[Vintage-Audio]V40#15- BIG Wire
wolfbob
wolfbob at csnsys.com
Thu Dec 13 17:51:41 EST 2007
I did have a report of a noisy signal 5 miles away. I lived
on a hill (Mt. Tabor, in Portland, OR) and was heard in
Council Crest, another hill. My house was next to a park and
I played tennis and liked to listen to MY MUSIC while I
practiced. My little tube portable radio and my record
changer would give me about and hour of good stuff. I had a
GE portable with a rechargable lead acid 2 volt battery and
it would last about as long as my stack of records.
WBob, WB6JPI
----- Original Message -----
From: "Duane Fischer, W8DBF" <dfischer at usol.com>
To: "Vintage home and professional audio equipment from 1975
back" <vintage-audio at mailman.qth.net>
Sent: Thursday, December 13, 2007 12:33 PM
Subject: Re: [Vintage-Audio]V40#15- BIG Wire
> Bob,
>
> Did you ever receive any DX reports? Such as the next
> street south or two blocks east? Any idea how far your
> signal traveled?
>
>
> Duane Fischer, W8DBF/WPE8CXO
> dfischer at usol.com
> HHI: Halligan's Hallicrafters International
> http://www.w9wze.net
> HHRP: Historic Halligan Radio Project
> hhrp.w9wze.net
>
> ----- Original Message -----
> From: "wolfbob" <wolfbob at csnsys.com>
> To: "Vintage home and professional audio equipment from
> 1975 back" <vintage-audio at mailman.qth.net>
> Sent: Thursday, November 29, 2007 11:13 PM
> Subject: Re: [Vintage-Audio]V40#15- BIG Wire
>
>
>> I'll admit to it. I had my own 4 block coverage on 690KHz
>> and played 78 RPMs, mostly Big Band Jazz.
>>
>> I was 12 or so at the time.
>>
>> WBob
>>
>>
>> ----- Original Message -----
>> From: "Duane Fischer, W8DBF" <dfischer at usol.com>
>> To: "Vintage home and professional audio equipment from
>> 1975 back" <vintage-audio at mailman.qth.net>
>> Sent: Thursday, November 29, 2007 5:20 PM
>> Subject: Re: [Vintage-Audio]V40#15- BIG Wire
>>
>>
>>> Hey Michael,
>>>
>>> Remember when most of us found some empty soup or
>>> vegetable cans in the trash can, rinsed them out, used a
>>> hammer and nail to punch a hole in the bottom, stuck a
>>> string through the hole, put a small washer on the end
>>> of the string and tied a knot to keep it from coming off
>>> ... Did the same on the other end of that non-conductive
>>> telephone wire and had our secret phones from one bunker
>>> bush to another? At least 'our' telephone company did
>>> not keep increasing the rates!
>>>
>>> What was a little bit scary was when we really thought
>>> we did hear a faint far off voice answer us!
>>>
>>> I wonder how many on this list would admit to building a
>>> 100 milliwatt transmitter and playing 45 rpm singles
>>> over the air as they had visions of being a DJ dancing
>>> in the canyons of their minds?
>>>
>>>
>>>
>>> Duane Fischer, W8DBF/WPE8CXO
>>> dfischer at usol.com
>>> HHI: Halligan's Hallicrafters International
>>> http://www.w9wze.net
>>> HHRP: Historic Halligan Radio Project
>>> hhrp.w9wze.net
>>>
>>> ----- Original Message -----
>>> From: "michael salmons" <salmonsm at missouri.edu>
>>> To: "Vintage home and professional audio equipment from
>>> 1975 back" <vintage-audio at mailman.qth.net>
>>> Sent: Wednesday, November 28, 2007 7:34 PM
>>> Subject: Re: [Vintage-Audio]V40#15- BIG Wire
>>>
>>>
>>>>
>>>> I've already let the cat out fo the bag regarding my
>>>> slack attitude toward wire... but I can say I have used
>>>> coax for speaker wire before and found it to be
>>>> perfectly satisfactory.
>>>>
>>>> Then again, I use LAMPCORD <roll eyes>...
>>>>
>>>> Just joshin.
