[TenTec] Fwd: Re: Fwd: Omni 6 pwr problem

[Steve Bookout]

Checking was not too easy here as I have mono band stations, with band 
specific high power band pass filters for my contesting efforts.  Trying 
15 out was not an issue.  I just connected to the 15 meter port on my 
patch panel and all was good.  But, I have no way to try any WARC bands 
out on real antennas, even just listening.  I wound up just using a long 
piece of coax with the connected shield NOT connected at the watt 
meter.  On all bands I could hear substantial 'band noise', except for 
15 meters and 12 meters, where it was graveyard dead.

So, no transmit or receive on 12 meters or 15 meters.

Steve

On 4/23/2018 10:31 AM, MadScientist1948 wrote:
>
> You are correct about the thread regarding the various switching 
> relays. They do fail causing lack of output. The fix is simply one of 
> locating the defective one as there are several or each band.
>
> Of course the other problem is locating good replacements…
>
> I have a few dozen if you find that you need them. They are mostly of 
> the newer type as seen in the Orions.
>
> I assume your receiver performance is fine on these two bands?
>
> The reason I ask is your description the problem, stating that both 12 
> and 15 are malfunctioning. This is suspicious.
>
> The Omni VI shares a set of tuned circuits on the local 
> oscillator/mixer board for 12 meters and 15 meters. Thus, a failure in 
> that bandpass filter (located between and including D43 and D36 on the 
> diagram for that board) will cause you to lose both bands on TX and RX 
> on 12 and 15.
>
> The most frequent reason for this failure is a marginal solder 
> connection in that region of the board, not an uncommon thing for Ten 
> Tec. The fix is to simply resolder all the connections on the filter 
> for those two bands.
>>
> Gary
>
> W0DVN
>>
>>> On Apr 23, 2018, at 7:48 AM, Steve Bookout <steve at nr4m.com> wrote:
>>>
>>> Hello all,
>>>
>>> I have very low/no power output on 12m and 15m. Fine on other bands.
>>>
>>> 'Somewhere' at 'sometime' I remember 'something' about relays on the 
>>> output filter board being a possible cause.
>>>
>>> 'Someone' please refresh my memory on this. Or, maybe I 'somehow' 
>>> imagined this; maybe in a thread I really wasn't following.
>>>
>>> 73 de Steve, NR4M
>>>
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