[CW] Fwd: [Radio Officers, &c] Titanic Radio Room gear. What is known about the technical parameters and dimensions, feeder system of the Titanic

[Darrel]

Several years ago, I had the chance to visit Marconi's birthplace at 
Bologna in  Italy,  now set up as a museum.  In Marconi's workshop, they 
demonstrated a working Maggie receiver, tuning in some local AM stations 
with it.  I was astounded at the sensitivity of the Maggie.

    Cheers,
                Darrel, aa7fv.

On 3/11/2020 1:35 PM, Richard Knoppow wrote:
> This is an extremely interesting site. Very good illustrations. Also, 
> was it on this list that there was a discussion of a purported 
> recording of the Titanic's SOS? This site may provide part of the 
> answer because it gives the audio modulation frequency of the MGY 
> signals. Wrong for the purported recording.
>    Also interesting that the operators liked the Marconi "magie" 
> better than the early tube detectors, not surprising when you 
> understand how crude the tubes were.
>    Thank you so much for posting this link.
>
> On 3/11/2020 12:49 PM, D.J.J. Ring, Jr. wrote:
>> Members of CW Reflector will enjoy this.
>>
>> 73
>> DR
>>
>> ---------- Forwarded message ---------
>> From: Jerry Proc <jerry.proc at sympatico.ca>
>> Date: Wed, Mar 11, 2020 at 2:17 PM
>> Subject: RE: [Radio Officers, &c] Titanic Radio Room gear. What is
>> known about the technical parameters and dimensions, feeder system of
>> the Titanic
>> To: <radio-officers at googlegroups.com>
>>
>>
>> Information on Titanic's antennas can be found here.
>> http://www.halifax-arc.org/pdf/TitanicRadio1.pdf
>>
>>
>> -----Original Message-----
>> From: radio-officers at googlegroups.com
>> [mailto:radio-officers at googlegroups.com] On Behalf Of D.J.J. Ring, Jr.
>> Sent: Wednesday, March 11, 2020 1:35 PM
>> To: Radio Officers Google Group
>> Subject: Re: [Radio Officers, &c] Titanic Radio Room gear. What is
>> known about the technical parameters and dimensions, feeder system of
>> the Titanic
>>
>> Hello Dave,
>>
>> Doing some research on early aerials like Titanic used, I found that
>> they were usually parallel wires but some coast stations tried
>> "zig-zag" type of wires.
>>
>> That is wires running from the origin to the end of the flat top,
>> going down a 30 cm (aprox. one foot) and then running the wire back to
>> the origin, but when reaching the origin, again going down 30 cm (1
>> foot) and then continuing outward again towards the end, making one
>> continuous wire but zig-zagging instead of parallel wires.
>>
>> This was known to increase the radiation resistance.  I have a 1930
>> Bern book of ships, and I believe Olympic was still listed, ships were
>> given with antenna current measurements.
>>
>> I'll take a look.
>>
>> 73
>>
>> DR
>>
>> On Wed, Mar 11, 2020 at 12:37 PM g4jht <g4jht at eircom.net> wrote:
>>> I have come in on this fairly late but have a couple of questions that
>>> may have been asked previously.
>>>
>>> What is known about the aerial/antenna arrangement of the Titanic and
>>> the lead-in/feeder setup?
>>> Also the technical properties of it aerial(s) , capacitance and
>>> radiation resistance, meter-amp rating (probably to early for that) or
>>> the physical dimensions needed to take a shot at calculating electrical
>>> properties.
>>>
>>> 73,
>>>      Dave in Ireland.
>>>
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>> =30=
>