which fender is better

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coap01
Junior tube assistant
Posts: 97
(2/12/04 4:21 pm)
 which fender is better
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 hi all,

i will soon be building a new amp and i want to model the clean channel after a fender ab763 design. i looked on schematicheaven and fender had many amps use ab763 schem.

i noticed that the normal channel in bandmaster, pro, showman, and super reverb are identical running on the same B+ voltages, ~375V

the deluxe on the other had uses the same circuit as ones above but the B+ voltages are ~230V

how does the sound character differ in the deluxe running at lower voltage? i want a channel with lots of headroom on this channel. should i go with the higher B+ or lower?

thanks
--Lev
 
GroundhogKen
Forum Moderator
Posts: 2260
(2/12/04 8:16 pm)
 Re: which fender is better
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 The main difference is that the Deluxe is driving a pair of 6v6 tubes for 22 watts. Deluxes do not have lots of headroom. The other amps drive 6L6 and produce 30-40 watts.

If you want clean with headroom, use a Super Reverb as an example. It's really a great amp.

Ken
 
coap01
Junior tube assistant
Posts: 98
(2/13/04 9:29 am)
 deluxe
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 thanks ken.

Here another question. If i have lets say a super reverb, what would be the effect of dropping the B+ voltage for V1 by 100 volts? i'm slightly confused here regarding headroom. Does less voltage on the plates of a preamp tube mean that tube will saturate earlier therefore less headroom in preamp? I would imagine it would be the other way around...higher voltage -> less headroom. please clarify.

thanks
--Lev
 
ganzonimx
Hey get your own solder
Posts: 376
(2/13/04 7:31 pm)
 voltage Q in preamp
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 I like to pop up coap's question, because I was wondering more then one time about that...

As I understand higher plate voltages on the preamp gives better bass response, what else does it provide. I imagine also with a higher voltage the tube needs a stronger signal to be driven into saturation ore cutoff, would that mean a cleaner sound - am I right ore wrong on that?

And also what does mean "headroom"  

Cris
 
ganzonimx
Hey get your own solder
Posts: 381
(2/14/04 1:46 pm)
 Re: voltage Q in preamp
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 ...giving that Q a other pop over the week end...

 Cris
 
 
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