7 Transistor AM Radio Kit

[maxhifi]

I got mine today too! The IF and oscillator coils were hard to tell apart until I realized the oscillator has no cap in the bottom. The audio transformer has a dot on it to indicate which way it installs but it sure isn't obvious. Aside from having the world's worst speaker I am happy with mine.

Yellow wires are for the speaker. The B+ dropping reaistor is marked on the board as 100k, but it really is 100 ohms and is also correct on the schematic. The board has several little solder bridges which have to be closed to allow it to work, presumably for measuring current to assist students to troubleshoot.

[dieseljeep]

Originally Posted by maxhifi

I got mine today too! The IF and oscillator coils were hard to tell apart until I realized the oscillator has no cap in the bottom. The audio transformer has a dot on it to indicate which way it installs but it sure isn't obvious. Aside from having the world's worst speaker I am happy with mine.

Yellow wires are for the speaker. The B+ dropping reaistor is marked on the board as 100k, but it really is 100 ohms and is also correct on the schematic. The board has several little solder bridges which have to be closed to allow it to work, presumably for measuring current to assist students to troubleshoot.

The speakers are so shallow, that there's no place for the cone to move.
The novelty radios have the same type speaker and the poor tone proves it.
BTW, can you post the schematic. It seems interesting. Schematics are the universal language.

[maxhifi]

Originally Posted by dieseljeep

The speakers are so shallow, that there's no place for the cone to move.
The novelty radios have the same type speaker and the poor tone proves it.
BTW, can you post the schematic. It seems interesting. Schematics are the universal language.

Sure, can take a shot of it later tonight. It's really nothing amazing though, in concept it is strikingly similar to the Westinghouse 99A I just got yesterday (although implementation is slightly different!

The fun for me was getting my 9 year old daughter to help.. she had fun with the colour codes and reading all the tiny numbers on the components.

That speaker may be swapped out.. I have a too far gone USSR built portable radio with a similar size speaker, and I think it will provide far better tone.