[R-390] Wanted: 14mHz Crystal

[Bob kb8tq]

Hi

A generic crystal from Digikey is not going to have the same temperature characteristic 
as the original. The radio may drift a bit as a result. 

it also may not have the ability to tune to the correct frequency. 

For < $1, try it and see is not that bad an idea. Just be willing to check things out a bit
and possibly buy a couple candidates.

Bob

> On Jul 4, 2026, at 6:42 PM, Fred Moore via R-390 <r-390 at mailman.qth.net> wrote:
> 
> Bill (and others needing crystals), 
> 
> 1.  I do have one from an R-390 (not A) oscillator unit.  Fair Radio was
> selling these for $20 near their end, plus shipping.  Payment by check.
> 
> 2.  But other crystals will fail from time to time.  So I went on
> Digikey.com... They have a bunch of crystals, mostly SMD types.  These could
> be put inside the original holder.  Even MHz are pretty common there.  What
> about drive levels?  Is a tube osc too much drive for this little thing? 
> There is a datasheet for it on this page.  So this approach might help others
> in the future. 
> 
> Here is one by CTS for $0.72: 
> https://www.digikey.com/en/products/detail/cts-frequency-controls/406C35B14M00000/604558
> 
> So this approach might help others in the future. 
> 
> -Fred 
> 
> ------ Original Message ------
> Received: Sat, 04 Jul 2026 05:22:44 PM GMT
> From: Bill Cotter via R-390 <r-390 at mailman.qth.net>
> To: r-390 at mailman.qth.net
> Subject: [R-390] Wanted:  14mHz Crystal
> 
> Happy July 4th!
> 
> Does anyone have a donor crystal bank with a 14mHz crystal they 
> would be willing to part with? Please advise with price + shipping 
> to my QTH (below).
> 
> Thanks es 73 Bill N4LG
> 
> 
> 
> 
> ------------------------------------------------------------
> Bill Cotter, N4LG              E-mail: n4lg at qx.net
> 173 Carolyn Lane               Cell: (859) 552-7481
> Nicholasville, KY 40356-9340 https://www.qrz.com/db/n4lg
> 
> ARCI #9878, QRPl #1646, QCWA #29393, FISTS #4535, NAQCC 7470
> ------------------------------------------------------------
> 
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