HP 4333 -- haven't seen this one before - diyAudio
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Old 19th July 2004, 02:25 PM   #1
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Default HP 4333 -- haven't seen this one before

on EBay -- first time I have seen one -- seems to be a precedent model to the 339 distortion analyzer -- without an oscillator, and some auto-frequency detector. the seller misstates the lower threshold of measurement -- it is actually 10X better than advertised.
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Old 19th July 2004, 03:00 PM   #2
BrianL is offline BrianL  United States
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Hmmm. New to me and I thought I knew them all. Based
on the model number I'd GUESS that it's the measurement
section of a 333, but I could be mistaken. Sure has a different
look and really different knobs. Wouldn't be the measurement
section of a 339?? After all, they split off the oscillator
separately.

Is there a serial number? That could indicate roughly when
it was made. Also, it would give the country of origin
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Old 19th July 2004, 04:42 PM   #3
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Can't make out the s/n from the pictures.

http://cgi.ebay.com/ws/eBayISAPI.dll...e=STRK:MEBI:IT

I bet you haven't seen this one either -- the HP3770A -- circa 1974 -- a transmission impairment test set -- the switching power supply was busted and I got it for less than the manual cost:
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Old 20th July 2004, 04:59 AM   #4
BrianL is offline BrianL  United States
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Blowing up the rear picture from Ebay, it looks to me like
it says "Yokogawa Hewlett Packard" on the next-to-bottom
line and "Tokyo, Japan" on the bottom line. It's not that
clear, but I know what the different serial labels should
look like. I don't think it says "Hewlett-Packard GMBH"
or "Boeblingen Germany"

It's not listed in my 1984 HP catalog, so it was obsolete
by then.

So this scanty data indicates it may have been an odd-ball
product produced by YHP.

It probably works just fine, and might be useful (be sure they
give you a service manual). Personally, I find something like
a 339A to be much easier to use as it locks the source
and analyzer frequencies for much faster/easier reading.
(though that "auto fine" button may engage the servo tuning)

BTW, a Google search brings up no useful information.
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Old 26th July 2004, 09:00 AM   #5
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Smile YHP 4333A

Hello. The equipment is made by YHP in Japan. This is just a distortion meter without oscillators. I have one at home.
This is far better than 433 in view of high resolution and stability. I have a copy of the reference manual, but it is in Japanese. :-)
I had to wait for more than a year to get the copy from one of my friends of YHP.
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