old remote circuit

Yup, they come like that. All my small ceramic caps have a little black 'paint' on their tops... I don't know why.

George H.

you're giving it 12V?

this is quite normal for values less than 100pF

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That=E2=80=99s the specified 12v requirement.

The remote is supposed to have two outputs: one to switch the receiver on, and another to switch it off.

The problem is that only one switch works.

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Unless I'm missing posts, your description is lacking. (You don't state which output is missing.) I see only 2 posts from you, so I suspect I'm missing some. How many times have you posted here (sci.electronics.basics) on this subject? I'm trying to figure out if I'm missing posts, or we just have to ask for more info from you.

Thanks, Ed

It=E2=80=99s a fairly simple remote circuit.

As mentioned before, please see the following links for the circuit:

The remote does have two outputs: one to switch the receiver on, and another to switch it off.

I think the =E2=80=98on=E2=80=99 switching path does not work, since the re= ceiver responds only to the =E2=80=98off=E2=80=99 switch.

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--- Please don't top post. Bottom post, or inline post when necessary.

I doubt that the remote isn't working, since the circuit for both frequencies is identical except for the tank inductance, and if you know for sure that one channel's working, then the other one most likely is too..

The inductor is that loop, in trace, with two tails, and the ends are switched to output the "on" and "off" frequencies.

Does the LED come on when you push either switch?

How do you know it's not a receiver problem?

What kind of test equipment do you have?

Can you generate a schematic of the TX and RX and post it?

--- JF