Black Jupiter 2000 Function generator circuit.

[Yorkie]

Just a point which has been lost in the discussion about what might be wrong with the generator John, you wrote:

I am just a novice I was using the generator to do rf alignment on a Pilot u650 1936 radio resoration nothing seemed to be happening so hooked up to scope and there was no amplitude on signal I had bought the scope on ebay hardly ever used it sods law I only bought it to try and learn how to use it not repair it ha ha.

Without wishing to sound patronising, that generator is for such tasks as checking the distortion of amplifiers - it isn't the right equipment to align RF stages of radios, and unless you connected it via a dummy load, it isn't the right method. Furthemore, you should never connect a generator or other test gear directly to a radio - only via a 0.1uF high voltage (EG, 630V DC) capacitor or you risk damaging the output circuitry of the test gear.

The U650 is quite a complex receiver, in that it has four wavebands and an RF stage. I'd be extremely reluctant to tamper with the RF alignment unless someone else had tampered with it first. It's highly unlikely that the alignment will be off tune. The service sheet for the U650 states that you should first align the IF stages (via a 0.1uF high voltage isolation cap, then the RF stages via a dummy load connected to the E & E sockets. It outlines thart the sequence should be MW, SW2, SW1 and LQW in that order, and it detials how this should be acomplished.

I'm wondering therefore, whether - if you connected the Jupiter directoly to the front end of the radio without an isolating cap - you may have damaged the output circuitry (TR20, & 21 for example?) Worth checking if you have a square wave as shown on the circuit of the triangle generator and waveform shaping circuit at S10, next to TR11. If you do, at least that narrows it down a bit.

I hope these comments sound helpful rather than critical John.

Best of luck!