Japanese AA5 midget (AJ5?) schematic

[John-Del]

Friend of my brother's dropped this off. This one is branded
Invicta. It's the type of radio shown on this link:

http://www.antiqueradio.com/Feb04_Macarthur_TubeRadio.html

She dropped the radio, tubes came loose, she installed them, POP and
dead, possibly smoke. The schematic was glued to the back of the
radio, but only the filament section survived. Has anyone scanned
this schematic?

John

[Roger Jones]

Good link, thanks. These are very basic AA5's. I actually built one
from a kit that had all small parts missing and no schematic - I just
used a generic AA5 circuit and it worked fine (very cramped to
build), It gets very hot! Keep well ventilated. Later I found a
schematic... if I can find it again I'll scan it, but the back of the
RCA tube manual is about as good. Except, IIRC, they have only one
IFT, the other is a tuned tank cct with cap coupling. I also had a
dead commercial one of these; fixed it and sold it on Craigslist.
Regardless, They're not my favourite sets, but fun in a crazy way!
Good luck. Cheers,
Roger

[John-Del]

All set Roger, got it going and sent it home. Only the 50C5 was
whacked, the rest is apparently OK. Polished the pink plastic
cabinet, cleaned and polished the knobs, cleaned the vol control,
cleaned the tube pins (cranky in the sockets) and done-ski. You're
correct, there's only one IF transformer, and it performs like it.
Lousy reception except for the locals, but it is cute. The owner
wanted it because her dad bought it for her when she was a child.

John

[Kenneth Scharf]

I vaguely remember building an AA5 kit from about that era. It had two
real IFT's though. It was a bit cranky though, it would play for awhile
and then suddenly quit with VERY low volume. I was able to fix it by
shuffling my feet on the carpet to build up a good static charge and
then touch the antenna stator of the tuning capacitor. I'm not sure
exactly what that did, but the radio would start to play again for
another half hour or so.

[Brenda Ann]

"Kenneth Scharf" wrote in message news:jp1h9u$3sj$1...@dont-email.me...

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Sounds like a buildup of charge on the grid of the 12BE6 and/or a fault in
the AGC line.