[ARC5] Off topic

[J. Forster]

I agree it's a remarkable set.

Sadly, it was much maligned by hams after WW II who (wrongly) thought
that, because it had a coax connector, it could be hooked directly to a 50
Ohm antenna. Not so. Just as with an ARC-5 type, it is designed to have a
series resonant antenna circuit. In the WS 19, the rollerductor function
has been remoted to the Variometer.

-John

===============



> 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
>>
>> ========
>>
>>
>>
>> ______________________________________________________________
>> ARC5 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/arc5
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:ARC5 at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
>