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Re: [TenTec] TenTec Digest, Vol 180, Issue 9

To: "tentec@contesting.com" <tentec@contesting.com>
Subject: Re: [TenTec] TenTec Digest, Vol 180, Issue 9
From: jack <jfriend31@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 11 Dec 2017 13:23:13 -0700
List-post: <mailto:tentec@contesting.com>
I have had trouble with O and O2 at times regarding the 1 Keying loop. The O2 
is now working as it should but the O will NOT key anything on loop 1 or 2. In 
fact it stops keying anything CW with either loop turned on.

O would not key at all with either loop turned off until I did a full reboot, 
VFOB-LCK turn on and then MAIN RX/TX turn on. Then antenna 2 would key with 
both loops off.

Then after a while I did the full reboot again and antenna 1 would key CW 
again. Still turning on keying loop 1 or 2 will immediately shut the TX on 
either Ant 1 or Ant 2 off. 

O2 seems to work fine now as I was in the 10M contest CW with loop 1 working 
fine and driving my ACOM 1000 to full power.

BUT, both O and O2 loose RX 2 along the way even after a full reboot. It is as 
if a self timer decides now is the time to shut down RX2. But the timer is not 
predictable. 

I took O apart and unplugged and replugged all internal connectors several 
times with contact cleaner applied. After a while the same thing as formerly 
happened restarts.

If Ten Tec or whoever owns Ten Tec does not soon announce an O3 or similar even 
a double Eagle (2 RX) I am going to find someone else who builds such a rig to 
supply me one.

Sending back to Ten Tec is EXPENSIVE, at least $100 each way! Add to that any 
sort of repair time/parts! Both O’s have been back to Ten Tec in TN, O twice 
and O2 once. No more.

The O series is my first choice, but reliability is absolutely necessary for me 
to keep them. There is no other brand/model on the market that appeals to me 
more than the Orion, but the above qualification makes the matter mute.

73 Jack AK7O
Original owner of Orion and second owner of Orion II.

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Sent: Monday, December 11, 2017 10:00 AM
To: tentec@contesting.com
Subject: TenTec Digest, Vol 180, Issue 9

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Today's Topics:

   1. Orion Keying Loop (Michael Marx)
   2. Re: receiver isolation (Kim Elmore)
   3. Re: Orion Keying Loop (Barry N1EU)


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Message: 1
Date: Sun, 10 Dec 2017 11:41:22 -0600
From: Michael Marx <sndtubes@vacuumtubes.com>
To: TenTec@contesting.com, TenTec@yahoogroups.com
Subject: [TenTec] Orion Keying Loop
Message-ID: <01FB98C3-CB49-47FC-A0B4-A416A3FB8621@vacuumtubes.com>
Content-Type: text/plain;       charset=utf-8

Hi Guys,

I have been dealing with a sick Centurion.  Still having problems.  I am going 
to rebuild the QSK board and try again.

However, when I was testing the Centurion with my Orion 1, I had keying loop 1 
connected and it was working?.for a short time.   Something happened when I was 
testing and suddenly the amp would no longer key.  I think the problem lies in 
the QSK board.  I?m sure something failed there again.

But, when the amp stopped keying, so did the radio.  If I have the keying loop 
turned on, the radio will not key at all.  If I turn the key loop off, the 
radio keys fine.  if I turn on keying loop #2, the radio keys fine.  So the 
radio keys fine except when I have key loop 1 turned on in the menu.  

So my question is, have I damaged keying loop #1?  If so, what do I need to do 
to fix it?

thanks for all of the expert advice!

73
Mike WB0SND

Michael Marx
sndtubes@vacuumtubes.com
636-939-9190

SND Tube Sales
105 N. Division St.
Bonne Terre, MO  63628






------------------------------

Message: 2
Date: Sun, 10 Dec 2017 12:37:15 -0600
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
To: tentec@contesting.com
Subject: Re: [TenTec] receiver isolation
Message-ID: <44ac8955-1aad-6fae-0983-5bc2ddf37f98@sbcglobal.net>
Content-Type: text/plain; charset=utf-8; format=flowed

I may need to implement something along the lines of what's been 
described in here for receiver isolation. While my DXEngineering 
Receiver Guard will protect the RX ANT port from monstrous RF inputs, 
when my K9AY loops are set to the direction of my TX antenna, I still 
get enough RF into the RX ant port to disrupt my Orion II when running 
1500 W. If I crank in 6 dB of RX attenuation, the problem is alleviated 
so I must be right on the ragged edge of "too much RF at the RX ANT 
port." I have a CMC on the RX feedline. If the loops are set to any 
other direction, the problem vanishes, so it's not getting in via common 
mode nor is it getting in via the control line. Since this is on the low 
bands only (80 m and 160 m) I barely notice 6 dB of RX attenuation, 
anyway, so that's the fix for now.

Kim N5OP

On 12/7/2017 8:34 PM, Dukes HiFi wrote:

I have been repairing an Icon IC-756 Pro 2. It is AMAZING what they went 
through to keep transmitted RF out of the receiver input.

They actually pick u[p on the TX 5 volt line and drive a transistor, which 
pulls a pair of series PIN diodes directly to ground (through a 0.1 uF 
capacitor). When this affair shorted out, the attenuation was over 90 dB!

It would be easy enough to do this for any radio with a separate receiver 
antenna input. The circuit only has about 8 parts.

Gary





------------------------------

Message: 3
Date: Sun, 10 Dec 2017 20:47:57 +0000
From: Barry N1EU <barry.n1eu@gmail.com>
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Orion Keying Loop
Message-ID:
        <CAFmfzDv2OXGEkWzXkdnW4upJcj5eMHad=31Ssnmm=BsDSr435A@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Are you saying keying loop #2 works with the amp connected to TX Out2/TX
En2?  If not, what is connected to those jacks?

73, Barry N1EU

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On Sun, Dec 10, 2017 at 5:41 PM, Michael Marx <sndtubes@vacuumtubes.com>
wrote:

> Hi Guys,
>
> I have been dealing with a sick Centurion.  Still having problems.  I am
> going to rebuild the QSK board and try again.
>
> However, when I was testing the Centurion with my Orion 1, I had keying
> loop 1 connected and it was working?.for a short time.   Something happened
> when I was testing and suddenly the amp would no longer key.  I think the
> problem lies in the QSK board.  I?m sure something failed there again.
>
> But, when the amp stopped keying, so did the radio.  If I have the keying
> loop turned on, the radio will not key at all.  If I turn the key loop off,
> the radio keys fine.  if I turn on keying loop #2, the radio keys fine.  So
> the radio keys fine except when I have key loop 1 turned on in the menu.
>
> So my question is, have I damaged keying loop #1?  If so, what do I need
> to do to fix it?
>
> thanks for all of the expert advice!
>
> 73
> Mike WB0SND
>
> Michael Marx
> sndtubes@vacuumtubes.com
> 636-939-9190
>
> SND Tube Sales
> 105 N. Division St.
> Bonne Terre, MO  63628
>
>
>
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>


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