[Boatanchors] Pair of Crystals needed

[Dave Brown]

Sounds like an ideal application for one of the cheap chinese DDS units-but 
you need one set up to generate just the 2  frequencies you want with a 
simple switch to change between them, rather than the usual VFO arrangement. 
Probably need a bit of gain after the DDS as well to match the higher level 
needed for tubes.
73
 Dave, ZL3FJ

----- Original Message ----- 
From: "K7NKS" <k7nks at yahoo.com>
To: "Keith Densmore" <ve3gem at gmail.com>
Cc: <boatanchors at mailman.qth.net>
Sent: Sunday, March 09, 2014 4:57 PM
Subject: Re: [Boatanchors] Pair of Crystals needed


> Crystals for 455 KHz fall in the realm of the unobtainable dream unless 
> you have a very thick wallet.
>
> Best bet is to check any buddies that have either military surplus 
> crystals like others have mentioned or two-way radio surplus crystals.
>
> Years ago I scrapped out some Masters, Motracs, Micors, and Mocoms that 
> had IF filters that used crystals with a 455 KHz offset from the 1st IF 
> frequency. Don't remember the exact IF frequencies.
>
> 73,
> Chuck, k7nks
>
>
> Sent from my iPad
>
> On Mar 8, 2014, at 3:25 PM, "Keith Densmore" <ve3gem at gmail.com> wrote:
>
>> Hi All,
>> I need a pair of crystals, any size ok although smaller is preferred.
>>
>> 453    and   457     KHZ              or
>> 452.5  and  475.5  KHZ              or
>> 452     and  458     KHZ
>>
>> For a product detector circuit for rigs with 455 KHZ IF
>>
>> Thanks, 73,
>> Keith ve3ts
>>
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