|[AMRadio] Modulator for DX60 available|
w5omr at satx.rr.com
Fri Apr 14 10:27:50 EDT 2006
Alan Beck wrote:
> I am sorry, did we work out how it could be interfaces with a DX 60?
> Normally there is a transformer in parallel with the output plate I
> think and modulation is applied to the other side to "squish" the RF
> at Audio frequencies.
> Is this what you mean by output iron?
> John Lyles wrote:
>> I have a self contained, commercial looking modulator chassis that
>> would work well with a DX60 sized rig. It uses a pair of 807s and has
>> the input and output iron and driver tubes. It came from a SK's pile
>> this summer. If there is interest, I would part with it to help out a
>> DX60 conversion to high level plate modulation. Its a small thang.
>> Technical details available upon request.
Alan, I'm pretty sure John's statement was meant to say that the
external modulator he had, would work with a rig that was around the
same size (ie: power output of around 50w) as a DX-60.
Of course, we all know that typical high-level plate modulated AM
requires a modulation transformer that is connected in series with the
B+ supply from the power-supply of the final, to the final stage
itself. The audio generated by a typical push-pull Class B modulator is
coupled via the modulation transformer to the B+ line.
I might be mistaken, but I don't think I've ever seen an 'external'
modulator deck that was built with the intention of screen/grid
modulating an RF final.
Hope that helps clear up some confusion.
73 = Best Regards,
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top-posting annoying in email?
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