10-11-2015, 05:09 PM
Had time today to have a quick look at this set.
The bakelite case is intact which surprised me as it feels to be quite thinly moulded, but very dirty and dull.
A check round with the meter revealed one blown pilot bulb, transformers OK. No shorts. The 6" remains of the mains wires were rotten rubber, elsewhere it is pvc.
Tuning cap mounting rubbers rotten and collapsed but the unusual cord drive still works well.
Valve filaments all intact. So on the lamp limiter it went. No frights so gave it full mains. Electrolytic caps not getting warm as the HT came up, and voila! Sound! With a bit of aerial wire there are sounds on all wavelengths.
HT a bit low, shorting the anode of the EF94 to chassis brought a big increase, so the capacitor to the g1 of the EL90 output valve was leaking. Tried to restuff it but the caps are glass tubes sealed with pitch, very thin and fragile. A new yellow peril replaced it.
That cooled the output valve's ardour and restored a good HT voltage, sounds good too.
EM34 tuning eye looks like a recent "Dario" replacement and is nice and bright, but not responding, so the AVC must be not working.
I will try to get the circuit diagram and info and bring this set up to scratch. Will need to make a back board, for which I will need to find a good 'photo, the Radiomuseum one is not really good enough, need one of the larger knobs too.
Not bad for a throw away purchase for very little cash.
Any bits or info would be gratefully received. A project for next April.
The bakelite case is intact which surprised me as it feels to be quite thinly moulded, but very dirty and dull.
A check round with the meter revealed one blown pilot bulb, transformers OK. No shorts. The 6" remains of the mains wires were rotten rubber, elsewhere it is pvc.
Tuning cap mounting rubbers rotten and collapsed but the unusual cord drive still works well.
Valve filaments all intact. So on the lamp limiter it went. No frights so gave it full mains. Electrolytic caps not getting warm as the HT came up, and voila! Sound! With a bit of aerial wire there are sounds on all wavelengths.
HT a bit low, shorting the anode of the EF94 to chassis brought a big increase, so the capacitor to the g1 of the EL90 output valve was leaking. Tried to restuff it but the caps are glass tubes sealed with pitch, very thin and fragile. A new yellow peril replaced it.
That cooled the output valve's ardour and restored a good HT voltage, sounds good too.
EM34 tuning eye looks like a recent "Dario" replacement and is nice and bright, but not responding, so the AVC must be not working.
I will try to get the circuit diagram and info and bring this set up to scratch. Will need to make a back board, for which I will need to find a good 'photo, the Radiomuseum one is not really good enough, need one of the larger knobs too.
Not bad for a throw away purchase for very little cash.
Any bits or info would be gratefully received. A project for next April.
Boater Sam.
