden tool.
> It will start bubbling a lot. Remove it in 5 seconds
> and immediately, thoroughly rinse it. Dry and see how
> much it moved.
> Good Luck<
> Dave S.
>
>
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