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,
-Geoff/W5OMR
A: Yes.
Q: Are you sure?
A: Because it reverses the logical flow of conversation.
Q: Why is top-posting annoying in email?
