[time-nuts] Fury Interface Board simulation results

Bruce Griffiths bruce.griffiths at xtra.co.nz
Wed Dec 12 10:22:10 UTC 2007


Rex wrote:
> Thanks. Great! Commonly available part.. I agree one part for both is good.
>
>
>   
Rex

One caveat is the dc current flowing in the output transformer may cause
too much distortion (actual specification on the data sheet is somewhat
unclear/ambiguous), in which case capacitively coupling the output
transformer and using an inductive shunt feed arrangement will cure this
problem. Of course the ideal location for series tuned shunt traps
(tuned to fundamental and say 4th harmonic) is from the output
collectors to ground. These short unwanted harmonic currents to ground
allowing a relatively simple low pass filter to be used to cleanup the
output without contributing significant phase shift and associated
tempco to the desired second harmonic output. The net dc current flowing
in the input transformer secondary will be very small.

Bruce




More information about the Time-nuts_lists.febo.com mailing list