What's the difference between single / dual conversion receivers.

Also, if you have a PCM receiver do you need a PCM transmitter?

If you are flying scale / expensive / larger planes, is your choice of the above likely to differ?

Please help as I am confused about choice of radio gear for my next model.

Thanks.

I have dual conversion on all my RX's
If you have a PCM RX you will need a TX that has PCM, my Futaba 9C has both PPM (FM) & PCM.
with PCM you can use the fail safe mode in case you loose a signal and the engine will idle down to what you set it to in your TX.
What type of radio equipment do you have currently?
NEDYOB

I HIGHLY recommend Berg 7P receivers. They're very small, and I've never had ANY interference with them. I believe they are single conversion, but don't quote me on this.

[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXLBY9&P=0]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXLBY9&P=0[/link]
[link=http://www.castlecreations.com/products/berg_7-channel.html]http://www.castlecreations.com/products/berg_7-channel.html[/link]

Kerry

Dual conversion gives divides the incoming signal twice for better noise rejection of certain types of interference.

With PCM you need a transmitter that is both PCM AND the same manufacturer, you cant run JR pcm recievers with Futaba or any other transmitters besides JR, the encoding is proprietary.

PCM is the way to go if you already have a transmitter, if not then 2.4ghz is the hot ticket right now.

I just checked out th Berg receivers and actually they are triple tuned!!

Berg receivers are single conversion. Yes they are triple tuned but still single conversion--there is a difference. The triple tuned refers to the degree of filtering; no. of poles etc. INMHO, the Berg's are a very good receiver. You can get excellent recievers in either single or dual conversion, you can also get marginal receivers in single or dual conversion. Either type has it's advantages and dissadvantages and either can do an excellent job of controlling your models. One big advantage the Berg has over many other FM recievers is the Digital Signal Processing where a degree of fail safe can be had with conventional PPM AM transmitters along with better noise rejection.

I've found the cheap, single-conversion, park flyer receiver to be good only if you aren't flying around other TXs in the same band (i.e. flying by youself at a park). At my club, I got some bad glitching when flying in front of the flight line (near other TXs). Because of this I pretty much stick to dual-conversion FM (PPM) RXs, even in my park flyers. However, I do have a couple PCM receivers for my helis, and recently got a few 2.4GHz spread spectrum receivers.

Note that there is a difference between the "cheap park flyer" RXs I spoke of, which have limited range, and full range single-conversion RXs (most or all of JR's RXs are single-conversion, and Futaba, Berg, and Hitec make some full range single conversion RXs, I believe). I have no personal experience with these full range single-conversion RX's, but I'd expect them to be on par with the dual conversion receivers.

Thanx for the info Rodney. I didn't know that about the Berg receivers. [8D]