G4/214 Geloso problems
 

Hi all, I'm repairing an old Geloso G4/214 receiver.
I checked and subsituted (only the ones checking bad) capacitors, resistors
and solid state diodes.
All tubes have been tested with an emission tube tester.
Potentiometers and switches have been cleaned.

The set appears to have been tweaked by someone else so the repair doesn't
seem easy at a first glance.
However here're the symptoms, I think they are unrelated but I can't be very
sure anyway.

1) no reception on any band, there's not the slightest crack or change of
background noise even when touching the antenna connectors.
2) USB and LSB positions give a loud AC noise on the speaker but the AM
position gives "normal" background hiss and not the slightest hint of AC
noise.

Next step will be injecting a signal on the antenna socket and try to follow
it through the various stages but I ask here anyway if these symptoms ring
the experts a bell maybe.

Thanks in advance and best regards.

Frank IZ8DWF

G4/214 Geloso problems
 

On Mar 20, 12:46*pm, wrote:
Hi all, I'm repairing an old Geloso G4/214 receiver.
I checked and subsituted (only the ones checking bad) capacitors, resistors
and solid state diodes.
All tubes have been tested with an emission tube tester.
Potentiometers and switches have been cleaned.

The set appears to have been tweaked by someone else so the repair doesn't
seem easy at a first glance.
However here're the symptoms, I think they are unrelated but I can't be very
sure anyway.

1) no reception on any band, there's not the slightest crack or change of
background noise even when touching the antenna connectors.
2) USB and LSB positions give a loud AC noise on the speaker but the AM
position gives "normal" background hiss and not the slightest hint of AC
noise.

Next step will be injecting a signal on the antenna socket and try to follow
it through the various stages but I ask here anyway if these symptoms ring
the experts a bell maybe.

Thanks in advance and best regards.

Frank IZ8DWF

Frank,that is a nice looking receiver,,,It is double conversion..Two
6BE6 tubes in mixers. your problem could be one of the oscillators
not running...If you have a scope or counter ,probe pin 1 on both 6BE6
's should show a healthy osc signal on both..If no scope or counter,
you can use an auxillary receiver to tune to osc freqs,the manual
may show these freqs..On this old stuff it`s good idea to test all
tubes ,make sure that they are good..Good Luck 73 Harold W4PQW

G4/214 Geloso problems