Hi Tom - I found the TR502 manual online, info on the crystal in the tek common
parts manual (mechanical!), and a catalog page on Bliley crystal website.
Whether Bliley wants to grind another? I dunno.. The only resonance mode I have
seen in the tiny TO-5 package is a SC, Maybe nothing else will fit? JimMc
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-----Original Message-----
From: "Tom Lee" <tomlee@...>
Sent: Sunday, January 3, 2021 5:34pm
To:
[email protected]Subject: Re: [TekScopes] Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603
Hi Jim,
Very interesting -- could you post a link to where you found that
information?
Thanks!
-- Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 1/3/2021 10:24, J Mcvein wrote:
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@...>
Sent: Sunday, January 3, 2021 12:48pm
To: [email protected]
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
