okay, i got the amp and the home made case was in splinters. so i took it to the local tv repair guy who is an older gent that used to work on tv's when they had tubes. he checked it over, tried it out and pronounced it well, then gave me a demo of how it sounded with his instore stereo. while all the demo's tv's were running, all his test equipment and his puter which had a bigger screen than my dining table top.
the verdict was, no hum, no buzz and it worked.
now i found an old but nice bandmaster reverb cab it fit into and bought a couple of Celestion G12T-75 16 ohm speakers to make me an 8 ohm speaker cab. (you know what i am leading up to here...betcha huh!)
during the demo he showed me how the, we will call it the first speaker jack had to be plugged in order for the secondary jack (marked ext. speaker) to work.
the problem i have is the little line below the jacks says "8 ohms total". this is where the questions start! i plan on using the G12T-75's in parallel for a total load of 8 ohms into one jack. now...if i plug another speaker into the "ext speaker" jack, does the "first speaker" which evidently has a switch on it, center tap into the OT to halve the ohms impedence on both jacks for a total load of 8 ohms because they run in parallel when both jacks are used? i am under the impression the chassis is relatively unmodified. the OT has been replaced at one time, but the numbers on the OT confirms it is of OEM type and matching part number.
in other words what ohm impedence do i have to have on the second speaker cabinet now that i just bought an 8 ohms JBL 15" speaker for the second cab build? DUH?
![Huh? ???](https://bassoutpost.com/Smileys/default/huh.gif)
second question: is a Faraday shield in the top of the amp head really needed? i think i can make one out of some aluminum screening and my stapler gun.