You have an 80m attic????
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
Sent: Monday, February 28, 2011 2:41 PM
To: [log in to unmask]
Subject: Re: [TN] NTC: GEC BRT 400S
Thanks all for help.
I'm making a spider antenna (Rothammel), 6 beams
10 m = 2x2.5
15 m = 2x2.38
20 m = 2x5.05
40 m = 2x10.1
80 m = 2x19.8 m
Will rig it in the attic with a 1:1 balun and RG-82 double shield down to
the input and north-south direction. A multiband dipol with other words.
What do you think? I've no idea about the Q and VSWR, nor Za
Inge
----- Original Message -----
From: "Ahne Oosterhof" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, February 27, 2011 8:02 PM
Subject: Re: [TN] NTC: GEC BRT 400S
>I searched BING for "+Antenna +lf" and found small ready made antennas
> covering the band you mentioned for less than $200 and some descriptions
> of
> antennas like those on your ship.
> No idea regarding which is best or even acceptably useful.
>
> Have fun,
> Ahne.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
> Sent: Sunday, February 27, 2011 10:38
> To: [log in to unmask]
> Subject: Re: [TN] NTC: GEC BRT 400S
>
> Thanks, Steve & Blair,
>
> the manual is excellent, thanks again. Unfortunately very little about
> antennas.
> When I look through the 56 ps manual, I realize this is a very advanced
> machine for its age. They are said to be one of the best for that time.
> Just
> wonder what they cost then? Nothing for the picnic, weight 75 pounds!
>
> A funny problem: it's almost impossible to get the old copper lines with
> porcelain isolators. Whoever I try look at me as being a Neanderthaler.
> So,
> seems as it will be a variable dipol of some kind. From what you say,
> Blair,
> it will be little of a monster to cover all bands. On the other hand, is
> there anything today at kHz bands? Beacons? Navigation buoys? Radio sonds?
> I
> guess my old receiver will be laughed at by the VHF/UHF/GHZ radios: "
> Have
> you seen, folks, a GEC BRT 400S...ho-ho-ho..it smells of stinky selenium
> rectifier and leaking electrolytes. Poor thing, got a frequency range like
> an elephant..ho-ho....use capacitors with blades and gear boxes..no, no,
> not
> kidding....and you should see the line transformer...my...weight as a six
> feet man...guys...let's help him back to the museum.."
>
> Inge
>
> On 27 February 2011 17:19, Steve Gregory
> <[log in to unmask]>wrote:
>
>> Hi Inge!
>>
>> Haven't heard from you in quite sometime! Glad to hear from you! I have
>> your pictures posted:
>>
>> http://stevezeva.homestead.com/Inge_s_Lab.jpg
>>
>> You have a nice little lab to work in! Here's your receiver:
>>
>> http://stevezeva.homestead.com/Inge_s_BRT400.jpg
>>
>> I know nothing about antennas, but I did find this. I don't know if you
>> have a manual for your receiver, but here's one for download:
>>
>> http://bama.edebris.com/manuals/ge/brt400
>>
>> But before you can see it, you will have to download this viewer:
>>
>> http://windjview.sourceforge.net/
>>
>> It's almost like an Adobe *.pdf viewer
>>
>> In the manual, it does talk about antennas (they are called aerials in
>> the
>> manual) on page 20 and 21.
>>
>> Steve
>>
>> -----Original Message----- From: Blair Hogg
>> Sent: Sunday, February 27, 2011 10:46 AM
>> To: [log in to unmask]
>> Subject: Re: [TN] NTC: GEC BRT 400S
>>
>>
>> Inge,
>>
>> I'll wait for the photos, but an antenna is an antenna. It can either be
>> resonant at a particular frequency or tuned by an antenna tuner as
>> needed.
>> Probably for a wide coverage receiver a long wire antenna is the easiest
>> place to start. The longer the better, up to a certain point.
>>
>> If you are interested in a particular band of frequencies, a dipole works
>> well, but tends to be directional - not necessarily a bad thing.
>>
>> For 28 MHz I've used dipoles that are roughly 5.8 meters on each leg. The
>> length varies inversely with the frequency, so at 3 MHz the dipole would
>> need to be 58 meters or so. But any piece of wire will work, some will
> work
>> better than others.
>>
>> Once I see the photo I'll refine my comments.
>>
>> Blair
>>
>> On Sun, 27 Feb 2011 14:57:42 +0100, Inge Hernefjord <
>> [log in to unmask]>
>> wrote:
>>
>> Hi, when I left the navy decades ago, I missed my radio equipments.
>>> However,
>>> I succeded to save one traffic receiver as you can see on the photo (if
>>> Steve can give a hand). This machine is of course stonaged and
>>> hopelessly
>>> behind technology of today, but of nostalgic reasons I would like to
>>> give
>>> it
>>> a try. I've spent some money for service and now the receiver can work.
>>>
>>> Now, I've little knowhow about aerial antennas for 380 Kc/s to 30 Mc/s.
>>> I
>>> remember I had a network of copper lines across the destroyer, but know
>>> nothing of the design.( Had to be repaired frequently after shooting
>>> with
>>> the anti-aircraft artillery).
>>>
>>> So, to the question: Anyone familiar with the GEC 400S? How would a
> modern
>>> antenna look like and what kind of tuning and compensation is necessary
>>> ?
>>> I've contacted some DX guys, but they know nothing about this antiquity.
>>>
>>> Wait for the photos.
>>>
>>> Inge
>>>
>>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 15.0
>> To unsubscribe, send a message to [log in to unmask] with following text in
>> the BODY (NOT the subject field): SIGNOFF Technet
>> To temporarily halt or (re-start) delivery of Technet send e-mail to
>> [log in to unmask]: SET Technet NOMAIL or (MAIL)
>> To receive ONE mailing per day of all the posts: send e-mail to
>> [log in to unmask]: SET Technet Digest
>> Search the archives of previous posts at:
>> http://listserv.ipc.org/archives
>> Please visit IPC web site
>> http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional
>> information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
>> ext.2815
>> -----------------------------------------------------
>>
>> ______________________________________________________________________
>> This email has been scanned by the MessageLabs Email Security System.
>> For more information please contact helpdesk at x2960 or
> [log in to unmask]
> __________
>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 15.0
>> To unsubscribe, send a message to [log in to unmask] with following text in
>> the BODY (NOT the subject field): SIGNOFF Technet
>> To temporarily halt or (re-start) delivery of Technet send e-mail to
>> [log in to unmask]: SET Technet NOMAIL or (MAIL)
>> To receive ONE mailing per day of all the posts: send e-mail to
>> [log in to unmask]: SET Technet Digest
>> Search the archives of previous posts at:
>> http://listserv.ipc.org/archives
>> Please visit IPC web site
>> http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional
>> information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
>> ext.2815
>> -----------------------------------------------------
>>
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site
> http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional
> information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
> ext.2815
> -----------------------------------------------------
>
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site
> http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional
> information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
> ext.2815
> -----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender.
Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail.
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
