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Re: [Amps] Cheap network analyser on eBay

Subject: Re: [Amps] Cheap network analyser on eBay
From: "Will Matney" <>
Date: Fri, 24 Jun 2005 18:57:13 -0500
List-post: <>
I'd buy that myself if it works but I overspent this month. I would however 
want to see some pics of it powered up before I bought it. I hardly ever buy or 
bid on equipment if there not under power when the pic is taken. If I'm 
interested, I have the seller to e-mail the pics. If they wont, I dont buy it. 
That would give them the excuse that it tore up over shipment.



----- Original Message -----
From: "David Kirkby" <>
To: "" <>
Subject: [Amps] Cheap network analyser on eBay
Date: Sat, 25 Jun 2005 00:44:47 +0100

> There is on eBay at the minute what appears to be a very cheap HP
> network analyser, which I guess would double as a cheap power meter too.
> The "buy it now" is under $75. Cheaper than the amateurish instruments
> that give "some idea about the magnitude of the impedance".
> It's an HP 3570A, which the tucker web site give a bit of info
> although I think the max frequency is 13MHz, not 500 as stated there.
> Hence the frequency range is a bit limited.
> Here's a bit more info.
> The unit on eBay has option 004, which is the GPIB interface, so you can
> read (and often set) the instrument via a computer.
> The seller is definitely in what I would call the "doggy" category.
> Although he has over 1000 feedbacks, there are a lot of negatives (94.8%
> positive).
> A friend tells me the model number indicates it is likely to be very old.
> Anyway, here's the link to the eBay site.
> It's clearly not without its risks, and I don't know much about it, but
> on the face of it, the unit would seem quite cheap and useful. But
> perhaps someone knows otherwise.
> You could extend the frequency range with mixers and a couple of sig
> gens, but then calibration would be much more difficult.
> PS
> If you do buy it, do your homework. Don't blame me if it needs an XYZ
> that is impossible to obtain, or if its dead and the seller will do
> nothing about it.
> --
> David Kirkby,
> Please check out
> of if you live in Essex
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> Amps mailing list

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