[ARC5] Rollerductor setting

[Dennis Monticelli]

Yes, there will be a series resonance with the variable capacitor.  Sure,
just set the rollerductor first and then adjust the capacitor.  If that
combo doesn't give you the loading you desire, try adjusting the
rollerductor differently.

Dennis AE6C

On Wed, Apr 19, 2017 at 10:11 PM, AKLDGUY . <neilb0627 at gmail.com> wrote:

> Hi Dennis
>
> OK, so the rollerductor and the 150pF series cap interact? Is that it?
>
> So I should set the rollerductor arbitrarily to more than half the
> inductance and adjust the cap to suit?
>
> I like your harmonic reduction comment. It makes sense.
>
> 73 de Neil ZL1ANM
>
>
> On Thu, Apr 20, 2017 at 4:10 PM, Dennis Monticelli <
> dennis.monticelli at gmail.com> wrote:
>
>> Neil,
>>
>> Whether 80M or 40M, I like to adjust for at least half the rollerductor.
>> Too little inductance will compromise harmonic attenuation.
>>
>> Dennis AE6C
>>
>> On Wed, Apr 19, 2017 at 7:12 PM, AKLDGUY . <neilb0627 at gmail.com> wrote:
>>
>>> To match my T-19/ARC-5 (3-4 Mc/s) to 50 ohm coax, I'll be using a 150pF
>>> variable capacitor connected in series with the inner of the coax.
>>>
>>> This configuration worked very well with my BC-AO-230 with the cap at
>>> about half-mesh.
>>>
>>> What setting should I use for the ANT. INDUCTANCE?
>>> Frequency is 3.850 MHz for the ZL AM net.
>>>
>>> 73 de Neil ZL1ANM
>>>
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>>
>
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