[Jukebox-list] 1468 Sound Volume (was Speaker connection)

[francois.v at videotron.ca]

Thanks Wes for your answer.

I connected everything as per manual and I am doing these tests with the mech and speakers outside of the cabinet (on the working bench).  May be I will have louder volume once everything is put back into the cabinet put I doubt it.

I will also try another set of EL34.

I am starting to think that these amps are just weaker than the other ones.  There are very few tubes in it compared to any other 50s jukes I have seen.  It is ceratinly weaker than my 1700, 1100, 1428, and M100C.

What do you guys think ?  How does the Tempo 1 mono version compare to your other jukes in terms of sound quality and power (volume) ?

Looking forward to hear back from you guys.

Bye  :-)
Francois
----- Message d'origine -----
De: Wesley Dean <wesleydean at cox.net>
Date: Mardi, Septembre 19, 2006 11:17 am
Objet: Re: [Jukebox-list] Speaker connection
À: Jukebox mailing list <jukebox-list at lists.netlojix.com>

> It is a common mistake for people to confuse AC impedance 
> with DC resistance. Audio speakers are classified by impedance, 
> not resistance. The impedance of a system varies with the 
> resonant frequency. Inverse feedback in the amplifier is there 
> to correct any mismatch. That is why the fader control varies 
> the total volume and not the quality. Wes 
> ----- Original Message ----- 
> From: "Francois Villeneuve" 
> To: "Jukebox mailing list" 
> Sent: Monday, September 18, 2006 10:47 PM
> Subject: RE: [Jukebox-list] Speaker connection
> 
> 
> Thanks Joey for the input,
> 
> I do have the manual and connected the speakers as per the manual.
> 
> When I measure resistance on the speakers disconnected, I get 
> something like
> 14 ohms, but when I do measure them connected as per the manual, 
> I get 7.3
> ohms. According to the manual, I think the total load at the speaker
> terminals on the amp should be of 8 ohms. So this portion seems ok.
> 
> Now, the amp was just rebuilt (all caps changed including filters),
> installed a new Pickering NP/AC cartridge (two grounds connected 
> togetherand two signals connected together). The output of this 
> cartridge is rated
> at 10mV, one of the highest outputs out there.
> 
> I just installed 2 new Svetlana EL34 and all other tubes checked good
> (according to the reliable guy who rebuilt the amp)
> 
> The sound is very good but seems a bit too low, even at MAX. 
> The phono
> switch is set at Phono only. Now this is the first time I hear 
> a 1468, so
> may be this is normal but it is certainly much lower than all my 
> other jukes
> (1700, 1428, 1100, 100C).
> 
> Any suggestions as to where I should look ?
> 
> Thanks in advance
> Bye :-)
> Francois
> 
> -----Message d'origine-----
> De : jukebox-list-bounces at lists.netlojix.com
> [
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