Howard 626 shortwave

4/1/2009 6:31:40 PMDave

Hi everyone! I've just acquired a Howard 626 shortwave from 1938 I believe. I know absolutely nothing about tube radios. I've downloaded the schematics from this site...and I can understand the pictures, but not much else. My question is, there is a wire connected to what I think is the oscillator, but it doesn't connect to anything else, it's just dangling. Should that be connected to something? There is a wire running from the R.F. to the top of the 6A7 Mixer tube, which I think is correct. There's also 2 wires coming out of the base, 1 I think is the antenna..the other is maybe a ground? And that's not attached to anything...should it be? My A.M. works, but nothing else. All the tubes lite up. It's pretty cool! :-) Thanks for any help!

Dave

4/1/2009 10:44:21 PMEdd

Consulting the far left side of the schematic it has two wires running vertically, the top left is for your
Looooooooooooooooooooooooooooooong outdoor antenna wire if you wants your SHORT WAVELETS coming in,
and usually that reception is particular about the time of day versus different frequencies.

Differentiating your 2 wires :

The top left ANTENNA wire (brown if still can be made out ) is going in to the band switch.

The left bottom GROUND wire ( black color) is going to a connection to the metal chassis.

73's de Edd

4/2/2009 1:24:19 PMWalt

I really enjoy these old 'boatanchors'. I've spent many pleasurable hours listening to distant finds with a longwire antenna.
Some BFO oscillator circuits do use a wire that goes 'nowhere'. It is called a 'gimmick' and acts as a capacitor to couple it to the circuit in it's proximity.
'Tickler' coils also go nowhere on paper, but being in the field of an adjacent coil, they pick up influence from that coil. They are all methods of coupling.

4/2/2009 6:48:24 PMDave

Thanks for the replies guys! I guess I should re-attach the black ground to the chassis.

Dave