Dave,
You are confirming what I thought....that the switch might be the source
of the problem. Actually, I checked it after pressing both top and
bottom of the switch. next is taking the top off the PS and going to
work. I had been using the the Omni but running off my switcher that I
use as a station supply, so I never before had checked the 280, my bad.
Of course when I loaned the Omni and supply to a friend nothing worked.
Switches seem to be the bain of my existence. I have one of those power
distribution strips (like MFJ but labeled Tenma.) Worked fine for a
long time but it appears that I loose continuity through the low power
side when I get up around 8-10 amps there. I will check them both out
and jump into the Mouser/MCM catalog to see what is available in a
lighted switch, if that is the problem in them both.
John Graves
WA1JG
jh.graves@verizon.net
On 3/9/2011 10:10 AM, d.e.warnick@comcast.net wrote:
>
>
> I'd bet on the PS switch being open (is it turned on?)
>
>
>
> If you have no voltage on the 2 white wires with the PS plugged in and the
> switch on, look at the primary circuit.
>
>
>
> One white wire is connected to the AC line through the fuse. Check continuity
> there
>
> The other white witre connects through the PS Switch and the primaries of the
> transformer. Check continuity there.
>
>
>
> Check the PS switch for continuity
>
> Check the fuse& fuse holder combination for continuity
>
> Check the transformer primaries for continuity and correct 120v/240v
> connection
>
> Check the power cord for continuity
>
>
>
> ALL CONTINUITY CHECKS WITH THE PS UNPLUGGED, OF COURSE
>
>
>
> 73
>
> Dave
>
> WA3F
>
> ----- Original Message -----
> From: "John Graves"<jh.graves@verizon.net>
> To: "Discussion of Ten-Tec Equipment"<tentec@contesting.com>
> Sent: Wednesday, March 9, 2011 9:55:08 AM
> Subject: [TenTec] Dead TT 280 PS
>
> I loaned out my Omni-D and 280 supply but it appears that the PS is not
> working. The meter light does not come on. I checked the voltage on the
> 2 white center wires on the connector and found no voltage. The
> external fuse checks good. Any suggestions on where to go next? I do
> have a copy of the manual with the 280 schematic so that helps.
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