Steve/Gary,
10 & 12 share a pair of relays and 15 & 17 share a pair. So I agree with Gary,
one failed relay would not cause you to lose 12 and 15.
Here's a link to the manual if you need it. The Low Pass Filter board schematic
is on page 4-3.
https://www.google.com/search?q=omni+6+low+pass+filter+board+schematic&oq=omni+6+low+pass+filter+board+schematic&aqs=chrome..69i57j33.57253j1j7&client=ms-android-att-us&sourceid=chrome-mobile&ie=UTF-8
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-----Original Message-----
From: MadScientist1948 <dukeshifi@comcast.net>
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Sent: Mon, Apr 23, 2018 10:32 AM
Subject: [TenTec] Fwd: Omni 6 pwr problem
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 <<a
>> href="mailto:steve@nr4m.com";>steve@nr4m.com</a>> 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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>
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