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Re: [TenTec] Proper TenTec 960 power Supply Schematic

To: tentec@contesting.com
Subject: Re: [TenTec] Proper TenTec 960 power Supply Schematic
From: Radio AI2Q <ai2q@roadrunner.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Fri, 4 Jun 2021 09:04:47 -0400
List-post: <mailto:tentec@contesting.com>
Make that a VOM, not a COM. Sorry for the typo.

== Vy 73, /AI2Q/, Alex


On 6/4/2021 8:59 AM, Radio AI2Q wrote:
Hi DJ,

I suggest you use your ohmmeter (preferably a COM)  to check the junctions of the bipolar transistors in the regulator circuit. Check devices from base to collector and base to emitter. Your readings should be low forward and high in reverse. You'll need to use a meter that provides a volt or so on its test leads in the ohmmeter position. Check from emitter to collectors, too. That should reveal any shorts. If likely good your readings should be high both ways. Do the same tests on the diodes, even the Zener diodes.

Needless to say, be sure the supply is off and the filter caps are discharged before making these tests.

Vy 73, /AI2Q/, Alex


On 6/4/2021 12:18 AM, DJ wrote:
Hi All

Could some one let me know if there is a proper schematic for my TenTec 960 power supply;y ,none I have are proper in terms of parts.

Problem is that  I turn on supply , I can Adjust to proper voltage, but when I put any load on the supply like 1 to 18 amps amp it, the voltage goes to zero volts.

Take load of it is ok with proper voltage , have two supplies with same problem.

Sure could use some help on this.

Checked all the parts ,have replaced parts , 723 on all, my brain is gone .

Thank you for the read

DJ. K6RCL. Goleta, Calif.
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