[Amps] HP5328A Counter

[Will Matney]

Bill,

This one has it too (oven oscillator, option 010) but I forgot to mention it. That gives 5 X 10^-9 of final value on 20 minutes of warmup and an aging rate of the same per day after 24 hours. The standard oscillator is like 1 X 10^-7. I didn't need the HP-IB interface as I just wanted a good accurate bench counter. It's kind of odd though that it don't have it with all the other options they added to it. Of course it could be added in the future from an old junker which does come up a lot. When I first tried it, I forgot about that and tried a signal as soon as I powered it up and it cold. I noticed it had a very slight drift then it hit me what was up. I let it warm up for 30 minutes and it was stable as a rock. I checked it against another calibrated counter I have here and it was right on the money. I have a 5-1/2 digit DMM here by by Data Precision which uses an oven zener diode in the precision power supply part. You have to let it warm up a spell too.

Best,

Will


> 
> A lot of these were built with HPs high stability oscillator in them.
> 
> Bill
> 
> -----Original Message-----
> From: "Will Matney" <craxd at engineer.com>
> To: amps at contesting.com
> Date: Sat, 16 Jul 2005 17:10:48 -0500
> Subject: [Amps] HP5328A Counter
> 
> All,
> 
> I received the HP 5328A counter today with the 1.3 GHz option and 
> voltmeter option. The pics didn't do it justice as it looks almost 
> new except for the stain on top left by glue from a tag or label. 
> It included a shielded BNC adapter for the voltmeter terminals and 
> a Tektronix P6028 1X probe which I did need for my scope. Really, I 
> was looking for just another bench counter so the DVM is a plus. I 
> just tried it out on all modes and it worked like it should. I 
> ended up with $49 in it not counting shipping which was $17 if I 
> remember. I've seen just the scope probe bring $25 to $30 on ebay. 
> Plus hardly ever does the 1.3 GHz option ever show up, mostly up to 
> 550 MHz. A clean one of these with no DVM has been bringing about 
> $30 on ebay. The DVM adds about $10 I've noticed. I wonder if the 
> price was right or too high? The reason being, if I ever wanted to 
> re-sale it, what would be a fair price?
> 
> Best,
> 
> Will
> 
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