[TenTec] Omni V I Assistance Needed

[Dry Martini Holding Company😎]

Gary,

Thank you for the info on my Omni V. 

Robert 
KG4KGL 

> On Sep 29, 2018, at 20:00, Byron Cordes via TenTec <tentec at contesting.com> wrote:
> 
> I’ll have to pull filter ,good idea . Let you know  tomorrow . Thanks 
> 
> Sent from my iPad
> 
>> On Sep 29, 2018, at 6:21 PM, MadScientist <dukeshifi at comcast.net> wrote:
>> 
>> OK, I am involved in three threads regarding Paragons, Omni 5’s and Omni 6’s so I have gotten some crosstalk…
>> 
>> If you select a filter position on your radio that has no filter in it, do you still hear the clicking sound when tuning?
>> 
>> Gary
>> 
>>> On Sep 29, 2018, at 5:33 PM, Byron Cordes via TenTec <tentec at contesting.com> wrote:
>>> 
>>> The radio is a Omni VI.  Radio does rx and tx . can here and talk to people even on 20 meters where that vfo noise is . Higher noise floor on 40- 160 you don’t here the vfo noise but on 20 meters it is very loud higher than the people talking when tuning . Stop turning vfo and radio sounds normal with people talking .
>>> 
>>> Sent from my iPad
>>> 
>>>> On Sep 29, 2018, at 5:23 PM, MadScientist <dukeshifi at comcast.net> wrote:
>>>> 
>>>> Sorry, I misread… I was focussed on a previous radio (a Paragon).
>>>> 
>>>> Your problem is most certainly due to the fact that the 5.0 to 5.5 MHz PLL is going out of lock. This model does not produce any out-of-lock fault regardless of the lock condition of the PLL so it can be out-of-lock with no indication of that condition. The radio will still produce normal band hiss but you will not be able to tune in signals.
>>>> 
>>>> Oddly, he radio will still transmit in this condition, but well out of the Ham bands! It will transmit on the frequency at which the VCO settles when out-of lock, about 14.6 MHz, regardless of dial setting or display readout reading. It will also be very unstable.
>>>> 
>>>> From what you describe (now that I am on the right page model-wise) i would suggest replacing the dual gate MOSFET in the loop IF. 
>>>> 
>>>> I recently repaired an Omni 6 that had the same problem as your Omni 5 has. That FET was the culprit and what’s worse, it pulled the alignment due to leakage of the device. It was highly intermittent. The heat/cool method was the only way I could point to it, but monitoring the loop test point was the only way I could prove it to myself.
>>>> 
>>>> The way to really determine if this is the fault is to put a voltmeter on the 10K resistor test point of the loop IF (That