[ARC5] Backwave

[Ian Wilson]

The amount of radiated RF (with the PA stage turned firmly off) should be
very small - especially since the ARC-5 TX 1625 stages are neutralized.

73, ian K3IMW

On Sun, Oct 25, 2015 at 7:07 PM, Bill Cromwell <wrcromwell at gmail.com> wrote:

> Hi,
>
> My own thoughts on moving the VFO off from your operating frequency is
> that you would be moving onto somebody else's frequency and causing QRM. If
> it's enough of a problem that somebody else complained about your backwave
> then it's serious enough to not push it onto yet somebody else.
>
> I like (and use) grid blocking. It can be managed by transistors - easily
> done and easily reversed to restore museum quality.
>
> 73,
>
> Bill  KU8H
>
>
>
> On 10/25/2015 09:40 PM, J Mcvey via ARC5 wrote:
>
>> Well I had no idea what a backwave was, so I had to look it up. There
>> isn't much out there either!
>> Anyway, it seems that one of the accepted solutions is a "grid blocking"
>> circuit to kill the spurious signal.
>> The original relay clackty-clack which keys the osc and finals
>> simultaneously works pretty well if you have a stable supply.My curiosity
>> was piqued when I saw the original design, so I wanted to try it "their
>> way". No modern post WWII stuff works that way, so it was "new to me" in
>> that sense, just like backwaves. This group has been an education for me.
>>
>>
>>
>>
>
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