Old Futaba Radio

Anything made prior to 1991 isn't going to "fly". That when the FCC changed the frequency allocation for RC.

| Anything made prior to 1991 isn't going to "fly". That when the FCC | changed the frequency allocation for RC.

There's a few possible problems with that statement.

1) It's not true. Pre-1991 gear could be retuned.

2) The poster appears to be in the UK. The FCC rules do not generally apply there.

(The 35 MHz statement should have been a clue.)

I've no idea what the rules are over there.

3) Now - 15 years = 1991, so if that's how old it is, it may be legal. Has it really been that long?

| > I've tried this T5LK Tx with the crystal from my Hitec Tx, and its | > completely not operating any servos(apart from jittering).

TX crystals aren't at 450 KHz or 10.7 MHz offsets from the desired frequencies like RX crystals, but I think there's still some concern with mixing the brands -- but I'd still expect it to work at least somewhat, as long as the bands aren't WAY off (like a 35 MHz crystal in a 72 MHz TX.)

| > My radio is FM, of a similar vintage to this one, around 15-20 | > years and I'm sure should work. | >

| > I'm concerned that this Tx may be AM or something, it makes | > no mention of FM anywhere on it, just that it's 35Mhz.

I'm pretty sure it's AM. Not that there's anything wrong with AM, but AM TXs don't work well with FM RXs.

Not so. I shoved a 'non futaba' TX Xtal I got on ebay in a futaba TX, and it was close, but sufficiently off to not produce more then a quivering servo.

Listening in on my Hitec-feather-attached-to-a-cheap-radio scanner, I could hear it faintly..reckon it was at least 4Khz off tune.

Should be able to determine that fairly easily.

Just a thought -- a fellow with no money cannot support himself in the hobby even if given a completely new and ready-to-fly rig. Are you really doing him a favor? I think not...unless you are prepared to do everything for him. Do you have that much time?

Ken

Hi sorry for the confusion, I am in the UK.

Yes frankly, I do have lots of time. But more than that he's a good friend and neighbour, who's had a very hard time recently. He's never flown before and has scratch built a plane that requires 3 channels, and he only has a 2 channel boat radio. The prospect of him trying to land on his, and the planes first flight when the throttle is half open or more doesn't bode well.

The radio was sold to me on the basis that it's FM, but I'm increasingly convinced its AM, thanks to Doug for that.

Can anyone tell me an easy way to identify for sure wether AM or FM?

Thanks All

My thought would be is it FM?? A quick google search mutters a lot about converting them from AM to FM, it might be it's AM.

You could try a local club and see if they have a frequency scanner to see if you can detect if it's actually transmitting anything. If it is might be AM or FM (Or a local model store may have the mini scanners, that would work) If it's transmitting then try a Futaba Rx is you can, to try and eliminate that the idea about +ve and negative shift that is / was different between between Futaba and Hitec?

Failing that call ripmax on 020-8282 7500 they might be able to help as they are Futaba's UK Distributer

"R.Moone" schreef in bericht news:e268b4$mh9$ snipped-for-privacy@news.freedomsurf.net...

Hi,

Just had a look at Futaba-US :

that list there are some 5 channels transmitters mentioned, and clearly some FM-transmitters are clearly mentioned as being "FM" in their name.

Anyway, mixing brands of crystals for a transmitter is not a good idea. For receivers, sometimes it works.

Olivier.

T5LK was an FM transmitter but cannot work with Hitec crystals except perhaps for that odd 72 MHz frequency used by Americans.

"A.T." wrote

Ah, a wise guy, huh?

Ed Cregger

(Just kidding, my friend)