[ARC5] ARC-5 on 20 meters

[Dennis Monticelli]

You should not need PA neutralization in doubling service.

However, one still has to pay attention to stray 14 Mc energy getting into
the 7Mc osc circuitry because interactions could still occur.  Given the
layout of the ARC-5 I would not expect that to be a problem unless it
sneaks in via some other "unauthorized" mods.

Dennis AE6C

On Fri, Dec 30, 2016 at 2:02 AM, Jim Wiley <jwiley at gci.net> wrote:

> Well, it's been the better part of 60 years since I fooled with an ARC-5
> rig, but I think if you are running it as a doubler, neutralization is not
> needed.   Could be wrong here, and if so I am confident someone will step
> in to correct me.
>
> - Jim, KL7CC
>
>
>
> On 12/30/2016 12:37 AM, Brian wrote:
>
>> Any suggestion for neutralisation of the finals?
>> 73 de Brian, VK2GCE.
>>
>> On Friday, December 30, 2016 12:56 PM , Bill said:
>>
>>  A better way to make the output a doubler is to loose the neutralization
>> capacitor and operate the grids of the 1625's in push pull but retain
>> the parallel plates. You then have a class-c push-push doubler. The
>> fundamental and third harmonic will cancel out and you will also have
>> better efficiency.
>>  73 Bill wa4lav
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