[QuadList] Restoring an Ampex AVR-1

[John Walko]

Dave:

 

I am going by what two different engineers told me.  The one was the
engineer who worked on the machine during its life at the TV station it was
used at and the other was an engineer from our facility.

 

I can tell you this.the transformer was wired differently than in the
manuals we have.which makes this a little bit confusing.  We have the
original manuals from this machine, but the wiring diagrams don't exactly
conform to the way the transformer is wired.


The next time I am at the facility, I'll take a picture of the transformer
and email it to the group.

 

Thanks;

 

John Walko

 

From: quadlist-bounces at quadvideotapegroup.com
[mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of Dave Sieg
Sent: Monday, July 06, 2009 10:48 AM
To: Quad List
Subject: Re: [QuadList] Restoring an Ampex AVR-1

 

John:
Are you certain your building is wired for 208v 3 phase?  Unless it is a
very large industrial type building most are only wired with 240v two
phases.  You would have to take the front panel off your breaker panel to
see if there are three feeder buses or just two.  I have seen people who
don't understand the distinction wire the three "hot" pins of a 3-phase
connector to three adjacent breakers in a 240v two-phase panel which means
that two of the phases are essentially shorted together.  This might be part
of your problem. Another way to tell would be to use a voltmeter to confirm
that you have 208 volts between any two of the three "hot" contacts of the
power socket.  (You probably have an L21-30 connector, See
http://en.wikipedia.org/wiki/Industrial_and_multiphase_power_plugs_and_socke
ts#NEMA_10-20.2C_10-30_and_10-50  The "hot" contacts are the outer three
that do NOT have an L-shape)  I am not familiar enough with the AVR-1 to
know if there are tapping options to change it over to 240v but the manuals
should say.

Dave

On Mon, Jul 6, 2009 at 9:08 AM, John Walko <jwalko at scenesavers.com> wrote:

Park:

We sort of gave up on the AVR-1.  It is simply a time issue.we would really
like to get it working, but don't have the time to spend on it right now.
Maybe some time in the future.

The machine was working when it was taken out of service.  It has been
sitting without power for probably the last 5-6 years.  It appears as if the
machine was originally wired for a 208-three phase volt power supply, and
that is the way it is currently wired.  

-- 
Dave Sieg
http://www.davesieg.com

http://www.scanimate.net

 

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