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questions to ask: buying a 494P


 

Hi All,

I am interested in getting a Tek 21GHz 494P (possibly from eBay), and probably will need international shipping to New Zealand. I wonder if you guys can help with a succinct list of issues that I need to address.

Import: I have an import license, so not too concerned about incoming paperwork, local taxes etc.

Export: A web site indicates that 494P may possibly be subject to US export control, in the form of "22 CFR". Is this true ?

Technical: expensive things that must work to spec: YIG LO, YIG pre-selector, CRT and mixer. Anything else to watch out for with this unit ? How good is the power-on-self-test of the unit ? catching CRC errors in EEPROMs is easy, but I am hoping for a more thorough internal loop-back of RF.

Seller: Finding a seller with decent eBay feedback and who can check the 100MHz ref level on the unit seems a minimum. I believe that the same mixer is used for all bands, so is this a strong enough single test of YIG stability, and mixer function ? Anything else that is a valuable, quick and easy test ?

Shipping: I have had success getting a 40kg SA shipped using Bax Global from USA to NZ. Any experience with international shippers and insurance who won't charge the earth (also, who not to use) ?

Thought, comments and pearls of wisdom always appreciated.

Thanks,

Mark

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