Where are you located?

I repair radio systems for a large hobby shop in the MidWest, just north
of St. Louis, MO.

Have been doing R/C repairs since the 1960's

Will help if I can.

Make and model of car and radio?

Hugh




Don Bowey wrote:
On 12/18/06 6:44 PM, in article
, "
wrote:


Don Bowey wrote:

On 12/18/06 5:17 PM, in article
s.com, "
wrote:


Homer J Simpson wrote:

wrote in message
legroups.com...


What happens if the transmitter is switched off?

The car will totally stop twitching. So, I thougt it could be
transmitter that was bad, but I tried with 3 different transmitter and
still the same... Looks as if the receiver has problem treating the
incoming signal?

Looks like it is having problems round the detector / decoder areas. You
probably need more then a DMM to fix this.

How should I go about to start troubleshooting? And what kind of test
tool I would need?




What type of receiver is it? Regen, single or dual conversion?

Don

Hi Don, I wish I can answer your question. All I know is this is a 27
Mhz AM receiver for R/C car. Do you think it will be too much for a
beginer to fix? I mean the circuit looks pretty simple, so I figured I
want to give it try.



If the receiver does NOT have a crystal, it is probably a regen receiver and
you might be able to retune it to the transmitter. If there is no crystal,
look over the receiver to see if it has small adjustable capacitors and/or
coils that have a slug inside that can be adjusted. You will need plastic
tools to make any adjustments. Let me know what you find.

If the receiver has a crystal, be sure it is seated in its holder.

If it is not a regen, then it needs tools such as a scope and signal
generator in the hands of someone who can trouble shoot without having a
schematic.

Post the name of the city where you live and maybe someone will volunteer to
help.

Don