[DennyL]

The SR-71 is a 'dual-mon' amplifier and it has two 9v batteries. Is there a battery per channel so that each channel has 9v available, or are the batteries in series so that each channel has available 18v of voltage swing?

 

[epaludo]

I'm not sure, but i don't think it's one battery per channel.
It wouldn't be good if the batteries didn't drain in the same level, considering one battery for each channel ...

 

[Icarium]

Yeah sounds pretty unlikely.

 

[zer010gic]

They are probably in parallel thus giving more amp hours with the the save voltage of 9v. Thus the long battery life the SR-71 has.

 

[DennyL]

Quote:

Originally Posted by zer010gic /img/forum/go_quote.gif They are probably in parallel thus giving more amp hours with the the save voltage of 9v. Thus the long battery life the SR-71 has.

If they are not in series to get 18v, wouldn't it be more 'dual-mono' to keep them separate?

 

[antonyfirst]

How long does a set of batteries last on a SR-71?

 

[Asr]

"Dual mono" refers to when an amplifier uses a "monophonic" amplification stage in each channel for complete channel separation - called "dual mono" because it essentially amplifies each channel separately, instead of together. The RSA site has internal pics of both the XP-7 and HR-2 which are dual mono, so you can get an idea of what that looks like. I don't see where it mentions that the SR-71 is dual mono though...?

And yeah, the batteries are most likely wired in parallel, because that's what dual mono means - the monophonic amplification goes all the way down to the power supply.

 

[DennyL]

Quote:

Originally Posted by Asr /img/forum/go_quote.gif I don't see where it mentions that the SR-71 is dual mono though...?

'Dual Mono' is written on the unit!