New Subject IB-1103 counter need NL-950S nixies

[Tom Chesek]

Sorry that I can't help with the parts but I thought that I'd mention my 
experience. I have an IB-1103 and the power supply board runs extremely hot 
in the +5 volt circuit. You will almost burn your fingertips if you touch 
the components on the board. I literally replaced every part on that board 
plus the outboard mounted voltage regulators. The regulators don't run hot 
and if I disconnect the output from either +5 volt regulator the board runs 
cool to the touch. I basically gave up on the problem since I have a few 
different freq counters and didn't want to put more time into it.  I have 
seen at least 2 IB-1103 counters sell on eBay in the last few years with a 
muffin fan mounted to the top of the case so I don't know if that is 
indicative of others with a similar issue. The counter works normally but I 
can't help but think that any moment it will go up like a piece of burnt 
toast.  I haven't taken the time to put an ammeter in each +5 volt branch 
but I'm sure that it would help me determine which one has a heavy current 
demand. It might be something as simple as a shorted cap somewhere.

Tom K3TVC


--------------------------------------------------
From: "brad" <ballen at FRONTIERNET.NET>
Sent: Tuesday, February 02, 2010 2:09 PM
To: <HEATH at LISTS.TEMPE.GOV>
Subject: [HEATH-TEMPE] New Subject IB-1103 counter need NL-950S nixies

> Hi gang, I now has a IB-1103 Frequency counter I need at least a diagram
> for, but I need 2 NL-950S Nixie tubes or EQ. Brad KB2CHY
>
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for losses or misrepresentations of any kind.  Buyer beware!

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