[Vintage-Audio]V40#15- BIG Wire

Thu Dec 13 15:33:16 EST 2007

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: http://mailman.qth.net/mailman/listinfo/vintage-audio
>>> List Administrator: Duane Fischer, W8DBF
>>> ** For Assistance: dfischer at usol.com **
>>>
>>>
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>>
>> _______________________________________________
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>> ** For Assistance: dfischer at usol.com **
>>
>
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> ** For Assistance: dfischer at usol.com **
>
>
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