[Amps] Recommended Tuner for Clipperton L

[Roger (K8RI)]

On 2/2/2014 4:51 PM, qrv at kd4e.com wrote:
> Roger,
>
>      That's why I'm looking only at non-roller/rotary inductor
> tuners - to remove the mechanical movement variable and the concern
> about an under-rated device in an affordable tuner.
>
>      Don't both the Dentron MT-2000 and MT-3000 tuners use only
> tapped coils?

Yes, both use tapped coils.  It's still pretty small wire for low 
impedance and a KW, but you don'y have to worry about the roller and 
oxidation.

I had several MT 3000s when the first came out, but have little 
recollection of how they worked on 160. We were limited to low power on 
the bottom 25 KHz of the band and that was quite a few years ago. 
Probably close to 40.

73 and good luck,

Roger (K8RI)

> David
>
>> If the antenna in highly reactive (inductive) and the SWR is high the
>>  voltage goes high. Neither the MFJs or Dentrons had a high enough
>> voltage rating for much over what I'd get when the 160 antenna was
>> resonant near the DX window and I'd go to the top of the band.
>>
>> Moving the resonant point to the middle, or upper end of the band
>> would eliminate the arcing at 1 KW, but then I had concerns about the
>> small wire on the rotary inductor when operating at the bottom end of
>> the band.
>>
>> They really needed a higher voltage rating on a larger cap and a
>> larger size wire on the rotary inductor for current on low
>> impedances.
>>
>> 73
>>
>> Roger (K8RI)
>
>
>


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