Bruce
The futaba I am talking ab out is a 6exap. I said it had some kind of crystal in it, but it is a diode that that protects the tx. I can't use my voltmeter on it either, so I have to trust the one on the tx. Maybe I am mistaken about not being able to charge the tx battery when it is still in the tx. At my age I get so confused. Now what were we talking about?