[Milsurplus] LS-3 Speaker

[federico]

Hi Robert,
          I got the LS-3 that I bought from you few days ago, very very 
beautiful, really new. I opened the loudspeaker today and I found that also 
internally is really new, the impedence transformer is there, a little bit 
different from the transformer employed on the newer "green" LS-3. 73 de 
Federico IZ1FID

Federico BALDI
-Direttore S.C. Malattie Metaboliche e Diabetologia A.S.L. 11 - Vc
-Direttore del Dipartimento per la Cura delle Malattie di Lunga Durata
 A.S.L. 11 - Vercelli



Visit my website entirely devoted to military radio, military handguns 
and aircraft clocks :

www.dottorbaldi.it/militaryradio

---------- Original Message -----------
From: WA5CAB at cs.com
To: carolew at bellatlantic.net
Sent: Sat, 24 Jun 2006 19:47:15 EDT
Subject: Re: [Milsurplus] LS-3 Speaker

> Joe,
> 
> Input impedance for the LS-3 is 8000 ohms.  If you can wait a few 
> weeks I can supply you with a replacement.  I'm waiting on K5JV to 
> get his trailer emptied and have time to help me move the last batch 
> which includes some external junkers.  (As an aside, I test all of 
> the LS-3's that I sell.)   If you have a late model BC-342 or BC-348 
> and it is wired Lo-Z, you can also use a common 500/600 ohm line to 
> VC transformer.
> 
> To answer your last question, I wasn't aware of ithis until recently 
> but apparently after the War, LS-3 and LS-7 matching transformers 
> were somewhat sought after for use as plate to voice coil 
> transformers in home-brew receivers.  I'm in the same boat with 
> several otherwise good LS-7's here.
> 
> In a message dated 6/24/2006 6:28:29 PM Central Daylight Time, 
> carolew at bellatlantic.net writes: 
> > I bought an LS-3 speaker several weeks ago and just opened it up today. 
It 
> > turns out the
> > matching transformer is missing. What kind of matching transformer do I 
need 
> > to use this with a
> > BC-342 or BC-348? Is there any commonly available substitute?
> > 
> > As a matter of curiosity, why did people remove these matching 
transformers? 
> > This is the 2nd
> > LS-3 that I bought that turned out to be missing the matching transformer.
> > 
> 
> Robert Downs - Houston
> <http://www.wa5cab.com> (Web Store)
> MVPA 9480
> <wa5cab at cs.com> (Primary email)
> <wa5cab at houston.rr.com> (Backup email)
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------- End of Original Message -------