[ARC5] Off topic

[Michael Murphy]

I am amazed at the design of the WS-19 and consider it to be the best effort 
in the armor radio design in regard to using COTS materials and combining 
several functions in one set in the Second Word War. It also represents the 
first practical transceiver with shared stages and on channel instant 
netting as well as RIT. It is several years ahead of Collins first XCVR, the 
ARC-2. The WS-19 begins an alternate design approach of using many low cost 
parts to achieve performance rather than a few high quality parts in 
dedicated boxes. This is not the US design credo in WW2 where ruggedness and 
performance and the highest quality castings and components are ordered up. 
Performance must suffer some of course using a speedy adapted COTS design 
approach. This is the exact philosophy that gives us todays ICOMs; while not 
Collins, they are quite good radios.


----- Original Message ----- 
From: "J. Forster" <jfor at quikus.com>
To: "Lenox Carruth" <radios at sbcglobal.net>
Cc: <arc5 at mailman.qth.net>; "'Robert Eleazer'" <releazer at earthlink.net>
Sent: Friday, January 06, 2012 11:19 AM
Subject: Re: [ARC5] Off topic


> The WS 19 has two sets plus an intercom.
>
> The "A" set is HF (2-8 MHz) with about 15 W CW and 4 W AM, on a good day,
> and a superhet Rx. The AM modulation is not great.
>
> The A set also has a "Flick" mecanism, allowing rapid switching between
> Red and Blue frequencies.
>
> It also has a "B" set, roughly 220-230 MHz with output <1 watt and a regen
> Rx.
>
> It also has an intercom amplifier, and a primitive rebroadcast facility
> with manual T/R switching.
>
> Anyway, I think the concept was sort of like a Command/Liason structure.
> The A set was for command from a CP somewhere; the B set was for
> inter-platoon ommunications.
>
> The esign range of the B set was 1000 yards, as I remember, but this was
> very optomistic.
>
> The A set probably was not on a suitable frequency for good tactical
> comms. because of propagation issues. It does work fine for lo9ng range
> stuff. A friend and I have worked US to UK with one several years ago.
>
> Best,
>
> -John
>
> ========
>
>
>
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