[TenTec] Using Aux power and "spare" functions on Argosy 525

[Stephen Roberts]

Wow...thank you SO much for your response and I hope to get to this today. I'll let you know what I find.

Regards,

Steve
KB1WUD


On Apr 5, 2012, at 5:00 PM, Rick - DJ0IP / NJ0IP wrote:

> Steve, don't place too much weight on the answer anyone of us gives you.
> We may all be wrong.
> 
> All answers will be based on a "stock radio", but my experience over the
> years is, these radios often have been modified. You have to get in there
> and trace the wires going to these jacks in order to know just exactly what
> you have.
> 
> The two RCA phono jacks marked +13v "were" originally wired to the 13v.
> If you follow the schematic (on the first page in the downloaded handbook),
> you will see that the two jacks should be wired together and then have a
> single wire running to the Control Board 80781.
> 
> ON THAT BOARD.....there is a little 10A glass fuse.  Check to see if it is
> blown or good.  Surely it is not blown, because this board generates the T
> and R voltages, and the radio would not work if these were not working
> correctly.
> 
> HOWEVER, THERE IS A SMALL INDUCTOR, "L1", and if this inductor is burned
> out, you will not have 13 volts to the back panel jacks, but you will still
> have 13v to the circuits creating the T and R voltage.  That might be the
> culprit.  IF it is blown, it may be blown because its neighbor, C6 shorted
> out.
> 
> With POWER OFF, do the following:
> 
> - with a volt meter, measure the voltage at the junction of L1 and C6.  (C6
> is a 1000 MF, 16v electrolyt).  Be absolutely sure there is no DC voltage at
> that junction.  If there is voltage on it (which will rapidly deplete with
> the meter across it, then there must also be 13v available for the back
> panel jacks. 
> 
> -then switch to Ohms measurements and measure across L1.  It should read
> zero ohms. 
> 
> - Next, place the Ohms meter in x100 scale and measure across C6 (to
> ground).  Then reverse the leads and measure across C6 again.  In one of the
> directions the meter should briefly jump up, and then slowly fall back off.
> IF IT MEASURES ZERO OHMS (or close), it is shorted out and probably the
> reason it blew L1.
> 
> If you don't have 13v on the back panel, but the wire going to the control
> board is still in place, then the problem is going to be in the 3 things I
> described above, fuse, L1, or C6.
> 
> GL and have fun!
> 
> 73
> Rick, DJ0IP
> 
> 
> 
> -----Original Message-----
> From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
> On Behalf Of Stephen Roberts
> Sent: Thursday, April 05, 2012 9:51 PM
> To: Discussion of Ten-Tec Equipment
> Subject: [TenTec] Using Aux power and "spare" functions on Argosy 525
> 
> Ok, call me stupid but I'm new to all of this. I have an Argosy 525 and I
> want to run some other stuff from the 12V out on the back of the rig, but
> when I put a meter on it, it doesn't show any voltage. The Tech manual
> wasn't much use either. Ideally I'd like to have Powerpole connectors in the
> back of the rig so I can plug other stuff into it like my audio SCAF filter,
> antenna tuner, etc. I'm also wondering what the "spare" RCA jacks are for.
> 
> 73
> Steve
> KB1WUD
> 
> 
> 
> 
> 
> 
> 
> 
> 
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-----------------------------------------------
Steve Roberts
(802) 779-7489