>>>>
>>>> Michael
>>>>
>>>> On Nov 28, 2007, at 5:20 PM, Phil Barnes-Roberts WA6DZS
>>>> wrote:
>>>>
>>>>> vintage-audio-request at mailman.qth.net opined on
>>>>> 11/28/2007 01:03 AM:
>>>>>> ---------------------------------------------------------------------
>>>>>> ---
>>>>>> Subject: Re: [Vintage-Audio] Re Speaker Wire Options
>>>>>> From: "wolfbob" <wolfbob at csnsys.com>
>>>>>> Date: Tue, 27 Nov 2007 19:29:40 -0800
>>>>>> To: "Vintage home and professional audio equipment
>>>>>> from 1975 back" <vintage-audio at mailman.qth.net>
>>>>>> Duane.
>>>>>> I said it before and will always say it. USE BIG
>>>>>> WIRE. Think of Ohms Law a minute. If you are running
>>>>>> 20 watts into what is probably 4 ohms (at 50-100 Hz
>>>>>> into a big speaker. They are 8 ohms or so at 1000Hz)
>>>>>> you will have about 9 volts across the speaker and
>>>>>> will be drawing about 2.5 amps. Now if your speaker
>>>>>> wire has 0.5 ohm of resistance you will loose 1.25
>>>>>> volts or about 2 dB of bass. You can easily hear
>>>>>> this loss. If you don't believe me run your #24+
>>>>>> wire and in parallel run some #14 or #12 and do an
>>>>>> A/B test and play your bass singer. He will fade
>>>>>> into the background. I have #14 speaker wire ala RS
>>>>>> running to all my speakers. Things get much worse if
>>>>>> you are punching those JBLs with some real peaks.
>>>>>> They just won't be peaks anymore as the IR losses eat
>>>>>> away your great audio.
>>>>>> WBob
>>>>> Hi, Guys (&Gals)--
>>>>>
>>>>> Not having run across #24 'Speed Wire' I'll have to
>>>>> pass on it; sounds like phone-closet twisted-pair
>>>>> stuff, though, or doorbell wire. Light. Way light.
>>>>>
>>>>> You've reminded me of something K8EBR, Tom Pierce told
>>>>> me one day in the EMC Lab at JPL, that agrees with
>>>>> Bob.
>>>>>
>>>>> If you really want 8-ohm-impedance pair wire, get some
>>>>> (surplus?) RG-11/U coax (stored indoors is best, so
>>>>> we'll hope it's uncontaminated with the jacket
>>>>> plasticizers after years in the sun, or on the
>>>>> shelf).
>>>>>
>>>>> Ignore the center conductor, and tie-wrap two pieces
>>>>> of this half- inch-or-so coax together along their
>>>>> length. That size conductor, jacket and spacing is
>>>>> supposed to come out to eight ohms. Twisting together
>>>>> (obviously, not very tight) helps cancel out fields
>>>>> over the length of the run - with any pair.
>>>>>
>>>>> You'd probably have to skin back jackets and braids,
>>>>> remove some center conductor and inner poly
>>>>> insulation, and twist the two stranded braids into a
>>>>> pair for your connections. A monster indeed!
>>>>> Anybody hear this one before?
>>>>>
>>>>> --
>>>>> '---O=o=O---'
>>>>> 73, Phil Barnes-Roberts WA6DZS < Mailto:pbarnrob at
>>>>> acm dot org >
>>>>> "When you are trying to get a handle on a big
>>>>> decision, try looking
>>>>> at it like this; 'What kind of world do I want to live
>>>>> in?'"
>>>>> --Ann Bodenhamer Martin, author of /Calico/
>>>>> /Families/
>>>>> _______________________________________________
>>>>> Home:
>>>>> http://mailman.qth.net/mailman/listinfo/vintage-audio
>>>>> List Administrator: Duane Fischer, W8DBF
>>>>> ** For Assistance: dfischer at usol.com **
>>>>
>>>> _______________________________________________
>>>> Home:
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>>>> List Administrator: Duane Fischer, W8DBF
>>>> ** For Assistance: dfischer at usol.com **
>>>>
>>>>
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>>>
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>>>
>>
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>
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