[Vintage-Audio] Multiple Amplifier To Speakers Switch

Thu Oct 24 00:23:01 2002

Ed, 	

Yamaha 490 is solid state. H. Scott LK-72b is tube.	

----------
From: Ed Tanton <[email protected]>
To: [email protected]
Subject: Re: [Vintage-Audio] Multiple Amplifier To Speakers Switch
Date: Wednesday, October 23, 2002 3:24 PM

It's not a problem Duane to accommodate the entire set that specifically. 
The ONE possible problem would arise if either amp is solid-state AND 
didn't like a no-load condition. Most tube amps don't care THAT much... 
especially since I suspect your primary motive is for comparison purposes, 
and you could simply turn down the amp that was not in use. It can be done 
using relays and resistive loads to keep the amps happy... but that is the 
proverbial horse of a different color, cost and complexity-wise. I have 
been doing a lot of 'research' on this subject... some of which is adopted 
in my webpage article on a comprehensive ham/SWL station Dual-Channel 
8-Input Controller toward the bottom of my webpage: 
<http://www.qsl.net/n4xy/hmbw1.html> . It is a work-in-progress... but, for 
example, the SMT TL082's were ordered yesterday... so it's coming along nicely.

If you like, I will work something up from your description, and we'll go 
from there.

At 12:17 PM 2002-10-23, you wrote:
>Ed,
>
>Here is the difficulty:
>
>H. Scott amp has screw terminals, like on a terminal strip. Yamaha amp has the
>spring load insert wire and release pressure connectors. The speakers have
>vertical metal shafts protruding out the back with a hole through the 
>center the
>wire passes through and a thumbscrew type nut tightens down to hold them in
>place. The switchbox has RCA female plugs.
>
>The two amps are fifteen feet apart, can not be put side by side. The speakers
>are twenty feet apart. One amp is by one speaker.
>
>Any suggestions?
>
>Answer: Two more vintage speakers! Help!
>
>----------
>From: Ed Tanton <[email protected]>
>To: [email protected]
>Subject: RE: [Vintage-Audio] Multiple Amplifier To Speakers Switch
>Date: Wednesday, October 23, 2002 10:07 AM
>
>Want me to whip you one up Duane? What about make-before-beak... in this
>case it would seem to be undesirable. What's the power level?
>
>At 10:01 AM 2002-10-23, you wrote:
> >Duane, could you just convert your existing cables to RCA only at the
> >switchbox? You'd just need four adapters to make the transition. Not the
> >purest solution, but it would work.
> >
> >Michael
> >
> >-----Original Message-----
> >From: Duane Fischer, W8DBF [mailto:[email protected]]
> >Sent: Monday, October 21, 2002 5:30 PM
> >To: [email protected]
> >Subject: [Vintage-Audio] Multiple Amplifier To Speakers Switch
> >
> >
> >
> >
> >I have two stereo amplifiers and one set of speakers that I need to switch
> >back
> >and forth between. Ideally, a second set of speakers would be the
> >solution, but
> >thus far no vintage speakers have shown up.
> >
> >The switch I found at Radio Shack, used RCA jacks, not screw terminals or
> >pressure connectors for the speaker wires. Because the amplifiers are 
> fifteen
> >feet apart and the speakers are eighteen feet apart, I would have a 
> fortune in
> >the switch and sixteen cables to wire this contraption up.
> >
> >Does anybody make, or do any of you happen to have, a switch that will
> >permit me
> >to switch one set of speakers between two amplifiers that does not use rca
> >jacks?
> >
> >Thanks.
> >
> >Duane Fischer, W8DBF
> >[email protected]
> >
> >_______________________________________________
> >Home: http://mailman.qth.net/mailman/listinfo/vintage-audio
> >List Administrator: Duane Fischer, W8DBF
> >** For Assistance: [email protected] **
> >_______________________________________________
> >Home: http://mailman.qth.net/mailman/listinfo/vintage-audio
> >List Administrator: Duane Fischer, W8DBF
> >** For Assistance: [email protected] **
>
>73 Ed Tanton N4XY <[email protected]>
>
>Ed Tanton N4XY
>189 Pioneer Trail
>Marietta, GA 30068-3466
>
>website: http://www.n4xy.com
>
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>LM: ARRL QCWA AMSAT & INDEXA;
>SEDXC NCDXA GACW QRP-ARCI
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>
>_______________________________________________
>Home: http://mailman.qth.net/mailman/listinfo/vintage-audio
>List Administrator: Duane Fischer, W8DBF
>** For Assistance: [email protected] **
>_______________________________________________
>Home: http://mailman.qth.net/mailman/listinfo/vintage-audio
>List Administrator: Duane Fischer, W8DBF
>** For Assistance: [email protected] **

73 Ed Tanton N4XY <[email protected]>

Ed Tanton N4XY
189 Pioneer Trail
Marietta, GA 30068-3466

website: http://www.n4xy.com

All emails <IN> & <OUT> checked by
Norton AntiVirus with AutoProtect

LM: ARRL QCWA AMSAT & INDEXA;
SEDXC NCDXA GACW QRP-ARCI
OK-QRP QRP-L #758 K2 (FT) #00057

_______________________________________________
Home: http://mailman.qth.net/mailman/listinfo/vintage-audio
List Administrator: Duane Fischer, W8DBF
** For Assistance: [email protected] ** 