Re: Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603


J Mcvein
 

Greetings Attilio - I did some research on the 502, and the xtal that tek used.
It is a SC cut 3d overtone series resonant crystal in a TO-5 transistor package.
Bliley Crystal in the US still might offer this cut.
The parts I have are AT cut 3 OT 7pF shunt resonant. My experience with them
is that they have a sharp resonance range. In the 502, the crystal Fc is stretched in
a VCXO circuit to effect the tracking of the SA. An AT cut crystal will move a bit
in frequency then just quit oscillating. It will also not fit in the available space. -J-

-----Original Message-----
From: "Attilio" <a.alovisetti@alice.it>
Sent: Sunday, January 3, 2021 12:48pm
To: TekScopes@groups.io
Subject: Re: [TekScopes] Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603



Jim Mcvein,
do you have any news for me in relation to 52.5 MHz crystal?
I am in Italy, if you give me your bank details and the amount I have to pay for the crystal and the shipping costs, I will make you an international bank transfer
Alternatively I can pay with PayPal..

Thanks

-- Cheers
Attilio

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