@febo.com
Sent: Thursday, 19 September 2013, 22:56
Subject: [time-nuts] Varian 921-0062 ion pump supply question
Here is the deal.
The 4 terminal TX wiring is pretty obvious. (I have a unit with the 4
terminal to compare with)
The 6 terminal I have ohmed out and it is not obvious!
Pins 1 to 3 and 2
Robert G8RPI.
From: cdel...@juno.com cdel...@juno.com
To: time-nuts@febo.com
Sent: Thursday, 19 September 2013, 22:56
Subject: [time-nuts] Varian 921-0062 ion pump supply question
Here is the deal.
The 4 terminal TX wiring is pretty obvious. (I have a unit
Hi,
I'm working on a Varian 921-0062 ion pump controller for the pumps used
in a Maser.
I just got it in and it is wired for 240 VAC and I want 120VAC.
My manual and the ones I can find on line show a power TX with 4 input
terminals which they show how to strap for 240 or 120 VAC.
My unit
2013, 20:43
Subject: [time-nuts] Varian 921-0062 ion pump supply question
Hi,
I'm working on a Varian 921-0062 ion pump controller for the pumps used
in a Maser.
I just got it in and it is wired for 240 VAC and I want 120VAC.
My manual and the ones I can find on line show a power TX with 4 input
Try a Google search on it, you will find the manual.
73, Dick, W1KSZ
On 9/19/2013 12:43 PM, cdel...@juno.com wrote:
Varian 921-0062 ion pump controlle
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Here is the deal.
The 4 terminal TX wiring is pretty obvious. (I have a unit with the 4
terminal to compare with)
The 6 terminal I have ohmed out and it is not obvious!
Pins 1 to 3 and 2 to 4 (.5 Ohms) appear to be the 120VAC windings and
hooking them in parallel should do the trick.
As wired
