Motorola ts907 low hv

[Yamamaya42]

Originally Posted by zeno

Not sure where we are now but.......
To measure H Out current you need to open the cathode pin from GND
and put a ampmeter in series with it. Depending on the meter you should
decouple the cathode with a cap to smooth it out. It goes in // with the
meter.
SAMS has instructions on value of cap & procedure.
Adjusting the H. osc ( hold) will effect the G-1 negative voltage.
Keep in mind the whole thing by design needs to be in resonance
to be happy. If the G-1 is in spec you are good till that point.
A freq counter or scope can show you if its at 15,750.

AGC as a rule goes to the RF amp & IF # 1 & 2.
SAMS will show AGC voltages either with or without a strong signal
or both ways. AGC problems are VERY rare, I cant really remember
many in 40 yrs & tens of thousands of sets.

73 Zeno
LFOD !

As mentioned above, this set does not have a horizontal efficiency/linearity coil to adjust, so where the cathode current can be measured, there is no way to adjust it on this.

and yes AGC problems are rare, they do happen, bit in this case, it's more likely the IF alignment is messed up.