Quote:
Originally Posted by Electronic M
It had the speaker right on the front like any other generic AA5....It would seem that there must have been some kind outlet in the wall for it, but I'm not the one who got that chassis out of it's original place of installation so I can't say for sure...
One thing to bear in mind most pre-war homes and some postwar did not use drywall or insulation between rooms. Thin boards would be nailed in, cement slathered over them then plaster....Very sound proof and decent insulation (honestly insulation on inside walls is only useful for sound proofing). On AA5 that could be fit in walls like mine they kept at least 4" clearance above the tubes (as could be seen in the design...There may have been top vents too), on deeper sets like the OP's and TVs the back of the set either stuck out into another room or a walled off dead space...
It is not as easy to start solid wall material on fire with tubes as you think...If it was the average wood cabinet radio or TV would be a fire bomb...I've got an OTL tube amp with north of 300W draw from the TUBE HEATERS ALONE sitting ~2.5" from the ceiling in a closet, and that sucker has been on nearly 12 hour days sometimes...It's never gotten close to causing a fire.
Your friend's set is almost certainly Post WWII (prewar and early post war stuff was usually octal 50L6 12SQ7 12SA7 12SK7 35Z5) That set is probably post 1946, and more likely 50's.
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That makes sense, but either way, I've told my friend that it would be kind of cool to try and see if he could get that old intercom system of his up and running again because I do have several of the tubes that his radio needs if some of them happened to be duds (although the other thing I didn't think of as to why his intercom/radio receiver might not of been working was probably because it has a bad tube in it because of the fact that its a hot chassis set which means that if one of the tubes was bad the unit wouldn't power up because it would be like a set of series strung Christmas lights if one goes out they all go out, so actually his intercom system might be working just fine, it just needs a new tube or two...
