RE: Ask your electric questions HERE!
It depends on the Rx. I use a Berg Stamp 4 which is a full range, single conversion, Rx that can be used in glow models.
The advice to stay away from the cheaper single conversion Rx's was likely because they are more prone to interference from other radios. How much I don't know because I've not used one but didn't get one because of what I read here at RCU. I choose to spend the extra $20 than take the chance of crashing because of a glitch.
As long as the Rx is on the same frequency as your Tx, and the Rx is compatible with your Tx, it doesn't matter whether your Rx is single or double conversion.