[TenTec] Omni 7 shuts down on overcurrent on 10-12 meters only

[Wade Staggs]

I would guess that if your radio is designed even close to the way my old
Paragon is set up. You have one or more bad Diodes on the Band Pass Board.
The Band Pass Board selects various values of Inductance and Capacitance
that keep the Output of the Transmitter from outputting various harmonic
signals. This also has a lot to do with Matching the Final Stage to your 50
Ohm Load. If these various Coils and Capacitors are being Wrongly Selected,
then you are looking at Massive SWR and a really bad match ( maybe even a
short electronically ) to the Final Output Devices. Every time you change
bands, the Microprocessor will output a certain combination of voltages to
the Band Pass Board. If One or more of these diodes are shorted or open
..... Your radio will see a Massive Mismatch at the Finals. I would use the
Diode Check function or the R times one setting on an Analog meter to check
these diodes.
                                                                         73
and May God Bless de Wade/KJ4WS

On Tue, Sep 25, 2012 at 4:00 PM, denton <denton at oregontrail.net> wrote:

> I have an Omni 7 that shuts down due to over current into a flat
> load...regardless of power output setting on 12 and 10 meters only. All
> other bands behave themselves.
> If I even tap the mic it will shut down...
> Called TT about it over a year ago and they think it is either a diode or
> relay...hate to sent it in.
> Anyone else experience the same?
> Talked to another ham at the Spokane hamfest this last Saturday and he
> said he had the same problem, sent it to TT for fixing but can't recall
> just what they did.
> ------------------------------**--------------------
> From: "shristov" <shristov at ptt.rs>
> Sent: Tuesday, September 25, 2012 10:44 AM
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Subject: Re: [TenTec] Balancing Orion 565 VFO knobs
>
>
>> Michael Cheponis <Michael at Cheponis.Com> wrote:
>>
>>  I have a 566, and the knobs are perfectly balanced.
>>>
>>
>>
>> It's great to know that knobs on 566 do not drift by themselves.
>>
>> I managed today to balance both of my 565 VFO knobs.
>> It was easier than expected, took me 15 minutes per knob.
>>
>> Using an 8 mm slot drill, I cut out a ~2 mm deep hole,
>> on the bottom of the cast balancing hole,
>> just opposite of the fastening screw.
>>
>> Quantity of material removed was very similar on both knobs:
>> approximately 100 mm^3, which is ~0.27 g of aluminium.
>>
>> For the record:
>>  the knob itself is ~165 g
>>  skirt (made of metalized plastics) is ~8 g
>>  spring is ~1 g
>>  rubber is ~10 g
>>
>> I completely ignored the skirt and the rubber
>> as being much lighter than the main knob part.
>>
>> Now I can use a much lighter drag, similar to FT1000,
>> and VFO knobs are much more pleasant to use.
>>
>>
>> 73,
>>
>> Sinisa YT1NT, VE3EA
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