[SignalOne] CX-11A help help help

[Jerry email]

Well guys I have owned several CX-7As, a CX-11A and even the MilSpec1030 and loved them all.  But I decided to thin out a few years ago and sold them all.  Well about 2 months ago a CX-11A came available and I could not resist.  It had a few problems and I have all of them fixed except for the following one.   On CW when I try to use the semi/delayed breakin mode the radio sends a constant carrier when any delay is cranked in.  Maybe the following will help explain the problem:

Referring to the TX Control row of push buttons on the front panel. 
 
 PTT . If PTT is engaged, the radio works great in full break-in.  All is well and it sounds great on another receiver.

VOX . This is where the problem exists.  When in this control mode, keying the radio results in a constant carrier output.  The sidetone works correctly with keying making you think all is well but when listening in another receiver the radio is sending a solid carrier .  It might be modulating the carrier with CW but it is very hard to tell listening in another receiver.  

Tune  .  this works fine.  The radio keys up and I can adjust the power from 0 watts output to 150 watts output.  All is well 

Transmit . The radio goes into the transmit mode and cw keys fine as it should.  All is well here too.  It sounds great on an outboard receiver.

It appears to be related to the VOX circuit and the delay.  When the VOX engages  with delay cranked in, the radio sends a carrier.   I am thinking the Audio Board (A6) where the vox delay stuff resides.   I also think it is the RT / TR line voltages giving me trouble when I try to use the vox semi-breakin.  If I put the radio in Transmit Mode (with front panel push button) and key the radio,  The RT and TR voltages rest at 0.2v (RT) and -15v (TR) when no dash or dot is being sent and then switch to -15v (RT) and -0.2v(TR) when a dot or dash is sent.  I think this is how it should work.   But when I push the VOX button and transmit with delay cranked in (delayed breakin), the TR/RT lines are a constant -0.2v (TR) and -15v (RT).  they do not key with the dots and dashes.  I am sure this confused everyone...right?  Any help would be appreciated a whole lot !!!   

By the way, the CX-11A documentation sure leaves a lot to be desired.   I have yet to find a set of schematics that agree and there is absolutely no write-up with a technical description.

Jerry  K8RA   ( www.k8ra.com )