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

["Mike Westfall, Lost Almost NM" <mwdx@xxxxxxxxxx>]

Excellent!

I like those limits.



On Feb 11, 2008 9:55 AM, John H. Bryant <bjohnorcas@xxxxxxxxxxxxxx> wrote:
> 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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-- 
Mesa Mike
LA de NM
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