Looking closer at the drawing (with spectacles on) it appears there are two
wires connecting to the switch on the back of the ALC pot/NB switch
assembly. Connecting to the switch at the rear of the assembly are a blue
and a red wire. It is to that red wire one connects his new resistor,
according to the diagram. I would assume this is the same place from where
the old resistor was removed, but mine is long since gone.
73, Mike N4NT
----- Original Message -----
From: "Mike Hyder -N4NT-" <N4NT@chartertn.net>
To: <k4cl@arrl.net>; "Ten-Tec Reflector" <tentec@contesting.com>
Sent: Saturday, June 01, 2002 9:31 PM
Subject: Fw: Ten-Tec Omni-D S-Meter Bulb
> Hi again, Larry--
>
> I just dug through my Omni folder and found a Ten-Tec modification for the
> Omni meter lamp.
>
> The modification sheet came with two parts, a 1892 bayonet base bulb (14.4
> volt - 0.12 amp) and a 10 ohm, 1/2 watt resistor.
>
> Here are the modification steps:
> 1. Remove CM47 Bulb.
> 2. Cut out resistor on base of bulb.
> 3. Install new bulb (1892).
> 4. Install 10 ohm resistor as shown. (Diagram shows the new resistor
> connecting from the red wire on the Mic/Blanker pot down to the lug on the
> lamp.) In the circuitry, the lamp and the resistor wind up being in
series
> and across the 12 volt line. This is where I used the 33 ohm resistor
> instead of the 10 ohm that Ten-Tec supplied, and I've never lost a lamp
> since!
>
> I'm sending a copy of this to the Ten-Tec reflector in hopes that it helps
> someone.
>
> 73, Mike N4NT
>
> ----- Original Message -----
> From: "Mike Hyder -N4NT-" <N4NT@chartertn.net>
> To: "Larry Belcher" <k4cl@arrl.net>
> Sent: Saturday, June 01, 2002 9:13 PM
> Subject: Re: Ten-Tec Omni-D S-Meter Bulb
>
>
> > Hi, Larry--
> >
> > The type 47 lamp in the Omni's meter lighting has a 180 ohm resistor in
> > series with it in the schematic of the rig. What I did was to put a 33
> ohm,
> > 1 watt resistor in series with the bulb, right at the bulb. The 1 watt
> may
> > have been overkill but that's what I had on hand. A 27 ohm resistor
would
> > work about as well. I tried a 100 ohm resistor but it made the bulb
> really
> > dim.
> >
> > Just above the dial skirt is a pointer that is illuminated with a 'grain
> of
> > wheat' bulb. Changing that bulb requires removing the front panel and
> then
> > removing the escutcheon from it. Because this is such a bother, I put a
> 100
> > ohm resistor in series with that bulb. For this bulb, the 100 resistor
> > works just fine. The resistor for that one MUST be installed behind the
> > escutcheon, as I recall, because the 12V that is supplied to the front
> panel
> > is also needed for the two LED's. That is not something I'd do unless I
> had
> > to be in there for some other reason (like rebuilding the PTO). Be
> advised
> > that there is a 3-pin plug that is used to connect the front panel to
the
> > chassis of the radio, so take the panel off gingerly.
> >
> > Hope this helps. Please let me know your results.
> >
> > 73, Mike N4NT
> >
> > ----- Original Message -----
> > From: "Larry Belcher" <k4cl@arrl.net>
> > To: <n4nt@chartertn.net>
> > Sent: Saturday, June 01, 2002 8:02 PM
> > Subject: Ten-Tec Omni-D S-Meter Bulb
> >
> >
> > > Hi Mike,
> > >
> > > Hope this finds you and yours doing well and enjoying the hot and dry
> > > weather. I need to rack your brain for a minute. I seem to remember a
> > > couple of messages about the S-meter bulb for the Omni-D on the
Ten-Tec
> > > reflector but I have searched the archives to no avail. You might
have
> > > written one of them and if not you might remember or have knowledge of
> > what
> > > I am looking for. Manual calls for a standard 6 volt No. 47 but that
is
> > > pretty bright plus I seem to loose them pretty regular. Was there a
> mod,
> > > resistor change, or something that I seem to remember?
> > >
> > > Any ideas greatly appreciated Mike.
> > >
> > > 73,
> > >
> > > Larry, K4CL
> >
>
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