[IRCA] Definition of the "Unlimited Class" of Ultralight Radio

["John H. Bryant" <bjohnorcas@xxxxxxxxxxxxxx>]

The Definitions Committee was called into action to more precisely 
define the erh, ah, limits of the Unlimited Class of Ultralight 
Radios for the purposes of the Firsts and Records List and the 
upcoming DX Sprint.  Some very creative folks had even thought of 
using the ULr simply to tune the IF of a communications receiver and 
have that mega-buck receiver do the heavy lifting (or some such.) 
That is obviously not what we had in mind when we founded a Class 
that would encourage modification and supplementation of 
Ultralights....  So, after quite a bit of work, the Committee adopted 
the attached paragraph.  I think that they did a great job of 
balancing the desire to have broad latitude for experimentation while 
also preserving the essential quality of an Ultralight receiver. I've 
adopted the paragraph for purposes of the List and will place a file 
at DXer.ca that defines both Barefoot and Unlimited Classes for all to see.




"Unlimited Class is any UL radio as defined and recognized by the 
committee with any of the following changes or additions:  Internal 
modifications relating to BPF or IF filter replacement or improvement 
and replacement of resistors and capacitors in the audio processing 
section are permitted and encouraged.  Peripheral accessories such as 
preamps, external antennas, amplified or passive, dsp or analog 
filters, Q-multiplier, antenna couplers, tuners, phasers or other 
matching devices may be used.  The incoming signal must first enter 
the ferrite bar antenna of the UL, or the ferrite bar may be bypassed 
and signal fed into the RF and IF stages via the input points of the 
bypassed ferrite antenna, being processed solely through the complete 
circuitry of the UL (excepting the ferrite bar antenna if 
desired.)  The purpose and spirit of this rule is to use all of the 
internal circuitry of the UL.  Other than at the antenna input where 
the signal input may be pre-amplified, through use of tuned circuits, 
RF amplifiers and Q-multipliers, no active device may be inserted 
into the circuitry. This disallows heterodyning or frequency 
conversion devices where by the Ultralight is used solely as an IF 
amplifier, fixed or tunable.  This rule does not prevent the 
attachment of a digital frequency readout device."



John B.
Stillwater, Oklahoma, USA
Rcvrs: WiNRADiO 313e, Eton e1, NRD-535(kiwa-mods)
Antennas: 700' NE/SW mini-Bev, Wellbrook Phased Array (pre-production version)

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