Comments | youreatarget: (без темы)

youreatarget

(Untitled)

Jul 26, 2006 21:31

turns out my amp's output impedance is 72 ohms

Comments 12

kiteskites July 26 2006, 11:34:05 UTC

is that good???

youreatarget July 26 2006, 11:58:49 UTC

well my speaker's is 8, and they should be matching. so this is bad.

youreatarget July 26 2006, 11:59:57 UTC

on the plus side i figured out why it's not loud enough

kiteskites July 26 2006, 12:01:41 UTC

ohkay......i'm never gonna pretend like i understand this kinda stuff

goodfights July 26 2006, 13:54:52 UTC

this represents what i know and understad about electronics:

( ... )

thenewblack July 27 2006, 11:23:22 UTC

hahaha, i love your comment. i leave tomorrow, i've got your address so i'll send you a postcard from somewhere good!!! xo

laconiclife July 27 2006, 00:23:54 UTC

you might have trouble finding an external speaker that matches up.

how is that gibson bass you bought? i hope you appreciate me not bidding on that thing cos you found it first. i really want to get one like that now. unless it is shit. then i will have to reconsider.

goodfights July 27 2006, 11:22:42 UTC

yeah, i think i need to fix that up somehow. i might cram in a second transformer to get the 72 down to 9ish, which will make it another 2-3kgs heavier :/

the bass is pretty sweet. it's short scale though. it's like the cheap version of the cheap version of the famous sg style bass. i need thicker strings to compensate for the scale, and i suspect one of the pickups isn't working. but it's pretty sweet.

global vintage has a greco copy of the long scale gibson eb-3 for about $900?

sold_for_sleep July 28 2006, 03:30:42 UTC

Cant you jut put a resistor in your speaker line or something to draw the load? + I cant remember but isnt having a huge output impedance a bad thing in terms of an effiecent amplifier design?

youreatarget July 28 2006, 04:10:21 UTC

it would make it more unlikely to break shit. and it would draw more voltage but the added resistance means less current, so the speaker itself would still get about the same power i think.

and yes it is. i used the original transformer but different tubes, and i assumed the impedance would be around the same (8 ohms) because the impedance of 4 valves in push pull doesn't vary much between tube types but i guess it does. one of my tubes might be blown now that i think about it.

dase July 28 2006, 05:37:04 UTC

did shit blow up?

youreatarget July 28 2006, 23:01:08 UTC

not yet. it's just a fraction of the loudness it should be