MISTAKE:
I'm sorry Steve, I can't tell my left from my right anymore.
Good thing my old drill sergeant wasn't watching!
Here is the corrected text:
If you are looking at the Control Board (80781) as shown on page "39-525" of
the manual, and position it such that you are looking at it with the fuse in
the middle at the bottom, you will see C6 immediately to the left of the
bottom of the fuse and I think L1 is immediately to the >>> LEFT <<< of
the top of the fuse. It is a bit blurry in the scanned copy of the manual.
What you can also do is simply measure from the top of the fust to the
positive terminal of C6.
In the picture you clearly see C6 with a black dot marking its minus side
(which is towards the bottom of the board in the picture). So measure from
the top connection of C6 to the top of the fuse. This is the same as
measuring across L1.
Hope you read this corrected version before you begin searching!
73
Rick, DJ0IP
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Rick - DJ0IP / NJ0IP
Sent: Saturday, April 07, 2012 4:44 PM
To: 'Discussion of Ten-Tec Equipment'
Subject: Re: [TenTec] Using Aux power and "spare" functions on Argosy 525
Steve,
If you are looking at the Control Board (80781) as shown on page "39-525" of
the manual, and position it such that you are looking at it with the fuse in
the middle at the bottom, you will see C6 immediately to the left of the
bottom of the fuse and I think L1 is immediately to the right of the top of
the fuse. It is a bit blurry in the scanned copy of the manual.
What you can also do is simply measure from the top of the fust to the
positive terminal of C6.
In the picture you clearly see C6 with a black dot marking its minus side
(which is towards the bottom of the board in the picture). So measure from
the top connection of C6 to the top of the fuse. This is the same as
measuring across L1.
Gud Luk.
Rick, DJ0IP
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Stephen Roberts
Sent: Saturday, April 07, 2012 3:13 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Using Aux power and "spare" functions on Argosy 525
I can't find L1.
Steve Roberts
Steverob@shoreham.met
802.779.7489
Sent from my iPhone
On Apr 5, 2012, at 5:00 PM, "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de> 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@contesting.com
> [mailto:tentec-bounces@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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