[R-390] 600 to 8 ohm speaker converter

B Riches bill.riches at verizon.net
Sat Dec 17 17:34:50 EST 2022


 The best transformer is the 119DA from Hammond.  One that works very well is a sound system 10 watt-70 volt line to speaker transformer.  the 10 watt tap is 500 ohms!  More common may be 8 watt transformers.  Close enough!
73,
Bill, WA2DVUCape May, NJ
    On Saturday, December 17, 2022 at 04:26:23 PM EST, Joe O'Brien via R-390 <r-390 at mailman.qth.net> wrote:  
 
 A while back there was a long thread on transformers for the 600 ohm local audio output.  I guess it must be 25 years or more I got one I think based on this list, a RADALAB, INC. transformer, but with no discernable part number on it.  I used a Realistic 8 ohm speaker which I think always had great audio.  I had the R-390A Local Audio 6 connected to the transformer Primary 1, and Local Audio 7 to Primary 2.  I forget now which of the Secondary 1 and 2 outputs from the transformer went to the speaker's black -, and to the speaker's red +.  Any help on which is best?  Or just trial and error?  I'm usually more on the error side of things LOL!  Thanks!
Lengthy stretches being out of the country and a home move ten years ago kept a lot of my stuff packed away for so long, and I have yet to even finish unpacking, plus have seemed to have forgotten a lot of things.  And I may even have a Hammond 119DA around someplace, but just where I don't know.
73/Good weekend,Joe/Former KG4DVB     
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