Tom,
How about this:
Connect the TS-480SAT's first pigtail to the TW1's "radio" connector using
one jumper.
Connect the TW1's "antenna" connector to the external tuner's "radio"
connector using one jumper.
Connect the external tuner's "antenna" connector to one of the selectable
connectors on a CoAx switch using one jumper.
Connect the TS-480SAT's second pigtail to another one of the selectable
connectors on a CoAx switch using one jumper.
Connect the antenna feed line to the "common" connector on the CoAx switch.
Then, whenever you want to change from using the external tuner to using the
internal tuner, you manually switch the CoAx switch and make the TS-480SAT
select the appropriate pigtail. You also need to make the TS-480SAT select
or deselect the internal tuner as appropriate.
Caution: Don't confuse which way the CoAx switch is set whenever
transmitting!
btw, I told you it would be messy. ;)
hth
Bob KD8IXD
----- Original Message -----
From: "T Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, October 03, 2008 6:56 PM
Subject: Re: using TW1 correctly with TW1
Yeah, I guess you're right, Bob.
You know what, though?
I just thought of something, which I'd like some more feedback on from other
TS480 users out there:
I wonder if I could use one of the antenna ports on the TS480 for the
auto-tuner, and the other for the outboard tuner?
That would mean the only thing I'd have to do is physically switch
connections between the two pigtails, depending on whether I'm using the
internal auto-tuner, or my outboard MFJ external tuner?
If this is incorrect, please don't laugh at me, guys. ... It's getting late,
and the mind is going fast here.
73 from Tom Behler: KB8TYJ
----- Original Message -----
From: "Bob J." <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, October 04, 2008 12:29 AM
Subject: Re: using TW1 correctly with TW1
> Tom,
>
> You made two important observations:
>
> 1. "...the MFJ 901B that I have has no bby-pass on it..."
>
> therefore
>
> 2. "...if I use the auto-tuner in the TS480, I'd have to disconnect the
> outboard tuner..."
>
> Think about it: If your external tuner has no bypass capability, how
> could
> the
>
> "...circuit for the out-board tuner is somehow bypassed in the TS480 when
> using the internal auto-tuner."
>
> I can imagine a way to rig up an external bypass by using several jumpers
> and a couple of CoAx switches but I suspect that would introduce
> unnecessary
> losses not to mention being pretty messy.
>
> hth
>
> Bob KD8IXD
>
>
> ----- Original Message -----
> From: "T Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, October 03, 2008 4:16 PM
> Subject: Re: using TW1 correctly with TW1
>
>
> John:
>
> I need to be sure I'm understanding you correctly here:
>
> When using the external tuner, are you saying you go from radio, to TW1,
> to
> tuner, to antenna?
>
> I would have thought it'd be the other way around:
>
> from radio, to tuner, to TW1, to antenna.
>
> Help me out with an explanation.
>
> Also, the MFJ 901B that I have has no bby-pass on it, so I'm assuming then
> that if I use the auto-tuner in the TS480, I'd have to disconnect the
> outboard tuner, unless the circuit for the out-board tuner is somehow
> bypassed in the TS480 when using the internal auto-tuner.
>
> Anyone else with thoughts on these issues?
>
> 73 from Tom behler: KB8TYJ
>
>
> I would have thought you
> ----- Original Message -----
> From: "John Miller" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, October 03, 2008 7:51 AM
> Subject: Re: using TW1 correctly with TW1
>
>
>> put the meter between the tuner and the radio. Bypass the radio tuner to
>> use
>> the external one, and if you use the internal one in the radio, you have
>> to
>> either put the external tuner in the bypass position if it's like mine
>> and
>> has one, or disconnect it. Most tuners have a way to bypass it though, I
>> know my MFJ 941C does.
>> ----- Original Message -----
>> From: "T Behler" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, October 03, 2008 6:53 AM
>> Subject: using TW1 correctly with TW1
>>
>>
>>> Hi, again, folks.
>>>
>>> Just a few more questions here, this time when using the TW1 with the
>>> TS480
>>> and an outboard tuner:
>>>
>>> The out-board tuner I have is one of the older MFJ 901B versatuners.
>>>
>>> 1. I assume that you connect the outboard tuner to the rig, and then go
>>> from the tuner to the TW1. Is that correct?
>>>
>>> 2. When using the outboard tuner, I would assume you'd want to be very
>>> sure
>>> to turn off the auto-tuner in the TS480, correct?
>>>
>>> and
>>>
>>> 3. When using the auto-tuner in the Ts480, would I have to disconnect
>>> the
>>> outboard tuner, or is that automatically bypassed when I switch the
>>> TS480's
>>> internal auto-tuner on?
>>>
>>> Thanks as always, guys; I appreciate your patience with all of my
>>> questions.
>>>
>>> 73 from Tom Behler: KB8TYJ
>>
>
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