Richard,
I think most guys running serious power on 6 meters use something
better than a J-pole, but we all do what we have to do.
For what it's worth: I only run 100 watts from a 590 to a Hex beam that
needs no tuner at the low end of the 6 meter band. I have found that I
need to disconnect the interface cable from the radio to the 998 tuner
when on 6 meters. Otherwise the low swr spot is in the middle of the
band, whether the tuner is in bypass or even turned off.
I understand what you are trying to do in getting the amp's output to
the 6 meter antenna through the 998 in bypass mode. My experience
above may be peculiar to my setup, but I would check with MFJ before
putting a KW through the tuner in bypass mode on 6 meters, no matter
what antenna you are using.
Don't know how much 6 meterQRO stuff you really do, and if undoing a few
cables each time you work 6 is a deal breaker. Perhaps with some coax
jumpers and switches, you could simplify the changeover. What's a few
more bucks?
73,hope to hear you on the air sometime, Steve KW3A
On 1/5/2016 2:04 PM, Richard B. McDonald wrote:
> For the benefit of the List, I am reporting on my results on this topic. My
> initial presumption was correct, and advice I got here was indeed correct
> (verifying my presumption). I tested all this, and below is how this all in
> fact works.
>
> If you have an external tuner connected to ANT1 and assuming you use an
> interface cable for it, then the internal tuner is disabled for ANT1 only.
> This does not disable the internal tuner relative to ANT2. If you are on
> ANT1 and press the "AT" button, then your external tuner is engaged. On the
> other hand, if you are on ANT2 and then press the "AT" button, then the
> internal tuner engages.
>
> My particular problem is that I have a power amplifier (Ameritron ALS-1306)
> and an external tuner (MFJ-998) on the TS-2000's ANT1 jack. Using the 998's
> (not the TS-2000's Ant 1 and Ant 2 jacks, I wanted to have amplified power
> running to two separate antennas; one of which is a 6M J-Pole. However,
> because the SWR is too high on the J-Pole and because the 998 cannot tune
> 6M, I cannot do this. I would blow-up my amp due to the J-Pole's high SWR.
>
> The solution, for now, is just to have the J-Pole on the TS-2000's ANT2
> jack. As such, I can utilize the TS-2000's internal tuner to deal with the
> high SWR. Of course, this means that I am running bear foot using only the
> TS-2000's 100W. Until I somehow resolve the J-Pole's high SWR, I cannot
> connect it to the 998's Ant 2 jack and thus utilize the amp on it.
>
> 73,
> Richard KK6MRH/AG
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Richard B. McDonald
> Sent: Monday, January 04, 2016 4:31 PM
> To: [log in to unmask]
> Subject: Re: Using Both an External and the Internal Antenna Tuners on the
> Kenwood TS-2000
>
> Hi Steve!
>
> You zeroed-in right on my problem. For my 6M J-pole (ANT2), I have a 4:1
> SWR at the range 50 - 51 MHZ, 3:1 51 - 52 MHZ, and less than 2:1 52 - 54
> MHZ. So, I cannot run power from the amplifier to the 6M J-pole until I
> somehow deal with its SWR, nor can I use the 998 to tune it. The "somehow"
> is really bumming me out and frustrating me because I *really* want to put
> like a kilowatt into the 6M J-pole : (
>
> 73,
> Richard KK6MRH/AG
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Steve Forst
> Sent: Monday, January 04, 2016 4:04 PM
> To: [log in to unmask]
> Subject: Re: Using Both an External and the Internal Antenna Tuners on the
> Kenwood TS-2000
>
> Richard,
> The setup you describe is correct. As long as you have the interface
> cable plugged into the back of the radio, the internal tuner is disabled on
> ant 1.
>
> On another note, the amp will do 6 meters, but the998 tuner won't. I don't
> know how much 6 meter stuff you do, but if you want to run the amp on 6
> (assuming your antenna can handle it) you may have to juggle some things.
>
> 73, Steve KW3A
>
> On 1/4/2016 6:41 PM, Richard B. McDonald wrote:
>> Hi!
>>
>> Below under the "***" are copied the relevant sections of the
>> TS-2000's manual. Essentially, I have an external MFJ-998 auto tuner
>> connected to an amplifier (Ameritron ALS-1306), which then connects to
>> ANT1. On ANT2, I have a 6M J-pole, which does not run through the
>> amplifier. Is my understanding of the below correct that1) if I am on
>> ANT1 pressing the AT button on the TS-2000 engages the MFJ-998 auto
>> tuner relative to the antenna connected to ANT1, and 2) if I am on
>> ANT2 pressing the AT button engages the TS-2000's internal antenna
>> tuner relative to whatever antenna is connected to ANT2 (my 6M J-pole?
>>
>> 73,
>>
>> Richard KK6MRH/AG
>>
>> * * *
>>
>> Page 72 - [INTERNAL] AUTOMATIC ANTENNA TUNER: 2.Press [FUNC],
>> [AT/ANT1/2] to select ANT 1 or ANT 2. If an external tuner is
>> connected to the ANT 1 connector, select ANT 2 to use the internal
>> antenna tuner. The internal antenna tuner is automatically bypassed if
>> an external antenna tuner is connected to ANT 1.
>>
>> Page 94 - [EXTERNAL] ANTENNA TUNER: Use the ANT 1 and AT [auto tuner
>> control connection] connectors to connect an external antenna tuner.
>> If you connect the external tuner to the ANT 2 connector, the external
>> tuner will not function [by using the rig's tuner control, AT button].
>
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