[TenTec] TenTec Digest, Vol 180, Issue 9

Michael Marx sndtubes at vacuumtubes.com
Mon Dec 11 17:50:08 EST 2017


I am saying the radio will key if key loop 2 is turned on or off.   key loop 1 will not key the radio if key loop 1 is turned on.  If it is off, the radio will key. 

This is with nothing connected to the key loop jacks.  

With the radio alone, it will not key at all with key loop 1 turned on.  

I realize the older radios need a shorting bar between TXout and TXen.  

But, is this the case with the Orion?  If so, why does it work when key 2 is activated?  

I am afraid to put a jumper on key loop 1 until I know it’s ok.


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 at vacuumtubes.com <mailto:sndtubes at vacuumtubes.com>>

> 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

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