Nope the testing was done as follows:
Applied 120 VAC to the secondary. Then check with AC VOLTMETER on the
primaries. One showed 3.65 v and the other showed zero.
The good primary reads 0.5 ohms and the bad one reads 0.1 ohms.
Shorted primary us a common failure mode for these TenTec transformers. Gary
WZ1M has rewound 7 from Centurions in the past 2 years.
Best regards - Bry Carling
> On Feb 2, 2014, at 1:54 PM, "Bob McGraw - K4TAX" <RMcGraw@Blomand.net> wrote:
>
> Good point Jim. I missed that. In that case likely the fault would be the
> bias control on the Bias/QSK board.
>
> Without doing a magnetization test, as the primaries will show a very low DC
> resistance, a primary short would be difficult to determine. Of course if
> the primary is shorted to the frame, a DC measurement would show this.
>
> Sounds like further and detail trouble shooting might be in order.
>
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message ----- From: "Jim Brown" <k9yc@audiosystemsgroup.com>
> To: <tentec@contesting.com>
> Sent: Sunday, February 02, 2014 12:44 PM
> Subject: Re: [TenTec] 422 Centurion blowing fuses...
>
>
>>> On 2/2/2014 10:13 AM, Bob McGraw - K4TAX wrote:
>>> He said one of the primary windings in shorted.
>>
>> Something about this does not compute. The original post said that he didn't
>> blow fuses until he went from standby to operate. If the transformer were
>> shorted, I'd expect a fuse to blow with first power applied to the
>> transformer.
>>
>> 73, Jim K9YC
>> _______________________________________________
>> TenTec mailing list
>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>
>
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